1. Manuals
  2. Brands
  3. Daikin Manuals
  4. Air Handlers
  5. Altherma 3 H HT ECH2O Series
  6. Service manual

Daikin Altherma 3 H HT ECH2O Service Manual

Hide thumbs Also See for Altherma 3 H HT ECH2O:
1
2
3
Table Of Contents
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
Table of Contents

Advertisement

Quick Links

Download this manual
EPRA14D▲V▼
EPRA16D▲V▼
EPRA18D▲V▼
EPRA14D▲W▼
EPRA16D▲W▼
EPRA18D▲W▼
Service manual
Daikin Altherma 3 H HT ECH₂O
ETSH16P30E▲▼
ETSH16P50E▲▼
ETSHB16P30E▲▼
ETSHB16P50E▲▼
ETSX16P30E▲▼
ETSX16P50E▲▼
ETSXB16P30E▲▼
ETSXB16P50E▲▼
▲= A, B, C, ..., Z
▼= , , 1, 2, 3, ..., 9

Advertisement

Table of Contents
loading

Related Manuals for Daikin Altherma 3 H HT ECH2O

Summary of Contents for Daikin Altherma 3 H HT ECH2O

  • Page 1 Service manual Daikin Altherma 3 H HT ECH₂O EPRA14D▲V▼ ETSH16P30E▲▼ EPRA16D▲V▼ ETSH16P50E▲▼ EPRA18D▲V▼ ETSHB16P30E▲▼ ETSHB16P50E▲▼ EPRA14D▲W▼ ETSX16P30E▲▼ EPRA16D▲W▼ ETSX16P50E▲▼ EPRA18D▲W▼ ETSXB16P30E▲▼ ETSXB16P50E▲▼ ▲= A, B, C, …, Z ▼= , , 1, 2, 3, …, 9...
  • Page 2 The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V.. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services presented therein.
  • Page 3 • Technical data – Piping diagram: Updated for new outdoor units. • Technical data – Wiring diagram: Diagram for new outdoor units added. • Technical data – Component overview: Component overview for new outdoor units added. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 4: Table Of Contents

    F3-00 – Outdoor unit: Malfunction of discharge pipe temperature............. 55 3.5.49 F3-24 – Compressor shell temperature error....................55 3.5.50 F6-00 – Outdoor unit: Abnormal high pressure in cooling................56 Service manual EPRA14~18D + ETSH/X(B)16P30+50E Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 5 3.6.13 Symptom: Power consumption too high ....................... 103 3.6.14 Symptom: System does not start or operate....................105 3.6.15 Symptom: The pump is blocked........................107 4 Components EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 6 4.22.1 Checking procedures ............................308 4.22.2 Repair procedures ............................310 4.23 Thermistors ..................................315 4.23.1 Refrigerant side thermistors .......................... 315 4.23.2 Water side thermistors ..........................322 Service manual EPRA14~18D + ETSH/X(B)16P30+50E Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 7 Component overview: Outdoor unit – Single phase ..................418 7.4.3 Component overview: Outdoor unit – Three phase..................419 Field information report ..............................421 Service tools ..................................424 Field settings ................................... 425 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 8: Safety Precautions

    WARNING: FLAMMABLE MATERIAL CAUTION Indicates a situation that could result in minor or moderate injury. NOTICE Indicates a situation that could result in equipment or property damage. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 9: Dangers

    WARNING Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY use accessories, optional equipment and spare parts made or approved by Daikin unless otherwise specified. WARNING...
  • Page 10 WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). WARNING Make sure the work site environment is clean and safe to work in. Beware of spilled fluids, like water, oil or other substances.
  • Page 11 HFC refrigerant because there is no chlorine component in the refrigerant. In case of R32 (HFC) refrigerant, any flame in contact with (leaking) refrigerant is extremely dangerous. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 12 After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely. ▪ Make sure all covers are closed before starting up the unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 13 WARNING All maintenance staff and others working in the local area MUST be instructed on the nature of work being carried out. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 14 When oil is drained from a system, it MUST be carried out safely. WARNING Make sure the ventilation machinery and outlets are operating adequately and are NOT obstructed. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 15: Cautions

    Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard. NOTICE Make sure the field piping and connections are NOT subjected to stress. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 16: General Operation

    (if applicable) are stopped. Cooling mode The compressor capacity step is defined by the evaporation temperature, which is calculated through the low pressure sensor read-out. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 17 Below list is only for reference for compatible units. Always refer to the Engineering Databook for compatibility. Floorstanding Floorstanding heat HPSU ETSH/X pump convector FWXV Wall mounted heat Concealed heat pump convector pump convector FWXT FWXM EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 18: Troubleshooting

    1 Press the left dial to open the menu and go to Reset. 2 Press the left dial to reset the error. Result: The error has been reset. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 19: To Check The Malfunction History

    3.4 To check the running hours of the system 1 Go to [8.9]: Information > Running hours. You see a list of the running hours of the components. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 20: Error Based Troubleshooting

    10 Perform a check of the water pump. See "4.27 Water pump" [  352]. Possible cause: Faulty water pump. 11 Perform a check of the hydro PCB. See "4.11 Hydro PCB" [  193]. Possible cause: Faulty hydro PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 21: 04 - Water Flow Problem During Domestic Hot Water Production

    9 Perform a check of the water pump. See "4.27 Water pump" [  352]. Possible cause: Faulty water pump. 10 Perform a check of the hydro PCB. See "4.11 Hydro PCB" [  193]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 22: 05 - Water Flow Problem During Heating/Sampling

    8 Perform a check of both 3-way valves. See "4.1 3-way valve" [  108]. Possible cause: Faulty 3‑way valve(s). 9 Perform a check of the water pump. See "4.27 Water pump" [  352]. Possible cause: Faulty water pump. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 23: 06 - Water Flow During Cooling/Defrost

    8 Perform a check of both 3-way valves. See "4.1 3-way valve" [  108]. Possible cause: Faulty 3‑way valve(s). 9 Perform a check of the water pump. See "4.27 Water pump" [  352]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 24: 07 - Water Flow Problem. Pump De-Blocking Active

    1 Perform a check of the water pump. See "4.27 Water pump" [  352]. Possible cause: Faulty water pump. 2 Perform a check of the hydro PCB. See "4.11 Hydro PCB" [  193]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 25: Entering Water Thermistor Abnormality Of Outdoor Unit

     133]. Possible cause: Faulty ACS digital I/O PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 26: Mixed Water Thermistor Abnormality

    3.5.11 81-07 – Mixed leaving water temperature after tank thermistor abnormality Trigger Effect Reset Mixed leaving water Unit will stop operating. Automatic reset. thermistor (after tank) is out of range. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 27: Heat Exchanger Freeze-Up Protection Activated During Defrost (Error)

    7 Check if the refrigerant circuit is clogged. See "5.2 Refrigerant circuit" [  365]. Possible cause: Clogged refrigerant circuit. 8 Check for the presence of non‑condensables and/or humidity in the refrigerant circuit. See "5.2 Refrigerant circuit" [  365]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 28: Heat Exchanger Freeze-Up Protection Activated During Heating/Domestic Hot Water

    It is recommended to perform the checks in the listed order. 1 Perform a check of the outlet water after heat exchanger thermistor. See "4.23 Thermistors" [  315]. Possible cause: Faulty outlet water after heat exchanger thermistor. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 29: Heat Exchanger Freeze-Up Protection Activated During Cooling (Error)

    7 Check for the presence of non‑condensables and/or humidity in the refrigerant circuit. See "5.2 Refrigerant circuit" [  365]. Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 30: Heat Exchanger Freeze-Up Protection Activated During Cooling (Warning)

    See "5.2 Refrigerant circuit" [  365]. Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. 7 Perform a check of the main PCB. See "4.16 Main PCB" [  226]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 31: 00 - Abnormal Increase Outlet Water Temperature (Domestic Hot Water)

     140]. Possible cause: Faulty backup heater contactor(s). INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 32: 00 - Abnormal Increase Outlet Water Temperature

     315]. Possible cause: Faulty outlet water thermistor for bizone. 2 Check the field setting [9‑00]. See "4.24 User interface" [  336]. Possible cause: Mixed water temperature >[9‑00] setting+5K. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 33: 02 - Overheating Mixed Water Circuit (Thermostat)

    INFORMATION It is recommended to perform the checks in the listed order. 1 Check the set trigger temperature of the safety thermostat. See "5.4 Manufacturer components" [  386]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 34: 08 - Overheating Water Circuit

    Possible cause: Faulty backup heater contactor(s). 4 Perform a check of the hydro extension PCB. See "4.12  Hydro extension PCB" [  201]. Possible cause: Faulty hydro extension PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 35: A1-00 - Zero Cross Detection Problem

    To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check the water pressure. See "5.3 Water circuit" [  377]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 36: Backup Heater Overheated

    "5.3 Water circuit" [  377]. Possible cause: Water flow is too low. 3 Purge the water circuit. See "5.3 Water circuit" [  377]. Possible cause: Air in the water circuit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 37: Tank Disinfection Function Not Completed Correctly

    ▪ Backup heater is restricted during disinfection, ▪ Backup heater NOT allowed. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 38: Too Long Domestic Hot Water Heat-Up Time Required

    Possible cause: Domestic hot water consumption too large. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 39: C0-00 - Flow Sensor Malfunction

    To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check the water pressure. See "5.3 Water circuit" [  377]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 40: C0-02 - Flow Switch Malfunction

    Possible cause: The detected water flow is caused by an external pump. 5 Perform an electrical check of the water flow sensor. See "4.25  Water flow sensor" [  344]. Possible cause: Faulty water flow sensor. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 41: C4-00 - Heat Exchanger Temperature Sensor Problem

    It is recommended to perform the checks in the listed order. 1 Perform a check of the inlet water thermistor (outdoor unit side). See "4.23 Thermistors" [  315]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 42: Room Temperature Sensor Problem

    Possible cause: User interface (main PCB) receives no power. 4 Perform a check of the hydro PCB. See "4.11 Hydro PCB" [  193]. Possible cause: Faulty hydro PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 43: E1-00 - Outdoor Unit: Pcb Defect

    Possible cause: Thermal interface grease NOT applied properly on the heat sink. INFORMATION Make sure to use thermal interface grease Shin Etsu G-776 (spare part number 2269571). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 44: E2-00 - Leakage Current Detection Error

    Possible cause: Refrigerant overcharge. 8 Check for the presence of humidity in the refrigerant circuit. See "5.2 Refrigerant circuit" [  365]. Possible cause: Humidity in the refrigerant circuit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 45: E3-00 - Outdoor Unit: Actuation Of High Pressure Switch

     280]. Possible cause: Faulty outdoor unit fan motor. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 46: E3-24 - High Pressure Switch Abnormality

     280]. Possible cause: Faulty outdoor unit fan motor. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 47: E4-00 - Abnormal Suction Pressure

    3.5.39 E5-00 – Outdoor unit: Overheat of inverter compressor motor Trigger Effect Reset Compressor overload is Unit will NOT stop Automatic reset if the unit detected. operating. runs without warning for 60 seconds. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 48: E6-00 - Outdoor Unit: Compressor Startup Defect

    Unit will NOT stop Automatic reset after a NOT rotate when the operating. continuous run for compressor is energized. 10 minutes. Unit will stop operating Manual reset via user interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 49: E7-00 - Outdoor Unit: Malfunction Of Outdoor Unit Fan Motor

    15~30 seconds after ON interface. signal. It can occur that the error code is triggered when the fan motor is running caused by a faulty rotating sensor signal. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 50: E8-00 - Outdoor Unit: Power Input Overvoltage

    ±4%), ▪ Power drop, ▪ Short circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 51: E9-00 - Malfunction Of Electronic Expansion Valve

    ±4%), ▪ Power drop, ▪ Short circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 52: Outdoor Unit: Cool/Heat Switchover Problem

    Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 53: 4-Way Valve Switching Error

    Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 54: Abnormal Increase Tank Temperature

    Wait until preheating operation is done. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 55: F3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Temperature

    Unit will stop operating Manual reset via user thermistor temperature after 4 automatic retry. interface. <Tc (saturated condensation temperature) – 1 K for 30 minutes after compressor start‑up. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 56: F6-00 - Outdoor Unit: Abnormal High Pressure In Cooling

    Possible cause: Clogged refrigerant circuit. 8 Perform a check of the outdoor unit fan motor. See "4.18  Outdoor unit fan motor" [  280]. Possible cause: Faulty outdoor unit fan motor. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 57: Outdoor Unit: Abnormal High Pressure, Actuation Of High Pressure Switch

     280]. Possible cause: Faulty outdoor unit fan motor. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 58: H0-00 - Outdoor Unit: Voltage/Current Sensor Problem

    Make sure to use thermal interface grease Shin Etsu G-776 (spare part number 2269571). INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 59: H1-00 - External Temperature Sensor Problem

    Possible cause: ▪ Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%), ▪ Power drop, ▪ Short circuit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 60: H4-00 - Malfunction Of Low Pressure Switch

    Possible cause: Expansion valve CANNOT keep minimum superheat of 3  K while running as evaporator. 4 Check if the refrigerant circuit is correctly charged. See "5.2  Refrigerant circuit" [  365]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 61: H6-00 - Outdoor Unit: Malfunction Of Position Detection Sensor

    6 Check for the presence of non‑condensables and/or humidity in the refrigerant circuit. See "5.2 Refrigerant circuit" [  365]. Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 62: H8-00 - Outdoor Unit: Malfunction Of Compressor Input System

    3.5.59 H9-00 – Outdoor unit: Malfunction of outdoor air thermistor Trigger Effect Reset Outdoor air thermistor Unit will stop operating. Manual reset via user input is out of range. interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 63: Second Tank Temperature Sensor Problem

    To solve the error code INFORMATION It is recommended to perform the checks in the listed order. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 64: Water Pressure Sensor Abnormality

    Manual reset via user input is out of range. interface. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 65: J3-10 - Compressor Port Thermistor Abnormality

    Compressor is running for more than 20 minutes and compressor shell thermistor <−20°C. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 66: J5-00 - Malfunction Of Suction Pipe Thermistor

    "4.23 Thermistors" [  315]. Possible cause: Faulty heat exchanger thermistor. 2 Perform a check of the main PCB. See "4.16 Main PCB" [  226]. Possible cause: Faulty main PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 67: J6-07 - Outdoor Unit: Malfunction Of Heat Exchanger Thermistor

     133]. Possible cause: Faulty ACS digital I/O PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 68: J6-33 - Sensor Communication Error

    3.5.71 J8-00 – Malfunction of refrigerant liquid thermistor Trigger Effect Reset Refrigerant liquid Unit will stop operating. Automatic reset. thermistor detects an abnormal value (open or short circuit) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 69: Malfunction Of High Pressure Sensor

    3.5.73 L3-00 – Outdoor unit: Electrical box temperature rise problem Trigger Effect Reset Switch box temperature is Unit will stop operating. Manual reset via remote too high. controller. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 70: L4-00 - Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise

    ±4%), ▪ Power drop, ▪ Short circuit. 3 Perform a check of the inverter PCB. See "4.13 Inverter PCB" [  209]. Possible cause: Faulty inverter PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 71: L5-00 - Outdoor Unit: Inverter Instantaneous Overcurrent

    4 Perform a check of the inverter PCB. See "4.13 Inverter PCB" [  209]. Possible cause: Faulty inverter PCB. 5 Perform a check of the compressor. See "4.6 Compressor" [  161]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 72: L9-00 - Prevention Of Compressor Lock

    Possible cause: Faulty compressor or miswiring of the compressor power supply cable. 2 Check if the power supply is compliant with the regulations. See "5.1 Electrical circuit" [  361]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 73: Malfunction In Communication System Of Outdoor Unit

    Possible cause: Faulty ACS digital I/O PCB. 4 Perform a check of the outdoor unit fan motor. See "4.18  Outdoor unit fan motor" [  280]. Possible cause: Faulty outdoor unit fan motor. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 74: P1-00 - Open Phase Power Supply Imbalance

    "4.16 Main PCB" [  226]. Possible cause: Onboard sensor error. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 75: P4-00 - Outdoor Unit: Malfunction Of Radiating Fin Temperature Sensor

    3.5.82 U0-00 – Outdoor unit: Shortage of refrigerant Trigger Effect Reset Refrigerant shortage Unit will stop operating. Automatic reset. detected. Power reset via outdoor unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 76: U1-00 - Malfunction By Reverse Phase/Open Phase

    It is recommended to perform the checks in the listed order. 1 Check if the power supply is compliant with the regulations. See "5.1 Electrical circuit" [  361]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 77: U2-00 - Outdoor Unit: Defect Of Power Supply Voltage

    "4.17 Noise filter PCB" [  255]. Possible cause: Faulty noise filter PCB. 7 Wait until the compressor restarts. Possible cause: ▪ Momentary drop of voltage, ▪ Momentary power failure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 78: U3-00 - Under Floor Heating Screed Dry Out Function Not Completed Correctly

    Possible cause: Faulty wiring between the outdoor unit, indoor unit and domestic hot water tank. 3 Perform a check of the main PCB. See "4.16 Main PCB" [  226]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 79: U5-00 - User Interface Communication Problem

    Possible cause: User interface (main PCB) receives no power. 3 Check if the unit user interface functions correctly. See "4.24  User interface" [  336]. Possible cause: Faulty user interface on unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 80: U6-38 - Extension/Hydro Communication Problem

    PCB" [  201]. Possible cause: Faulty hydro extension PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 81: U7-00 - Outdoor Unit: Transmission Malfunction Between Main Microcomputer - Inverter Microcomputer

    2 Check the communication wiring between the remote controller and the unit. "4.24 User interface" [  336]. Possible cause: Faulty wiring between the remote controller and the unit. 3 Perform a check of the room thermistor: EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 82: U8-03 - No Connection With Room Thermostat

    3 Check the communication wiring between the remote controller and the unit. "4.24 User interface" [  336]. Possible cause: Faulty wiring between the remote controller and the unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 83: U8-04 - Unknown Usb Device

    CANNOT be found on the USB/SDcard. CAUTION Always safely remove and eject media. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 84: U8-06 - Bizone Kit Canopen Communication Error

    3 Check if the unit user interface functions correctly. See "4.24  User interface" [  336]. Possible cause: Faulty user interface on unit. 4 Perform a check of the hydro PCB. See "4.11 Hydro PCB" [  193]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 85: U8-09 - User Interface Software Version / Indoor Unit Compatibility Error

    It is recommended to perform the checks in the listed order. 1 Check that the AP mode is active (= WLAN adapter active as access point). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 86: Indoor Unit, Outdoor Unit Mismatching Problem

    3.5.99 UA-16 – Extension/hydro communication problem Trigger Effect Reset Communication Unit will not stop Manual reset via user abnormality between operating. interface. hydro PCB and hydro extension PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 87: Hpsu/Hydro Combination Abnormality

    PCB. Hydro PCB needs to be loaded with "HPSU version" software. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 88: Reversed Piping Or Bad Communication Wiring Detection

     392]. Possible cause: Piping and/or wiring mismatch. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 89: Symptom Based Troubleshooting

    Adjust water pressure if checked during filling, required (±2 bar). ▪ Air was purged from the water circuit after filling, ▪ Leakage. ▪ Expansion vessel broken or not properly pre-adjusted. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 90 Check Repair Incorrect setting of pump Incorrect setting. Confirm setting [F‑0]. Adapt setting [F‑0] if operation mode required (factory setting: (continuous, sample, [F‑0]=1). request) (setting [F‑0D]). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 91: Tap Water Related

    No display. Display contrast too high or Adjust contrast. too low. Blocked screen. Mismatch between Power reset and user software and EEPROM on interface reset. user interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 92: Symptom: Leak

    ONLY the backup heater to operate. Compressor will start when water temperature is high enough (for detailed water temperature values, see the operation range in the databook). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 93 Check high pressure side pressure side plate type plate type heat heat exchanger, exchanger good ▪ Correct the refrigerant water flow and heat charge. exchange, ▪ Check refrigerant charge. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 94 ▪ Check heat sink inverter ▪ Replace heat sink thermistor - deviation. (higher temperature thermistor, inverter thermistor, measured than actual). ▪ Check PCB. ▪ Replace PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 95: Symptom: Abnormal Presence Of Ice

    Fix leaks. refrigerant. Ice build-up at entry spot Refrigerant shortage. ▪ Check refrigerant charge, ▪ Replace refrigerant, of refrigerant. ▪ Check for leaks. ▪ Fix leaks. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 96: Symptom: Domestic Hot Water Capacity Shortage

    Root cause category: component – electrical Possible failure Root cause Check Repair 3‑way valve blocked. Component failure. Check the 3‑way valve. Replace the 3‑way valve. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 97: Symptom: General Capacity Shortage

    Check high pressure side pressure side plate type plate type heat heat exchanger, exchanger good ▪ Correct the refrigerant water flow and heat charge. exchange, ▪ Check refrigerant charge. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 98 Check setting [5‑01]. Change setting [5‑01] to 0 point was set too low. temperature" [5‑01] was or higher to more quickly set too low. allow backup heater operation. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 99 ▪ Faulty expansion valve ▪ Check expansion control. valve. Backup heater NOT Component failure. Check backup heater. Replace backup heater. working. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 100: Symptom: Space Heating (Cooling) Capacity Shortage

    Change setting [4‑00] to 1. disabled (setting [4‑00] is operation mode [4‑00] is set to 0 or 2). set 0 (backup heater disabled) or 2 (ONLY domestic hot water). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 101 Too long water piping, with the water pump ▪ many heating characteristics (See check emitters. of water pump). Decreased water flow will cause a drop in capacity. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 102: Symptom: Inaccurate Temperature Control

    PCB. temperature control of the ▪ contact between mixed zone (low sensor and pipe. temperature). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 103: Symptom: Power Consumption Too High

    ONLY. [4‑06] is set to 1. ONLY. [4‑06] is set to 1. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 104 See the system to run at full the capacity tables in the capacity. engineering data book to know max. system capacity at indicated conditions. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 105: Symptom: System Does Not Start Or Operate

    (cooling) or domestic hot operation is NOT activated domestic hot water water operation on the on the user interface. operation is activated on user interface. user interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 106 ▪ Check good operation of outdoor unit PCB. Reactor coil broken. Component problem. Check continuity of the Replace the reactor coil in reactor coil. case faulty. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 107: Symptom: The Pump Is Blocked

    Note: Do NOT use excessive force. If you cannot deblock the rotor of the pump with this method, you will need to disassemble the pump and turn the rotor by hand. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 108: Components

    3‑way valve body c Button Is the problem solved? Action No further actions required. Perform an electrical check of the 3-way valve, see "Checking procedures" [  108]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 109 Prerequisite: First perform an electrical check of the 3-way valve, see "Checking procedures" [  108]. 1 Turn ON the power of the unit. 2 Activate DHW operation via the user interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 110 Mark the original position of the 3‑way valve body axle. At the end of this procedure, manually put the 3‑way valve back in its original position by rotating the 3‑way valve body axle. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 111 Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 Disconnect the connector from the 3-way valve. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 112 3-way valve motor on the 3-way valve body. a Button b 3-way valve motor c 3-way valve body EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 113 1 Drain water from the water circuit, see "5.3.2 Repair procedures" [  381]. 2 Disconnect the connector from the 3-way valve. a Connector 3 Remove the three clips from the 3‑way valve body. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 114 Check the condition of the O-rings and replace if needed. Apply water or silicon grease to the O-rings before installation. 1 Install the O-rings on the rear pipe and the bottom pipe. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 115 3 Connect the three pipes (bottom, rear and upper) to the 3‑way valve body. Install the three clips to secure the pipes. 4 Connect the connector to the 3-way valve. a Connector EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 116: Internal Heat Generator Circuit 3-Way Valve

    1 Check that the 3‑way valve motor is fixed correctly on the 3‑way valve body. If needed push the buttons on the side of the motor and rotate to correctly fix the motor to the 3‑way valve body. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 117 J908 correct? Perform a position check of the 3‑way valve (automatic procedure), see "Checking procedures" [  116]. Perform a check of the hydro extension, "4.12.1 Checking procedures" [  201]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 118 Prerequisite: First perform a position check (automatic procedure), see "Checking procedures" [  116]. Prerequisite: Remove the 3‑way valve motor from the 3‑way valve body, see "Repair procedures" [  119]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 119 3‑way valve body broken, replace the 3‑way valve body, see "Repair procedures" [  119]. Repair procedures To remove the 3-way valve motor Prerequisite: Stop the unit operation via the user interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 120 45° clockwise to the straight position. CAUTION The 3-way valve motor connector must be at the left side. 3 Connect the connector to the 3-way valve motor. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 121 5 Pull the 3‑way valve body away from the domestic hot water inlet pipe and remove it. 6 Remove the O-rings from the space heating inlet pipe and the exit pipe. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 122 1 Install the O-rings on the space heating inlet and the exit pipe. a O-ring b Space heating inlet pipe c Exit pipe 2 Install the 3‑way valve body in the correct location in the indoor unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 123 3 Cut all tie straps that fix the wiring harness, and remove the wiring harness from the unit. 4 To install the 3-way valve wiring harness, see "Repair procedures" [  119]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 124: 4-Way Valve

    3 Measure the resistance of the 4-way valve coil between the pins of the 4-way valve connector. Result: The measured value must be 1,4 kΩ ± 10%. Is the measured value correct? Action Continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 125 4‑way valve connection of the PCB. The measured voltage MUST be: ▪ 230 V AC when operating in Heating mode ▪ 0 V AC when operating in Cooling mode EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 126 2 Check with a contact thermometer (or by touching) if the flow through the 4- way valve corresponds with the flow shown in the flow diagram. (See "7.3 Piping diagram" [  413]). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 127 5 Check with a contact thermometer (or by touching) if the flow through the 4- way valve corresponds with the flow shown in the flow diagram. (See "7.3 Piping diagram" [  413]). A Refrigerant flow through 4‑way valve in cooling operation EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 128 Action 4‑way valve is OK. Return to the troubleshooting of the specific error and continue with the next procedure. Perform the next step of this procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 129 Replace the body of the 4‑way valve, "4.2.2 Repair procedures" [  130]. Leaks may be found in the refrigerant circuit. Perform a pressure test of the refrigerant circuit, see "5.2.1 Checking procedures" [  365]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 130: Repair Procedures

    Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see "5.2.2 Repair procedures" [  368]. 1 Remove the 4‑way valve coil from the 4‑way valve body, see "4.2.2  Repair procedures" [  130]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 131 5 Wrap a wet rag around the 4‑way valve body and any other components near the 4‑way valve and solder the 4‑way valve pipes to the refrigerant pipes. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 132 2 Install and tighten the screw to fix the 4‑way valve coil. 3 Route the 4‑way valve coil harness towards the appropriate PCB. 4 Connect the 4-way valve connector to the appropriate PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 133: Acs Digital I/O Pcb

    1 Turn ON the power of the unit. 2 Measure the voltage on connector X1A of the ACS digital I/O PCB. Result: The measured voltage MUST be 200~240 V AC. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 134 "Checking procedures" [  255]. For three phase units 1 Measure the output voltage on connector X803A on the main PCB. Result: The measured voltage MUST be 200~240 V AC. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 135  137]. To check if the correct spare part is installed 1 First perform all earlier checks of the ACS digital I/O PCB, see "4.3.1 Checking procedures" [  133]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 136 Prerequisite: First perform all earlier checks of the ACS digital I/O PCB, see "4.3.1 Checking procedures" [  133]. 1 Measure the continuity of the fuse. If no continuity is measured, the fuse has blown. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 137: Repair Procedures

    1 Disconnect all connectors from the ACS digital I/O PCB. 2 Carefully pull the ACS digital I/O PCB and unlatch the PCB supports one by one using a small pair of pliers. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 138 1 Install the ACS digital I/O PCB in the correct location in the switch box. 2 Attach the ACS digital I/O PCB to the PCB supports. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 139 Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 Remove the fuse from the PCB. a Fuse EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 140: Backup Heater

    Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.19 Plate work" [  287]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 141 To perform an insulation check of the backup heater Prerequisite: First perform a resistance check of the backup heater, see "4.4.1 Checking procedures" [  140]. 1 Open all circuit breakers. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 142 2 Activate Installer on the user interface. See the installer reference guide for the correct procedure. 3 Go to Actuator test run via the user interface. 4 Activate backup heater: step 1. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 143 3 With the Actuator test run still active, activate backup heater: step 1. 4 Measure the voltage between the following terminals of the backup heater contactors. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 144 NOT damaged (check continuity), see "7.2 Wiring diagram" [  392]. Are the measured voltages of the Action backup heater contactors correct (contacts closed)? Continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 145 (wiring, faulty contact, …), see "7.2 Wiring diagram" [  392]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 146: Repair Procedures

    Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 147 5 Carefully tilt the support bracket to release it from the notch on the backup heater housing and remove the support bracket. 6 Remove the 2 screws, nuts and washers from the backup heater housing right side support bracket. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 148 1 Correctly install both water piping coupling elbows on the backup heater Pay attention to the alignment. Install the 2 clips to fix the coupling elbows. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 149 Slide the support bracket upwards and rotate it 90° counterclockwise to fix the backup heater housing in the bracket. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 150 13 Install the inlet and outlet water pipe on the backup heater. Install the 2 clips to fix the pipes. NOTICE Check the condition of the O-rings and replace if needed. Apply water or silicon grease to the O-rings before installation. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 151 C 9 kW backup heater a Backup heater contactor K1M b Backup heater contactor K2M c Backup heater contactor K5M 3 To install backup heater contactor(s), "4.4.2  Repair procedures" [  146]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 152: Backup Heater Thermal Protector

    1 Drain water from the water circuit, see "5.3.2 Repair procedures" [  381]. 2 Remove the 2 clips and disconnect the inlet and outlet water pipe from the backup heater. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 153 5 Remove the 2 screws, nuts and washers from the backup heater housing right side support bracket. a Nut + washer b Backup heater housing right side support bracket c Notch (on backup heater housing) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 154 13 Heat the water above 95°C. 14 Measure the temperature of the water. The backup heater thermal protector MUST trip at a temperature of approximately 95°C. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 155 Backup heater thermal protector is OK. Return to the troubleshooting of the specific error and continue with the next procedure. Replace the backup heater thermal protector, see "4.5.2 Repair procedures" [  156]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 156: Repair Procedures

    4 Carefully tilt the support bracket to release it from the notch on the backup heater housing and remove the support bracket. 5 Remove the 2 screws, nuts and washers from the backup heater housing right side support bracket. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 157 11 Open the backup heater switch box. 12 Carefully route the backup heater thermal protector sensor and wiring inside the switch box (through the rubber grommet). a Backup heater thermal protector sensor EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 158 2 Connect the wires to the wire terminals at the back of the backup heater thermal protector. 3 Carefully route the backup heater thermal protector sensor and wiring through the rubber grommet towards the backup heater. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 159 Backup heater housing right side support bracket b Notch (on backup heater housing) c Nut + washer EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 160 13 Open the stop valves and add water to the water circuit if needed, see "5.3.2 Repair procedures" [  381]. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 161: Compressor

    Prerequisite: First perform an auditive check of the compressor, see "4.6.1 Checking procedures" [  161]. Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 162 "4.6.2 Repair procedures" [  166]. To perform an electrical check of the compressor 1 First perform a mechanical check of the compressor, see "4.6.1  Checking procedures" [  161]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 163 NOT 0 Ώ, this value MUST be subtracted from the measured winding resistance. 4 Measure the resistance between the compressor motor windings U-V, V-W and U-W. Result: All measurements MUST be approximately the same. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 164 11 Wait for – or create condition to operate the compressor. 12 Once the compressor operates, measure the U-V-W inverter voltages. ALWAYS measure at the PCB side. Result: All measurements MUST be the same. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 165 3 Disconnect the Faston connectors from the compressor wire terminals U, V and W. INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 166: Repair Procedures

    Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 Remove the 4 bolts and remove the lower cover from the compressor compartment. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 167 4 Install the top left cover in the correct location. Install and tighten the 2 bolts to fix the top left cover. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 168 3 Disconnect the Faston connectors from the compressor wire terminals U, V and W. INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 169 8 Wrap a wet rag around the components near the compressor pipes. Heat the brazing points of the compressor pipes using an oxygen acetylene torch and remove the refrigerant pipes from the compressor pipes using pliers. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 170 Damper 11 Remove the 3 dampers from the compressor. INFORMATION The compressor dampers may look different. 12 Remove the bushings and keep them for re-use. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 171 0.02 MPa. 8 Wrap a wet rag around the compressor pipes and any other components near the compressor and solder the compressor pipes to the refrigerant pipes. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 172 10 Connect the Faston connectors to the compressor wire terminals U, V and W a Faston connector 11 Fix the compressor wiring to the protrusion on the compressor body using a new tie strap. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 173 "5.2.2  Repair procedures" [  368]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 174: Current Sensor

    Replace the current sensor, see "4.7.2 Repair procedures" [  174]. 4.7.2 Repair procedures To remove the current sensor Prerequisite: Stop the unit operation via the user interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 175 3 Slide the current sensor on the power wiring and remove the current sensor. Three phase units 1 Disconnect the power wiring Faston connectors L1A, L2A, L3A and NA from the main PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 176 1 Slide the current sensor on the power wiring LA and NA and install the current sensor in place. 2 Route the power wiring LA and NA to the noise filter PCB. Connect the wiring and tighten the screws. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 177 2 Route the power wiring L1A, L2A, L3A and NA to the main PCB. Connect the wiring (Faston connectors). a L1A b L2A c L3A d NA EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 178: Expansion Valve

    INFORMATION It is highly recommended to perform a power reset after checking the valve using a magnet. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 179 ▪ Connector pin 4‑5. 1 2 3 4 5 a Connector ▪ Connector pin 1‑6, ▪ Connector pin 2‑6, ▪ Connector pin 3‑6, ▪ Connector pin 4‑6. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 180 6 Wait for the PCB to command the expansion valve to open (when closed) or to close (when open) (pulse output to expansion valve visible on service monitoring tool). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 181: Repair Procedures

    Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 If needed, remove any parts or insulation to create more space for the removal. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 182 4 Wrap a wet rag around the components near the expansion valve pipes. Heat the brazing points of the expansion valve pipes using an oxygen acetylene torch and remove the expansion valve pipes from the refrigerant pipes using pliers. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 183 CAUTION Overheating the valve will damage or destroy it. 7 After soldering is done, stop the nitrogen supply after the component has cooled‑down. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 184 Expansion valve body 2 Route the expansion valve coil harness towards the appropriate PCB. 3 Connect the expansion valve coil connector to the appropriate PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 185: Flash Pcb

    Result: The measured voltage MUST be 230 V AC. a L1 Is the measured voltage on the PCB Action correct? No further checks available. Continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 186: Repair Procedures

    To install the flash PCB 1 Install the flash PCB on its correct location. 2 Latch the PCB supports using a small pair of pliers to fix the PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 187: High Pressure Switch

    6 Measure the resistance between the Faston connector (disconnected from S2PH) and pin 1 of connector X2A. 7 Compare the result with the trigger and reset conditions of the high pressure switch (graphic below). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 188 2 Fill the refrigerant circuit with nitrogen until pressurized just below operating pressure of the high pressure switch. a High pressure switch protection control b Pressure EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 189 12 Measure the resistance between the pin 1 of connector X2A and the pin 2 of connector X32A. Result: The switches (S1PH and S2PH) MUST be closed. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 190: Repair Procedures

    High pressure switch S1PH b High pressure switch pipe EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 191 4 Wrap a wet rag around the high pressure switch and any other components near the high pressure switch and solder the high pressure switch pipe to the refrigerant pipe. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 192 8 For S1PH ONLY: install new tie straps to fix the high pressure switch harness. 9 Perform a pressure test, see "5.2.1 Checking procedures" [  365]. 10 Add refrigerant refrigerant circuit, "5.2.2  Repair procedures" [  368]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 193: Hydro Pcb

    3 Turn ON the power of the unit. 4 Measure the voltage on the connectors X1A: 1‑3 and X19A: 1‑3 on the hydro PCB. Result: The measured voltage MUST be 230 V AC. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 194 To check the HAP LED of the hydro PCB Prerequisite: First check the power supply to the hydro PCB, see "4.11.1 Checking procedures" [  193]. 1 Locate the HAP LED on the hydro PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 195 To check the wiring of the hydro PCB Prerequisite: First perform all earlier hydro PCB checks, see "4.11.1  Checking procedures" [  193]. Prerequisite: Stop the unit operation via the user interface. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 196 Return to "4.11.1 Checking procedures" [  193] of the hydro PCB and continue with the next procedure. Problem solved? After all checking procedures listed above have been performed: EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 197: Repair Procedures

     287]. 2 Remove the 2 screws and tilt the terminal bar to create access to the top side of the PCB’s. a Screw b Terminal bar EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 198 To install the hydro PCB 1 Install the hydro PCB in the correct location in the switch box. 2 Correctly install the hydro PCB on the PCB supports. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 199 To remove a fuse of the hydro PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 200 1 Install the fuse on the correct location on the PCB. CAUTION Make sure the fuse is plugged‑in correctly (contact with the fuse holder). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 201: Hydro Extension Pcb

    1 Remove the required plate work, see "4.19 Plate work" [  287]. 2 Remove the 2 screws and tilt the terminal bar to create access to the top side of the PCB’s. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 202 Continue with the next step. 5 Measure the output voltage between pins 1‑2 on connector X28A on the hydro PCB. Result: The measured voltage MUST be 230 V AC. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 203 Power off / power failure Blinking 0.5 Hz USB detected / software upgrade in progress Blinking 1 Hz Status OK / Normal operation Blinking 2 Hz USB software upgrade error EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 204 PCB and continue with the next procedure. To check the fuse of the hydro extension PCB Prerequisite: First perform all earlier hydro extension PCB checks, see "4.12.1 Checking procedures" [  201]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 205: Repair Procedures

    1 Remove the required plate work, see "4.19 Plate work" [  287]. 2 Remove the 2 screws and tilt the terminal bar to create access to the top side of the PCB’s. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 206 6 To install the hydro extension PCB, see "4.12.2 Repair procedures" [  205]. To install the hydro extension PCB 1 Install the hydro extension PCB in the correct location in the switch box. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 207 Screw Is the problem solved? Action No further actions required. Return to "4.12.1 Checking procedures" [  201] of the hydro extension PCB and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 208 1 Install the fuse on the correct location on the PCB. CAUTION Make sure the fuse is plugged‑in correctly (contact with the fuse holder). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 209: Inverter Pcb

    As the inverter PCB is integrated in the main PCB of the unit, see "4.16  Main PCB" [  226] for the other check procedures. Problem solved? After all checking procedures listed above have been performed: EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 210: Single Fan Outdoor Unit - Three Phase

    3 Remove the 2 screws and remove the beam to create more space for easier access. a Screw b Beam 4 Turn ON the power of the unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 211 Result: All measurements MUST be 400 V AC. ▪ L12B–L22B ▪ L12B–L32B ▪ L22B–L32B Is the measured output voltage on the Action noise filter PCB correct? Continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 212 Prerequisite: First perform a power check of the inverter PCB, see "Checking procedures" [  210]. 1 Locate the HAP LED on the inverter PCB. a HAP LED EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 213 To check the fuses of the inverter PCB Prerequisite: First perform all earlier checks of the inverter PCB, see "Checking procedures" [  210]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 214 2 Cut all tie straps that are fixed to the top beam. 3 Remove the 2 screws and remove the beam to create more space for easier access. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 215 5 Disconnect the Faston connectors from the L12A, L22A and L32A terminals on the inverter PCB. 6 Disconnect all connectors from the inverter PCB. 7 Remove the inverter PCB fixation screws. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 216 6 Connect all connectors to the inverter PCB. INFORMATION Use the wiring diagram and connection diagram for correct installation of the connectors, see "7.2 Wiring diagram" [  392]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 217 Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. 4 Remove the fuse from the PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 218 Fuse Is the problem solved? Action No further actions required. Return to "Checking procedures" [  210] of the inverter PCB and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 219: Leakage Current Pcb

    Correct the wiring between the main PCB and the leakage current PCB, see "5.1.2 Repair procedures" [  364]. Perform a check of the main PCB, see "4.16 Main PCB" [  226]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 220 3 When no earth leak is detected (normal operation), measure the resistance between pins 1‑4 of connector X2A on the leakage current PCB in the following conditions: X1A connector Measurement Connected Short‑circuit Disconnected Open circuit EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 221 PCB and continue with the next procedure. To check the fuses of the leakage current PCB Prerequisite: First perform all earlier checks of the leakage current PCB, see "4.14.1 Checking procedures" [  219]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 222: Repair Procedures

    3 Carefully pull the PCB at the side and unlatch the PCB supports one by one using a small pair of pliers. 4 Remove the leakage current PCB from the main PCB mounting plate. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 223: Low Pressure Switch

    Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 Recuperate the refrigerant from the refrigerant circuit, see "5.2.2  Repair procedures" [  368]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 224 Low pressure switch is OK. Return to the troubleshooting of the specific error and continue with the next procedure. Replace the low pressure switch, see "4.15.2 Repair procedures" [  225]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 225: Repair Procedures

    1 Remove the plug or cap from the refrigerant piping and make sure it is clean. 2 Install the low pressure switch in the correct location. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 226: Main Pcb

    4.16 Main PCB 4.16.1 Single fan outdoor unit - single phase Checking procedures INFORMATION It is recommended to perform the checks in the listed order. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 227 Result: The measured voltage MUST be 230 V AC. 5 Measure the output voltage on connector X98A on the noise filter PCB. Result: The measured voltage MUST be 230 V AC. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 228 To check the HAP LED of the main PCB Prerequisite: First check the power supply to the main PCB, see "Checking procedures" [  226]. 1 Locate the HAP LED on the main PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 229 4 Check that the wiring corresponds with the wiring diagram, see "7.2  Wiring diagram" [  392]. INFORMATION Correct the wiring as needed. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 230 Repair procedures To remove the main PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 231 4 Carefully pull the refrigerant pipe forward and install the main PCB on its mounting plate in the correct location. Install and tighten the fixation screws. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 232 Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 Remove the fuse from the PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 233 1 Install the fuse on the correct location on the PCB. CAUTION Make sure the fuse is plugged‑in correctly (contact with the fuse holder). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 234: Single Fan Outdoor Unit - Three Phase

    Result: All measurements MUST be 400 V AC ± 10%. 4 Measure the voltage between each phase and NA on the main PCB. Result: The measured voltages MUST be 230 V AC ± 10%. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 235 Result: All measurements MUST be 400 V AC ± 10%. 4 Measure the voltage connectors X801A and X802A on the main PCB. Result: The measured voltages MUST be 230 V AC ± 10%. a L1C b L2C EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 236 Correct the wiring between the main PCB and the noise filter PCB, see "5.1.2 Repair procedures" [  364]. Perform a check of the noise filter PCB, "Checking procedures" [  263]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 237 Prerequisite: First check the power supply to the main PCB, see "Checking procedures" [  234]. 1 Locate the HAP LED on the main PCB. A EPRA-DAW1* a HAP LED A EPRA-DBW1* a HAP LED EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 238 3 Measure the output voltage on the connectors X8A: 1‑3, X9A: 1‑3 and X803A: 1‑3 on the main PCB. Result: All measured voltages MUST be 230 V AC±10%. a L11A b L21A c L31A EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 239 Correct the wiring as needed. Is the problem solved? Action No further actions required. Return to "Checking procedures" [  234] of the PCB and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 240  234] of the main PCB and continue with the next procedure. ▪ FOR FUSES F3U~F6U Blown fuse on the main PCB? Action Replace the blown fuse, see "Repair procedures" [  247]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 241 PCB. Result: The measured voltage MUST be 535~560  V  DC when compressor is NOT running. Voltage can be higher when compressor is running. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 242 Result: The measured voltage MUST be approximately 324 V DC when fan is NOT running. Voltage can be higher when fan is running. a + terminal of fan circuit b – terminal of fan circuit EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 243 10 V DC before proceeding. Diode module V1R for compressor circuit 1 Check the diode module in reference with the image and the table below. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 244 0.477 V 0.477 V 0.477 V 0.477 V 0.477 V 0.477 V Diode module V2R for fan circuit 1 Check the diode module in reference with the image and the table below. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 245 Power module V3R for compressor 1 Disconnect the compressor Faston connectors from the main PCB. 2 Check the power module V3R in reference with the image and the table below. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 246 INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 247 Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 248 3 Unplug the compressor U, V and W Faston connectors from the main PCB. 4 Unplug the L1C, L2C and L3C Faston connectors from the main PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 249 1 Install the main PCB on its mounting plate in the correct location. Install and tighten the fixation screws. 2 Connect all Faston connectors to the main PCB. 3 Connect all connectors to the main PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 250 4 Carefully pull the refrigerant pipe forward and install the main PCB in the correct location on the mounting plate. 5 Install and tighten the main PCB fixation screws to fix the PCB on the mounting plate. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 251 11 Plug the L1C, L2C and L3C Faston connectors on the main PCB. 12 Plug the compressor U, V and W Faston connectors on the main PCB. 13 Install the protective cover sheet. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 252 Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 Remove the fuse from the PCB. A EPRA-DAW1* a Fuse F3U b Fuse F4U c Fuse F5U d Fuse F6U EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 253 1 Install the fuse on the correct location on the PCB. CAUTION Make sure the fuse is plugged‑in correctly (contact with the fuse holder). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 254 Fuse F3U b Fuse F4U c Fuse F5U d Fuse F6U A EPRA-DBW1* a Fuse F5U Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 255: Noise Filter Pcb

    3 Lift and pull the cover to remove it from the heat sink. a Heat sink cover screw b Heat sink cover c Wires LC, NC, U, V and W d Ground wire screw EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 256 "5.1.1 Checking procedures" [  361]. Does the unit receive power? Action Correct the wiring from the main power supply terminal to the noise filter PCB, "Repair procedures" [  259]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 257 2 Enter the model name of your unit and check if the installed spare part number corresponds with the spare part number indicated in the webbank. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 258 Prerequisite: First perform all earlier checks of the noise filter PCB, see "Checking procedures" [  255]. 1 Measure the continuity of the fuse. If no continuity is measured, the fuse has blown. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 259 "7.2  Wiring diagram" [  392]. 3 Check the continuity of all wires. 4 Replace any damaged or broken wires. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 260 8 Remove all main PCB mounting plate fixation screws. 9 Pull the refrigerant pipe forward and put the main PCB mounting plate aside so that the PCB's on the back side are easily accessible. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 261 "Repair procedures" [  259]. To install the noise filter PCB 1 Install the noise filter PCB on its correct location. a PCB support b Noise filter PCB EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 262 9 Connect the LC, NC, U, V and W wires to the main PCB and tighten the screws. 10 Connect all connectors to the main PCB. 11 Fix the cables to the main PCB mounting plate using new tie straps. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 263: Single Fan Outdoor Unit - Three Phase

    2 Turn ON the power of the unit. 3 Measure the output voltage of the noise filter PCB between L1C‑L2C‑L3C on the main PCB. Result: All measurements MUST be 400 V AC ± 10%. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 264 5 Measure the power supply voltage to the noise filter PCB between the wires L1‑L2‑L3 on the terminal X1M. Result: All measured voltages MUST be 400 V AC ± 10%. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 265 Result: All measurements MUST be 400 V AC ± 10%. 6 Measure the voltage between each phase and N1B on the noise filter PCB. Result: The measured voltages MUST be 230 V AC ± 10%. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 266 DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 267 Result: All measurements MUST be 400 V AC ± 10%. 10 Measure the voltage between each phase and NA on the noise filter PCB. Result: The measured voltages MUST be 230 V AC ± 10%. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 268 Prerequisite: First check the power supply to the noise filter PCB, see "Checking procedures" [  263]. 1 Measure the voltage between output wires L12B‑L22B‑L32B on the noise filter PCB. Result: All measurements MUST be 400 V AC ± 10%. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 269 Prerequisite: First check the power supply to the noise filter PCB, see "Checking procedures" [  263]. 1 Measure the voltage between output wires L1B‑L2B‑L3B on the noise filter PCB. Result: All measurements MUST be 400 V AC ± 10%. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 270 Is the correct spare part for the noise Action filter PCB installed? Return to "Checking procedures" [  263] of the noise filter PCB and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 271 Prerequisite: First perform all earlier checks of the noise filter PCB, see "Checking procedures" [  263]. 1 Measure the continuity of the fuse. If no continuity is measured, the fuse has blown. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 272 PCB and continue with the next procedure. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 273 2 Cut all tie straps that are fixed to the top beam. 3 Remove the 2 screws and remove the beam to create more space for easier access. a Screw b Beam EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 274 10 V DC before proceeding. 2 Remove the 2 screws from the main PCB heat sink cover. 3 Lift and pull the cover to remove it from the heat sink. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 275 12 Remove the noise filter PCB from the main PCB mounting plate. 13 To install the new noise filter PCB, see "Repair procedures" [  273]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 276 Return to "Checking procedures" [  263] of the noise filter PCB and continue with the next procedure. EPRA-DBW1* 1 Install the noise filter PCB on its correct location. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 277 7 Install the heat sink cover. Close and slide it downwards to fix the 2 hooks. 8 Install and tighten the 2 screws so that the heat sink cover presses the refrigerant pipe. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 278 Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. 1 Remove the fuse from the PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 279 1 Install the fuse on the correct location on the PCB. CAUTION Make sure the fuse is plugged‑in correctly (contact with the fuse holder). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 280: Outdoor Unit Fan Motor

    1 If propeller fan blade touches the bell mounth, check if the fan motor is correctly mounted on its base, see "4.18.2 Repair procedures" [  285]. 2 Check the state of the propeller fan blade assembly for damage, deformations and cracks. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 281 Does not rotate or rotates for a short Continue with the next step. time EPRA-DAV3* INFORMATION The DC fan motor connector MUST be plugged into the appropriate PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 282 Result: The measured voltage should be 0~7 V DC. It should NOT be 0 V DC. Is the measured voltage 0 V DC? Action Perform a check of the main PCB, see "Checking procedures" [  226]. Continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 283 The measured resistance values may deviate from the listed values due to instability during the measurements. DC fan motor resistance measurements Action are correct? Continue with the next step. Replace the DC fan motor, see "4.18.2 Repair procedures" [  285]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 284 Pulses are measured during fan blade Action propeller rotation? Perform a check of the main PCB, see "4.16 Main PCB" [  226]. Replace the DC fan motor, see "4.18.2 Repair procedures" [  285]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 285: Repair Procedures

    Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.19 Plate work" [  287]. 2 Remove the nut that fixes the propeller fan blade assembly. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 286 3 Route the DC fan motor harness through the harness retainers and bend the harness retainers to attach the DC fan motor harness. 4 Install new tie straps to fix the DC fan motor harness. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 287: Plate Work

    "To install the discharge grille" [  292] ▪ "To remove the discharge grille, and put the grille in safety position" [  287] 1 Remove the upper part of the discharge grille. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 288 3 Rotate the lower part of the discharge grille. 4 Align the ball stud and hook on the grille with their counterparts on the unit. 5 Insert the hook. 6 Insert the ball stud. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 289 3 Disconnect the electrical power supply wiring from the wire terminal. 4 Disconnect the power supply wiring and ground wire towards the indoor unit from the wire terminal. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 290 Take care that the thermal interface grease (applied on the heat sink) does NOT smear everything. 16 To install the switch box, see "4.19 Plate work" [  287]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 291 Make sure that the refrigerant pipe is correctly installed on the main PCB heat sink. Do NOT touch the part of the refrigerant pipe that is mounted in the heat sink. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 292 When closing the outdoor unit cover, make sure that the tightening torque does NOT exceed 4.1 N•m. 3× To install the discharge grille Install the lower part of the discharge grille 1 Insert the hooks. 2 Insert the ball studs. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 293 4 Align and attach the left side. 5 Align and attach the middle part. 6 Align and attach the right side. 7 Insert the hooks. 8 Insert the ball studs. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 294: Indoor Unit

    User interface panel b Switch box cover Open 1 Remove the user interface panel. Open the hinges at the top and slide the interface panel downwards. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 295 To lower the switch box of the indoor unit and remove the top cover To lower the switch box Prerequisite: Remove the user interface panel. 1 Loosen the screws. 2 Lift up the switch box. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 296 2× 3 Lower the switch box. 1× To remove the top cover NOTICE The top cover can only be removed if the switch box is lowered. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 297 Do not use force. ▪ Do not use tools. Prerequisite: Remove the top cover, see "4.19 Plate work" [  287]. 1 Remove the thermal insulation in the order shown below: EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 298: Reactor

    1 Check that the reactors are firmly installed on the main PCB. a Reactor 2 Using a megger device of 500 V DC, check the insulation resistance. Make sure there is no earth leakage. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 299 4 Using a megger device of 500 V DC, check the insulation resistance. Make sure there is no earth leakage. Is the measured insulation resistance Action correct? Continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 300 5 Measure the continuity of the reactor. Is the continuity measurement correct? Action Return to the troubleshooting of the specific error and continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 301: Repair Procedures

    Reactor L2R c Reactor L3R d Reactor L4R e Screw 2 Remove the 2 screws that fix the reactor to the main PCB mounting plate. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 302 3 To install the reactor, see "4.20.2 Repair procedures" [  301]. To install the reactor EPRA-DAW1* 1 Install the reactor on the correct location on the main PCB mounting plate. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 303 Return to the troubleshooting of the specific error and continue with the next procedure. EPRA-DBW1* 1 Install the reactor on the correct location on the main PCB mounting plate. a Reactor EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 304: Refrigerant Pressure Sensor

    4 Using the graphic below, determine the expected sensor output voltage based on the pressure obtained in the previous step. -0.5 -0.5 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 305 1.50 1.67 1.83 2.00 2.17 2.33 2.50 2.67 2.83 3.00 3.17 3.33 3.50 3.67 3.83 4.00 4.17 4.33 4.50 4.67 4.83 5.00 5.17 5.33 5.50 5.67 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 306: Repair Procedures

    Heat the brazing point of the refrigerant pressure sensor pipe using an oxygen acetylene torch and remove the refrigerant pressure sensor pipe from the refrigerant pipe using pliers. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 307 4 Wrap a wet rag around the refrigerant pressure sensor and any other components near the pressure sensor and solder the refrigerant pressure sensor pipe to the refrigerant pipe. a Refrigerant pressure sensor EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 308: Solenoid Valve

    "4.22.2 Repair procedures" [  310]. To perform an electrical check of the solenoid valve Prerequisite: First perform a mechanical check of the solenoid valve, see "4.22.1 Checking procedures" [  308]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 309 Action Perform an operation check of the solenoid valve, see "4.22.1 Checking procedures" [  308]. Perform a check of the ACS digital I/O PCB, see "4.3.1 Checking procedures" [  133]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 310: Repair Procedures

    1 For the low pressure by‑pass solenoid valve Y2S and the hot gas by‑pass solenoid valve Y3S ONLY: Remove the screws that fix the solenoid valve to the bracket. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 311 1 Remove the solenoid valve coil, see "4.22.2 Repair procedures" [  310]. 2 Remove the insulation from the solenoid valve pipes (if applicable). Keep for reuse. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 312 6 Wrap a wet rag around the solenoid valve body and any other components near the solenoid valve and solder the solenoid valve body pipes to the refrigerant pipes. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 313 To install the solenoid valve coil 1 Install the solenoid valve coil on the solenoid valve body. a Solenoid valve Y2S b Solenoid valve Y3S c Solenoid valve Y4S EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 314 Replace all cable ties that were cut during removal. Is the problem solved? Action No further actions required. Return to "4.22.1 Checking procedures" [  308] of the solenoid valve and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 315: Thermistors

    (pins) e connector (table) (pins) Main (O/U) X11A:1‑2 thermistor Discharge Main (O/U) X12A:1‑2 pipe thermistor Suction Main (O/U) X12A:3‑4 thermistor Heat Main (O/U) X12A:5‑6 exchanger thermistor EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 316 2.91 –14 139.94 30.06 8.37 2.82 –13 132.28 28.70 8.05 2.72 –12 125.09 27.41 7.75 2.64 –11 118.34 26.18 7.46 2.55 –10 111.99 25.01 7.18 2.47 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 317 6 Measure the resistance between the appropriate pins of the thermistor connector. 7 Check that the measured resistance value matches the resistance determined through the measured temperature (earlier step in the procedure). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 318 Continue with the next step. 8 Disconnect the thermistor from the intermediate connector and measure the resistance of the thermistor (between the appropriate pins of the connector). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 319 - Cut the tie straps that fix the insulation and the thermistor wire. - Cut and remove the insulation. - Pull the clip that fixes the thermistor. - Remove the thermistor from the thermistor holder. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 320 1 Install the thermistor in the thermistor holder as follows: ▪ For air (ambient) thermistor: Correctly install the thermistor in the holder and close the thermistor holder. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 321 3 If connected to an intermediate connector, connect the thermistor connector to the intermediate connector. If directly connected to the PCB, connect the thermistor connector to the appropriate PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 322: Water Side Thermistors

    Is the thermistor correctly installed? Action Perform an electrical check of the specific thermistor, see "Checking procedures" [  322]. Correctly install the thermistor, see "Repair procedures" [  327]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 323 Bizone Outdoor units Name Symbol Location Connector Inter- Reference (PCB) (pins) mediate (table) connector (pins) Inlet water A4P (O/U) X11A: 1‑2 – thermistor (outdoor unit side) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 324 2.91 –14 139.94 30.06 8.37 2.82 –13 132.28 28.70 8.05 2.72 –12 125.09 27.41 7.75 2.64 –11 118.34 26.18 7.46 2.55 –10 111.99 25.01 7.18 2.47 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 325 ▪ Disconnect connector and measure resistance between X11A pin 1‑2: Measured resistance: 21.86 kΩ, ▪ Measured resistance value is inside the range ±10%. R9T thermistor passes the check. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 326 Action thermistor match with the temperature determined resistance? Correct the wiring between the thermistor connector on the PCB and the intermediate connector, see "7.2 Wiring diagram" [  392]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 327 Outdoor units 1 Cut the tie straps that fix the insulation and the thermistor wire. a Tie strap b Insulation c Thermistor wire d Clip e Thermistor EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 328 A Unit without backup heater B Unit with backup heater a R1T (DLWB) b R2T (DLWA) c R5T (DSWW) + R8T (DSWW2) d R7T (DLWA2) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 329 (blocking the thermistor). a Clip b Thermistor c Thermistor holder d Insulation e Thermistor wire f Tie strap EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 330 When installing the water thermistor, push the water thermistor until it bottoms out. A Unit without backup heater B Unit with backup heater a R1T (DLWB) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 331: Other Thermistors

    2 Remove the insulation if needed. Check that the thermistor is correctly installed and that there is thermal contact between the thermistor and the piping or ambient. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 332 2.91 –14 139.94 30.06 8.37 2.82 –13 132.28 28.70 8.05 2.72 –12 125.09 27.41 7.75 2.64 –11 118.34 26.18 7.46 2.55 –10 111.99 25.01 7.18 2.47 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 333 If the measured resistance value matches the resistance determined through the measured temperature, but the temperature for the corresponding thermistor is NOT correct on the user interface display, replace the applicable PCB. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 334 ▪ Three phase units: Inverter (O/ INFORMATION The thermistors may vary according to the specific unit. 3 Determine the thermistor resistance that matches the measured temperature. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 335 4 Measure the resistance between the appropriate connection points of the thermistor. 5 Check that the measured resistance value matches the resistance determined through the measured temperature (earlier step in the procedure). E.g. R11T thermistor: EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 336: User Interface

    It is recommended to perform the checks in the listed order. To check the power supply to the user interface Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 337 "Repair procedures" [  339]. Does the user interface function Action correctly? Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 338 2 Make sure that all wires between the user interface connector X1A and the connector X18A on the hydro PCB are firmly and correctly connected, see "7.2 Wiring diagram" [  392]. 3 Check the continuity of all wires. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 339 PCB. TO REMOVE THE USER INTERFACE DISPLAY Prerequisite: Remove the user interface main PCB. 1 Remove the 2 screws and remove the 2 spacers. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 340 2 Carefully install the user interface main PCB on its PCB supports and make sure the display connector is positioned correctly. 3 Fix the user interface main PCB using the 4 screws. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 341 Return to the troubleshooting of the specific error and continue with the next procedure. To install the software 1 Install the software using the Updater Tool. See the Daikin Business Portal (authentication required) for more information about the Updater Tool. Is the problem solved? Action No further actions required.

  • Page 342: Remote Controller User Interface

    Action Replace the remote controller user interface, see "Repair procedures" [  343]. Correct the wiring between the remote controller and the unit PCB, see "7.2 Wiring diagram" [  392]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 343 To install the user interface 1 See relevant manual of the user interface (remote controller) for the correct procedure. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 344: Water Flow Sensor

    PCB. INFORMATION The flow sensor connector MUST be plugged into X34A on hydro PCB. 8 Using the following formula, calculate the water flow rate: EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 345: Repair Procedures

    1 Remove the required plate work, see "4.19 Plate work" [  287]. 2 Drain the water circuit, see "5.3.2 Repair procedures" [  381]. 3 Loosen the water flow sensor connector nut. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 346 Water flow sensor connector nut b Clip c Water flow sensor 4 Install the water flow sensor on the outlet pipe. Ensure that the O-ring does NOT get damaged. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 347 3 Fix the wiring harness using new tie straps. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 348: Water Pressure Sensor

    Pressure (bar) b Output voltage (V) V DC Detected pressure (bar) 0.00 0.13 0.26 0.40 0.53 0.66 0.80 0.93 1.06 1.20 1.33 1.46 1.59 1.73 1.86 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 349 (power supply) between pins 3–4 on the hydro PCB. Result: The measured voltage MUST be +5 V DC. Is the measured voltage +5 V DC? Action Continue with the next step. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 350: Repair Procedures

    To install the water pressure sensor 1 Install a new O-ring on the water pressure sensor. 2 Install the water pressure sensor in the correct location of the indoor unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 351 3 Connect the other end of the wiring harness to the hydro PCB. 4 Fix the wiring harness using new tie straps. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 352: Water Pump

    3 Check for impurities or any objects that may block the water pump. Any impurities or objects found? Action Remove the impurities or objects that may block the water pump, see "4.27.2 Repair procedures" [  354]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 353 13 Unplug the PWM signal connector from the water pump. 14 Remove the cap from the PWM signal connector and measure the PWM signal between the PWM‑GND. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 354: Repair Procedures

    To remove impurities from the water pump Prerequisite: Remove the water pump, see "4.27.2 Repair procedures" [  354]. 1 Remove any impurities or objects that may block the water pump. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 355 6 To install the water pump motor, see "4.27.2 Repair procedures" [  354]. To install the water pump motor 1 Install the motor on the water pump housing. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 356 3 Remove the internal heat generator circuit 3‑way valve body, see "Repair procedures" [  119]. 4 Remove the clip and remove the space heating inlet pipe (with O-ring installed). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 357 Clip b Pipe c Insulation 9 Remove the insulation from the water pump. 10 Remove the two clips to disconnect the pipes from the water pump. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 358 3 Install both pipes on the water pump. 4 Install the two clips to connect the pipes to the water pump. 5 Install the insulation on the water pump. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 359 14 Open the valve (if equipped) of the water circuit towards the expansion vessel. CAUTION Make sure to open the valve (if equipped) towards the expansion vessel, otherwise the overpressure will be generated. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 360 3 Fix the wiring harness using new tie straps. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 361: Third Party Components

    500  V  DC. All measurements MUST be >1MΩ. If insulation resistance is <1MΩ, earth leakage is present. 4 Turn ON the power using the respective circuit breaker. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 362 2 Check that no connectors or wires are damaged. 3 Check that the wiring corresponds with the wiring diagram, see "7.2  Wiring diagram" [  392]. INFORMATION Correct the wiring as needed. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 363 "7.2  Wiring diagram" [  392]. 3 Check the continuity of all wires. 4 Replace any damaged or broken wires. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 364: Repair Procedures

    Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.19 Plate work" [  287]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 365: Refrigerant Circuit

    Temperature drop found? Action Replace the clogged part, see "5.2.2 Repair procedures" [  368]. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 366 Proper amount Higher degree of overcharge Refrigerant shortage diagnosis 1 The superheated degree of suction gas rises. Consequently, the compressor discharge gas temperature becomes higher than normal. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 367 Return to the troubleshooting of the specific error and continue with the next procedure. Add or recuperate refrigerant until correctly charged, see "5.2.2 Repair procedures" [  368]. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 368: Repair Procedures

    1 Make sure the valves (Y1E, Y3E, Y2S, Y3S, Y4S) are open. If they are not open during refrigerant recovery, refrigerant remains trapped in the unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 369 Vacuum pump b Connect flexible hose to service port c To recovery pump L Low pressure H High pressure V Vacuum R Refrigerant EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 370  371]). 2 Recover refrigerant from the service port (a). 3 To add refrigerant, see "5.2.2 Repair procedures" [  368]. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 371 H1P~H7P 7‑LEDs display BS1~BS4 Push buttons. Operate the push buttons with an insulated stick (such as a closed ballpoint pen) to avoid touching of live parts. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 372 = OFF, = ON, and = flashing. Result: The recovery mode is deactivated. The unit returns the electronic expansion valves / solenoid valves to their initial state. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 373 Action 7-segments display Start from the default situation. Select mode 2. Press and hold BS1 for 5 seconds. Select setting 9. Press BS2 9 times. Select value 2. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 374 Enter the value in the system. Press BS3 once. Confirm. Press BS3 once. Return to the default situation. Press BS1 once. = OFF, = ON, and = flashing. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 375 To protect the environment, make sure to perform the following pump down operation when relocating the unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 376 MUST be reached to allow the evaporation of the moisture will need EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 377: Water Circuit

    Return to the troubleshooting of the specific error and continue with the next procedure. To check the water pressure 1 Turn ON the power of the unit. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 378 To check if the water circuit stop valves are open 1 The stop valves are located outside the unit. Check that all valves are in open position (in line with the piping). EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 379 (underfloor heating, radiators, …) are shut‑off (e.g. for anti‑freeze function). a By‑pass b Underfloor heating (cooling) circuit c Radiators circuit d Indoor or outdoor unit EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 380 If a big temperature difference is measured, an internal pipe obstruction may be present at this location. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 381: Repair Procedures

    2 If impossible to program as such, the external pump needs to be removed from the installation. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 382 (on the building side) to a water tap and to the combined filling and draining valve and secure it against slipping off with a hose clamp. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 383 Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 384 1 Install field installed air purge valves on all highest points of the installation outside the unit. 2 Purge the water circuit, see "5.3.2 Repair procedures" [  381]. Is the problem solved? Action No further actions required. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 385 Space heating (cooling) water circuit Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 386: Manufacturer Components

    1 See the specific dealer manual to check for the correct installation, operation or setting of your component. Does the component function Action correctly? Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 387: Repair Procedures

    2 If needed, Install an anti‑vibration rubber under the indoor unit to filter out the vibrations. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 388 Adjust as needed. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 389: Maintenance

    Prerequisite: Turn OFF the respective circuit breaker. 1 Close the shut‑off valve. 2 Unscrew the bottom cap. a Shut‑off valve b Bottom cap 3 Pull the filter out of the shut‑off valve. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 390 8 Make sure that the air purge valves are in the open position. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 391: Technical Data

    See the installer reference guide on business portal for more information. 7.1.2 Detailed information setting mode: Outdoor unit See the installer reference guide on business portal for more information. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 392: Wiring Diagram

     Bizone mixing kit  Bizone mixing kit  Safety thermostat  Safety thermostat Main LWT Main leaving water temperature  On/OFF thermostat (wired)  On/OFF thermostat (wired)  On/OFF thermostat (wireless)  On/OFF thermostat (wireless) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 393 Safety contactor backup heater # Domestic hot water pump # 2-way valve for cooling mode PC (A15P) * Power circuit Thermal protector backup heater # Safety thermostat EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 394 230 V AC supplied by PCB 230 V AC supplied by PCB Alarm output Alarm output BUH option Backup heater option BUH option only for * Backup heater option only for * EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 395 Space C/H On/OFF output Space cooling/heating On/OFF output SWB1 Switch box (4) Option PCBs (4) Option PCBs Only for demand PCB option Only for demand PCB option EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 396 Only for wireless On/OFF thermostat Only for wireless On/OFF thermostat (6) Backup heater power supply (6) Backup heater power supply Only for *** Only for *** SWB2 Switch box EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 397 Power limitation A8P: X801M: 4-5 user interface communication demand input 4 signal 2 core 2x0.75 Only for LAN adapter A13P: P1-P2 user interface communication 4D132247 D EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 398 CAN HIGH CAN LOW WLAN SD CARD Cartridge A20P BZ mixing kit WLAN UART Interface Debug UART Interface WLAN adapter module option SW3 SW4 SW5 4D132246 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 399 The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. 4D132246C EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 400 DHW pump output Max. load: ext. ambient 2 A (inrush) - 230 V AC sensor option 1 A (continuous) (indoor or outdoor) NC valve 4D132246A Shut-off valve EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 401 *6V3 (1N~, 230 V, 6 kW) for *6WN (3N~, 400 V, 6 kW) and *9WN (3N~, 400 V, 9 kW) only for *3V only for *6V only for *9W 4D132246 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 402 Correct diagrams are supplied with the unit and can also be found in the technical data book. Switch box SWB1 X15M X12M A23P SWB2 K1M K2M 4D132246 EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 403: Wiring Diagram: Outdoor Unit

    (only for EPRA-DAW1* models) Right side view See note *** See note *** Notes: Symbols: Live Neutral Protective earth Noiseless earth Field wiring Option Terminal strip Terminal Connector Connection EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 404 BS1~BS4 (A1P) Push button switch C1~C4 (A1P, A2P) Capacitor DS1 (A1P) DIP switch Drain tube heater (field supply) E1HHEX~E3HHEX Plate heat exchanger heaters Field fuse (field supply) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 405 High pressure sensor S1PH, S2PH High pressure switch S1PL Low pressure switch Current transfo TC (A2P) Signal transmission circuit V1D~V4D (A1P) Diode V1R (A1P) IGBT power module EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 406 K3R (A1P) Magnetic relay (Y3S) K4R (A1P) Magnetic relay (E1HC) K2M, K11M (A2P) Magnetic contactor L1R~L4R Reactor Compressor motor Fan motor PS (A2P) Switching power supply EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 407 Printed circuit board (ACS) BS1~BS3 (A1P) Push button switch C1~C619 (A1P) Capacitor DS1 (A1P) DIP switch Drain tube heater (field supply) E1HHEX Plate heat exchanger heater EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 408 High pressure switch S1PL Low pressure switch SEG* (A1P) 7-segment display Current transfo TC (A1P) Signal transmission circuit V1D~V3D (A1P) Diode V1R, V2R (A1P) Diode module EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 409 Solenoid valve (4‑way valve) Solenoid valve (low pressure bypass) Solenoid valve (hot gas bypass) Solenoid valve (liquid injection) Z1C~Z11C Noise filter (ferrite core) Z1F~Z5F (A1P, A2P) Noise filter EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 410 Correct diagrams are supplied with the unit and can also be found in the technical data book. Electronic component assembly Position of elements Indoor Outdoor Front side view Rear side view EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 411 Correct diagrams are supplied with the unit and can also be found in the technical data book. Electronic component assembly Position of elements Front side view Right side view Rear side view EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 412 SEE NOTE 6 C619 X17A R533 X108A Z8C N=1 t° t° t° t° t° t° t° t° t° Position of compressor terminal R11T Z10C Z9C N=1 2D146515-B EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 413: Piping Diagram

    R2T Thermistor (backup heater – water OUT) R5T, R8T Thermistor (tank) R7T Thermistor (tank - water OUT) S1L Flow switch Screw connection Flare connection Quick coupling Brazed connection EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 414: Piping Diagram: Outdoor Unit

    S1PH High pressure switch (5.6 MPa) S2PH High pressure switch (4.17 MPa) S1PL Low pressure switch S1NPH High pressure sensor Y1E Electronic expansion valve (main) Y3E Electronic expansion valve (injection) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 415 Technical data Y1S Solenoid valve (4-way valve) Y2S Solenoid valve (low pressure bypass) Y3S Solenoid valve (hot gas bypass) Y4S Solenoid valve (liquid injection) EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 416: Component Overview

    3‑way valve (domestic hot water/space heating) M1S When optional backup heater is installed, the fitting holding the thermistor is on the same location but rotated 90° relative to the fitting shown. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 417 Backup heater contactor K2M f Backup heater switch box c Backup heater contactor K5M g Backup heater d Backup heater thermal protector Q1L NOT applicable for 3 kW backup heater. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 418: Component Overview: Outdoor Unit - Single Phase

    Water outlet (to indoor unit) ae Accumulator o Outlet water thermistor R10T af Compressor p Water inlet (from indoor unit) ag Compressor shell thermistor R7T q Inlet water thermistor R9T EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 419: Component Overview: Outdoor Unit - Three Phase

    Heat exchanger o Outlet water thermistor R10T af Accumulator p Water inlet (from indoor unit) ag Compressor q Inlet water thermistor R9T ah Compressor shell thermistor R7T EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 420 Heat exchanger o Outlet water thermistor R10T af Accumulator p Water inlet (from indoor unit) ag Compressor q Inlet water thermistor R9T ah Compressor shell thermistor R7T EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...

  • Page 421: Field Information Report

    Technical data 7.5 Field information report See next page. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 422 In case a problem occurred on the unit which could not be resolved by using the content of this service manual or in case you have a problem which could be resolved but of which the manufacturer should be notified, we advise you to contact your distributor.
  • Page 423 Application information Application (house, apartment, office,…): New project or reimbursement: Heat emitters (radiators / under floor heating / fan coils /…): Hydraulic layout (simple schematic): Unit / Installation information Model name: Serial number: Installation / commissioning date: Software version hydro PCB A1P Software version hydro PCB A5P Software version user interface: Software version outdoor PCB:...

  • Page 424: Service Tools

    Technical data 7.6 Service tools 1 For an overview of the available service tools, check the Daikin Business Portal (authentication required). 2 Go to the tab After-sales support on the left navigation pane and select Technical support. 3 Click the button Service tools. An overview of the available service tools for the different products is shown.

  • Page 425: Field Settings

    Technical data 7.7 Field settings See next page. EPRA14~18D + ETSH/X(B)16P30+50E Service manual Daikin Altherma 3 H HT ECH₂O ESIE22-11A – 2023.06...
  • Page 426 1/19 Field settings table Applicable indoor units ETSH16P30E▲▼ ETSH16P50E▲▼ ETSHB16P30E▲▼ ETSHB16P50E▲▼ ETSX16P30E▲▼ ETSX16P50E▲▼ ETSXB16P30E▲▼ ETSXB16P50E▲▼ Notes (*1) *X* (*2) *H* (*3) (*4) EKECBUA3V (*5) EKECBUA6V (*6) EKECBUA9W BUH less (*7) 300L tank (*8) E model (*E▲) (*9) E7 model (*E▲7) (*10) ▲...
  • Page 427 2/19 Field settings table Breadcrumb Setting name Range, step Default value Room └─ Antifrost 1.4.1 [2-06] Activation 0: No 1: Yes 1.4.2 [2-05] Room setpoint 4~16°C, step: 1°C 8°C └─ Setpoint range 1.5.1 [3-07] Heating minimum 12~18°C, step: 1°C 12°C 1.5.2 [3-06] Heating maximum...
  • Page 428 3/19 Field settings table Breadcrumb Setting name Range, step Default value 2.8.1 [9-01] Heating minimum 15~37°C, step: 1°C 25°C 2.8.2 [9-00] Heating maximum R/W ([2- [2-0C]=2: 0C] ≠ 2) 37~70, step: 1°C R/O ([2- 70°C 0C] = 2) [2-0C]≠2: 37~55, step: 1°C 55°C 2.8.3 [9-03]...
  • Page 429 4/19 Field settings table Breadcrumb Setting name Range, step Default value [0-04] Leaving water value for high ambient temp. for LWT add zone [9-07]~[9-08]°C, step: 1°C cooling WD curve. [2-0C]=0 18°C [2-0C]=1 7°C [2-0C]=2 18°C [0-05] Leaving water value for low ambient temp. for LWT add zone [9-07]~[9-08]°C, step: 1°C cooling WD curve.
  • Page 430 5/19 Field settings table Breadcrumb Setting name Range, step Default value [D-03] Increase around 0°C 0: No 1: increase 2°C, span 4°C 2: increase 4°C, span 4°C 3: increase 2°C, span 8°C 4: increase 4°C, span 8°C [9-04] Overshoot 1~4°C, step: 1°C 1°C (*10) 2°C (*9) [2-06]...
  • Page 431 6/19 Field settings table Breadcrumb Setting name Range, step Default value 7.5.1 High 0,00~990/kWh 1/kWh 7.5.2 Medium 0,00~990/kWh 1/kWh 7.5.3 0,00~990/kWh 1/kWh User settings Gas price 0,00~990/kWh 0,00~290/MBtu 1,0/kWh Installer settings └─ Configuration wizard └─ System 9.1.3.2 [E-03] BUH type 0: no heater (*7) 2: 3V (*4) 3: 6V (*5)
  • Page 432 7/19 Field settings table Breadcrumb Setting name Range, step Default value 9.1.6 [1-01] High ambient temp. for LWT main zone heating WD curve. 10~25°C, step: 1°C 15°C 9.1.6 [1-02] Leaving water value for low ambient temp. for LWT main zone [9-01]~[9-00], step: 1°C heating WD curve.
  • Page 433 8/19 Field settings table Breadcrumb Setting name Range, step Default value 9.1.A [0-07] Low ambient temp. for LWT add zone cooling WD curve. 10~25°C, step: 1°C 20°C └─ Tank 9.1.B.1 [6-0D] Heat up mode 0: Reheat only 3 scheduled reheat 9.1.B.2 [6-0A] Comfort setpoint...
  • Page 434 9/19 Field settings table Breadcrumb Setting name Range, step Default value 9.5.2 [7-06] HP forced OFF 0: Disabled 1: Enabled └─ Balancing 9.6.1 [5-02] Space heating priority 0: Disabled 1: Enabled 9.6.2 [5-03] Priority temperature -15~35°C, step: 1°C 0°C 9.6.3 [5-04] Offset BSH setpoint 0~20°C, step: 1°C...
  • Page 435 10/19 Field settings table Breadcrumb Setting name Range, step Default value 9.9.F [7-07] BBR16 activation* 0: No *BBR16 settings are only visible when the language of the user 1: Yes interface is set to Swedish. └─ Energy metering 9.A.1 [D-08] Electricity meter 1 0: No 1: 0,1 pulse/kWh...
  • Page 436 11/19 Field settings table Breadcrumb Setting name Range, step Default value [0-03] Low ambient temp. for LWT add zone heating WD curve. -40~5°C, step: 1°C -15°C [0-04] Leaving water value for high ambient temp. for LWT add zone [9-07]~[9-08]°C, step: 1°C cooling WD curve.
  • Page 437 12/19 Field settings table Breadcrumb Setting name Range, step Default value [1-0B] What is the desired delta T in heating for the main zone? R/W(*10) 3~10°C, step: 1°C (*9) [2-0D]=2 3~12°C, step: 1°C (*10) R/O (*9) [2-0C] ≠ 2 (Radiator) 5°C [2-0C] = 2 (Radiator) 10°C...
  • Page 438 13/19 Field settings table Breadcrumb Setting name Range, step Default value [3-0D] In case a bizone kit is installed, antiblockage of kit pump(s) and kit 0: Disabled (*10) mixing valve 1: Enabled [4-00] What is the BUH operation mode? 0: Restricted 1: Allowed 2: Only DHW [4-01]...
  • Page 439 14/19 Field settings table Breadcrumb Setting name Range, step Default value [5-0D] Backup heater voltage 0: 230V, 1~ (*4, *5, *7) 2: 400V, 3~ (*6) [5-0E] [6-00] The temperature difference determining the heat pump ON 2~40°C, step: 1°C temperature. 8°C [6-01] The temperature difference determining the heat pump OFF 0~10°C, step: 1°C...
  • Page 440 15/19 Field settings table Breadcrumb Setting name Range, step Default value [8-01] Maximum running time for domestic hot water operation. 5~95 min, step: 5 min 30 min [8-02] Anti-recycling time. 0~10 hour, step: 0,5 hour 0,5 hour [8-03] Booster heater delay timer. 20~95 min, step: 5 min 50 min [8-04]...
  • Page 441 16/19 Field settings table Breadcrumb Setting name Range, step Default value [C-02] Is an external backup heat source connected? 0: Off 1: Direct (SH) 2: Indirect (DHW) (*3) 3: Indirect (DHW + SH) [C-03] Bivalent activation temperature. -25~25°C, step: 1°C 0°C [C-04] Bivalent hysteresis temperature.
  • Page 442 17/19 Field settings table Breadcrumb Setting name Range, step Default value [D-0D] [D-0E] [E-00] Which type of unit is installed? 0: LT split [E-01] Which type of compressor is installed? [E-02] What is the indoor unit software type? R/W (*1) 0: Reversible (*1) R/O (*2) 1: Heating only (*2)
  • Page 443 18/19 Field settings table Breadcrumb Setting name Range, step Default value Bi-zone kit settings 9.P.1 [E-0B] Bi-zone kit installed 0: not installed 1: - 2: Bizone kit installed 9.P.2 [E-0C] Bi-zone system type 0: Without hydraulic separator / no direct pump 1: With hydraulic separator / no direct pump 2: With hydraulic separator / with direct...
  • Page 444 19/19...
  • Page 448 ESIE22-11A 2023.06 Verantwortung für Energie und Umwelt...

Table of Contents