Page 1 Manual No.'10•SR-T-091 TECHNICAL MANUAL INVERTER RESIDENTIAL AIR CONDITIONERS (Split system, air to air heat pump type) Wall mounted type Floor standing type Ceiling concealed type SRK20ZJ-S SRF25ZJX-S SRR25ZJ-S SRK25ZJ-S SRF35ZJX-S SRR35ZJ-S SRK35ZJ-S SRF50ZJX-S SRK50ZJ-S SRK20ZJX-S SRK25ZJX-S SRK35ZJX-S SRK50ZJX-S SRK60ZJX-S Ceiling cassette-4way compact type...
Page 2 '10 • SR-T-091 CONTENTS 1. SPECIFICATIONS ..................(1) Wall mounted type (SRK) ..............(2) Floor standing type (SRF) ..............14 (3) Ceiling concealed type (SRR) .............. 17 (4) Ceiling cassette-4way compact type (FDTC) ........19 2. EXTERIOR DIMENSIONS ................. 21 (1) Indoor units ..................
Page 3 '10 • SR-T-091 '10 • SR-T-091 10. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....111 10.1 Models SRK20～50ZJ-S ..............111 (1) Operation control function by remote controller ........111 (2) Unit ON/OFF button ................112 (3) Auto restart function .................112 (4) Custom cord switching procedure ............112 (5) Flap and louver control ..............113...
Page 4 '10 • SR-T-091 '10 • SR-T-091 (9) Outline of cooling operation ..............143 (10) Outline of automatic operation ............143 (11) Protective control function ..............144 10.4 Models SRR25,35ZJ-S ...............150 (1) Operation control function by remote controller ........150 (2) Unit ON/OFF button ................151 (3) Auto restart function ................151 (4) Custom cord switching procedure...
Page 5: Troubleshooting Flow
'10 • SR-T-091 '10 • SR-T-091 (4) Check of anomalous operation data with the remote controller ..206 (5) Inverter checker for diagnosis of inverter output ........207 (6) Outdoor unit controller failure diagnosis circuit diagram .....208 11.2.2 Troubleshooting flow ..............209 (1) List of troubles ..................209 (2) Troubleshooting ..................210...
Page 6 '10 • SR-T-091 '09•SRK-DB-087D 1. SPECIFICATIONS 1 SPECIFICATIONS (1) Wall mounted type (SRK) Adapted to RoHS directive SRK20ZJ-S Model Item Indoor unit SRK20ZJ-S Outdoor unit SRC20ZJ-S Cooling capacity (1) 2000 (1000 (Min.) ~ 2700 (Max.)) Heating capacity (1) 2700 (1200 (Min.) ~ 3900 (Max.))
Page 7 '09•SRK-DB-087D '10 • SR-T-091 Adapted to RoHS directive SRK25ZJ-S Model Item SRK25ZJ-S SRC25ZJ-S Indoor unit Outdoor unit Cooling capacity (1) 2500 (1000 (Min.) ~ 2900 (Max.)) Heating capacity (1) 3200 (1200 (Min.) ~ 4200 (Max.)) Power supply 1 Phase, 220 ~ 240 V, 50Hz Cooling 0.62 (0.21 ~ 0.88) Power...
Page 8 '09•SRK-DB-087D '10 • SR-T-091 Adapted to RoHS directive SRK35ZJ-S Model Item SRK35ZJ-S SRC35ZJ-S Indoor unit Outdoor unit Cooling capacity (1) 3500 (1000 (Min.) ~ 3800 (Max.)) Heating capacity (1) 4000 (1300 (Min.) ~ 4800 (Max.)) Power supply 1 Phase, 220 ~ 240 V, 50Hz Cooling 1.01 (0.21 ~ 1.24) Power...
Page 9 '10 • SR-T-091 Adapted to RoHS directive SRK50ZJ-S Model Item Indoor unit SRK50ZJ-S Outdoor unit SRC50ZJ-S Cooling capacity (1) 5000 (1600 (Min.)~5500 (Max.)) Heating capacity (1) 5800 (1600 (Min.)~6600 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 1.55 (0.40~2.20) Power consumption Heating...
Page 10 '10 • SR-T-091 Adapted to RoHS directive SRK20ZJX-S Model Item Indoor unit SRK20ZJX-S Outdoor unit SRC20ZJX-S Cooling capacity (1) 2000 (900 (Min.)~3100 (Max.)) Heating capacity (1) 2500 (900 (Min.)~4300 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 0.35 (0.19~0.70) Power consumption Heating...
Page 11 '10 • SR-T-091 Adapted to RoHS directive SRK25ZJX-S Model Item Indoor unit SRK25ZJX-S Outdoor unit SRC25ZJX-S Cooling capacity (1) 2550 (900 (Min.)~3200 (Max.)) Heating capacity (1) 3130 (900 (Min.)~4700 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 0.49 (0.19~0.82) Power consumption Heating...
Page 12 '10 • SR-T-091 Adapted to RoHS directive SRK35ZJX-S Model Item Indoor unit SRK35ZJX-S Outdoor unit SRC35ZJX-S Cooling capacity (1) 3500 (900 (Min.)~4100 (Max.)) Heating capacity (1) 4300 (900 (Min.)~5100 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 0.845 (0.19~1.01) Power consumption Heating...
Page 13 '10 • SR-T-091 Adapted to RoHS directive SRK50ZJX-S Model Item Indoor unit SRK50ZJX-S Outdoor unit SRC50ZIX-S Cooling capacity (1) 5000 (700 (Min.)~6200 (Max.)) Heating capacity (1) 6000 (700 (Min.)~8800 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 1.30 (0.2~2.20) Power consumption Heating...
Page 14 '10 • SR-T-091 Adapted to RoHS directive SRK60ZJX-S Model Item Indoor unit SRK60ZJX-S Outdoor unit SRC60ZIX-S Cooling capacity (1) 6000 (800 (Min.)~6800 (Max.)) Heating capacity (1) 6800 (800 (Min.)~9700 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 1.86 (0.25~2.30) Power consumption Heating...
Page 15 '10 • SR-T-091 (2) Floor standing type (SRF) Adapted to RoHS directive SRF25ZJX-S Model Item Indoor unit SRF25ZJX-S Outdoor unit SRC25ZJX-S Cooling capacity (1) 2500 (900 (Min.)~3200 (Max.)) Heating capacity (1) 3400 (900 (Min.)~4700 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 0.521 (0.19~0.82) Power...
Page 16 '10 • SR-T-091 Adapted to RoHS directive SRF35ZJX-S Model Item Indoor unit SRF35ZJX-S Outdoor unit SRC35ZJX-S Cooling capacity (1) 3500 (900 (Min.)~4100 (Max.)) Heating capacity (1) 4500 (900 (Min.)~5100 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 0.890 (0.19~1.26) Power consumption Heating...
Page 17 '10 • SR-T-091 Adapted to RoHS directive SRF50ZJX-S Model Item Indoor unit SRF50ZJX-S Outdoor unit SRC50ZIX-S Cooling capacity (1) 5000 (700 (Min.)~5500 (Max.)) Heating capacity (1) 6000 (700 (Min.)~7000 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 1.390 (0.2~1.80) Power consumption Heating...
Page 18 '10 • SR-T-091 (3) Ceiling concealed type (SRR) Adapted to RoHS directive SRR25ZJ-S Model Item Indoor unit SRR25ZJ-S Outdoor unit SRC25ZJX-S Cooling capacity (1) 2500 ( 900 (Min.)~3200 (Max.)) Heating capacity (1) 3400 ( 900 (Min.)~4700 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 0.580 ( 0.19~0.82 ) Power...
Page 19 '10 • SR-T-091 Adapted to RoHS directive SRR35ZJ-S Model Item Indoor unit SRR35ZJ-S Outdoor unit SRC35ZJX-S Cooling capacity (1) 3500 ( 900 (Min.)~4100 (Max.)) Heating capacity (1) 4200 ( 900 (Min.)~5100 (Max.)) Power supply 1 Phase, 220~240 V, 50Hz Cooling 1.080 ( 0.19~1.26 ) Power consumption...
Page 20 '10 • SR-T-091 (4) Ceiling cassette-4way compact type (FDTC) Adapted to RoHS directive FDTC25VD Model Indoor unit FDTC25VD Outdoor unit SRC25ZJX-S Item Panel TC-PSA-25W-E Power source 220/230/240V~50Hz Operation data Cooling Heating Nominal capacity 2.55 [ 0.9 (Min.)~3.2 (Max.)] 3.45 [ 0.9 (Min.)~4.7 (Max.)] Power consumption 0.84 Running current...
Page 21 '10 • SR-T-091 Adapted to RoHS directive FDTC35VD Model Indoor unit FDTC35VD Outdoor unit SRC35ZJX-S Item Panel TC-PSA-25W-E Power source 220/230/240V~50Hz Operation data Cooling Heating Nominal capacity 3.6 [ 0.9 (Min.)~4.1 (Max.)] 4.25 [ 0.9 (Min.)~5.1 (Max.)] Power consumption 1.07 1.16 Running current 4.9/4.7/4.5...
Page 22 Symbol Content 14.5 20 35 9.52 3 8" Flare Gas piping Model 12.7 1 2" Flare Liquid piping 6.35 1 4" Flare Hole on wall for right rear piping Hole on wall for left rear piping Drain hose VP16 Outlet for wiring Outlet for piping on both side Wireless remote controller Outlet for down piping...
Page 23 881.9 Symbol Content 59.9 59.9 20.9 Model 20,25,35 9.52 3 8" Flare Gas piping Model 50,60 12.7 1 2" Flare Liquid piping 6.35 1 4" Flare Hole on wall for right rear piping Hole on wall for left rear piping Drain hose VP16 Outlet for wiring...
Page 24 Symbol Content 83.5 156.5 25,35 : 9.52 3 8" Flare 30.5 103.5 Installation plate Gas piping Model 50 : 12.7 1 2" Flare 138.5 211.5 Unit Liquid piping 6.35 1 4" Flare Hole on wall for right rear piping Hole on wall for left rear piping Drain hose VP16 Screw point fasten the indoor unit...
Page 25 30.3 174.4 (Suspension bolts pitch) 11.2 80 40 11.3 203.7...
Page 26 Decorative panel Suspension bolts pitch Symbol Content Gas piping 9.52 3 8" Flare Liquid piping 6.35 1 4" Flare Drain piping VP20 I.D.20,O.D.26 Note 2 Hole for wiring Suspension bolts M10 or M8 Ducting for air outlet Knock out Space for installation and service Control Air return 1000 or more...
Page 27 50.6 Notes 1 It must not be surrounded by walls on the four sides. 390.6 2 The unit must be fixed with anchor bolts. An anchor bolt must not protrude more the 15mm. 3 Where the unit is subject to strong winds, lay it in such a direction that the blower outlet faces perpendicularly to the dominant wind direction.
Page 28 Notes （1） It must not be surrounded by walls on the four sides. Symbol Content （2） The unit must be fixed with anchor bolts. An anchor bolt must not Service valve connection（gas side） φ12.7（1／2"）（Flare） protrude more the 15mm. Service valve connection（liquid side） φ6.35（1／4"）（Flare）...
Page 29 Notes （1） It must not be surrounded by walls on the four sides. Symbol Content （2） The unit must be fixed with anchor bolts. An anchor bolt must not Service valve connection（gas side） φ9.52（3／8"）（Flare） protrude more the 15mm. Service valve connection（liquid side） φ6.35（1／4"）（Flare）...
Page 30 Notes （1） It must not be surrounded by walls on the four sides. Symbol Content （2） The unit must be fixed with anchor bolts. An anchor bolt must not Service valve connection（gas side） φ12.7（1／2"）（Flare） protrude more the 15mm. Service valve connection（liquid side） φ6.35（1／4"）（Flare）...
Page 31 '10 • SR-T-091 (3) Remote controller (a) Wireless remote controller Models SRK, SRF, SRR The wireiess remote controller in the following figure shows for the SRK series. Unit: mm 17.3 Model FDTC (Option parts)
Page 32: Specifications
'10 • SR-T-091 (b) Wired remote controller (option parts) Wiring outlet Cut off the upper thin part of remote control lower case with a nipper or knife, and grind burrs with a file etc. Exposed mounting In case of pulling out In case of pulling out from upper left from center...
Page 33: Circuit Board
Item Description CNE-CNY Connector Fan motor Flap motor Louver motor Humidity sensor Room temp. sensor Heat exch. sensor Diode stack Fuse PRINTED Terminal block CIRCUIT Varistor BOARD HEAT EXCHANGER Mark Color 250V 3.15A Black Blue White Yellow Yellow Green HEAT EXCHANGER DISPLAY WIRELESS...
Page 34 Item Description CNE-CNY Connector Fan motor DISPLAY Flap motor WIRELESS RECEIVER CNX1 Louver motor BACK-UP SW Inlet motor PRINTED CIRCUIT Room temp. sensor BOARD Heat exch. sensor Humidity sensor 50,60 only CNX2 Limit switch Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks...
Page 35 Item Description CNE-CNX2 Connector DISPLAY Fan motor WIRELESS RECEIVER Flap motor BACK-UP SW CNX1 Damper motor AIR SELECTION SW Damper arm motor PRINTED CIRCUIT Room temp. sensor BOARD Heat exch. sensor Humidity sensor CNX2 Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks...
Page 36 CONTROL INTERFACE KIT SC-BIKN-E 250V 0.16A 250V 3.15A PRINTED CIRCUIT BOARD 1 2/N Power source 1 phase 220 - 240 V 50Hz DISPLAY TO OUTDOOR UNIT WIRELESS TO OUTDOOR UNIT RECEIVER POWER WIRES Color Marks Meaning of Marks SIGNAL WIRE Mark Color Mark...
Page 37 Color Marks LED 3 Indication lamp Red-Inspection Terminal block Power source Mark Color CNB Z Connector Drain motor LM1 4 Louver motor mark BK Black F200 203 Fuse Remote controller communication Terminal block Signal line mark Blue address Fan motor Thermistor Remote controller BR Brown Float switch...
Page 38 TO INDOOR UNIT POWER WIRES SIGNAL WIRE PWB ASSY POWER SOURCE POWER 1 220 240V 50Hz 1 220V 60Hz TRANSISTOR 250V 15A R. IN NOISE 250V 20A FILTER S. IN F3 250V 1A CIRCUIT CNFAN 250V 10A TERMINAL BLOCK SWITCHING POWER CIRCUIT CN20S CNTH...
Page 39 POWER SOURCE 1～220ｰ240V 50Hz／1～220V 60Hz TERMINAL PWB ASSY （MAIN） PWB ASSY （SUB） BLOCK POWER TRANSISTOR FUSE （BK）（RD） 250V 20A （BK） ACTIVE 250V 20A 250V 20A （WH）（WH） FILTER （WH）（WH） 3～ UNIT （BK）（BR）（Y／G）（WH）（Y／G） TERMINAL （BK） CNMAIN CNSUB BLOCK...
Page 40 TO INDOOR UNIT POWER WIRES SIGNAL WIRE PWB ASSY POWER T1 T2 POWER SOURCE TRANSISTOR ～220ｰ240V 50Hz／～220V 60Hz t゜ 250V 15A R.IN （BK）（RD） 250V 20A NOISE （WH） FILTER 3～（BK） S.IN （WH） F3 250V 1A （Y／G）（RD） CIRCUIT （Y／G） CNFAN 250V 10A TERMINAL...
Page 41 POWER SOURCE 1～220ｰ240V 50Hz／1～220V 60Hz PWB ASSY （MAIN） TERMINAL PWB ASSY （SUB） BLOCK POWER TRANSISTOR FUSE （BK）（RD） 250V 20A （BK） ACTIVE 250V 20A 250V 20A （WH）（WH） FILTER （WH）（WH） 3～ UNIT （BK）（BR）（Y／G）（WH）（Y／G） TERMINAL （BK） CNMAIN CNSUB BLOCK...
Page 42: Wall Mounted Type (Srk)
'10 • SR-T-091 '09•SRK-DB-087D 4. NOISE LEVEL 4 NOISE LEVEL (1) Wall mounted type (SRK) Condition ISO-T1, JIS C9612 Model SRK20ZJ-S Model SRK20ZJ-S (Indoor Unit) Model SRK20ZJ-S Cooling 33 dB(A) Noise Level Heating 36 dB(A) × ..Cooling Heating 1000...
Page 43 '09•SRK-DB-087D '10 • SR-T-091 Model SRK25ZJ-S Model SRK25ZJ-S Condition ISO-T1, JIS C9612 (Indoor Unit) Model SRK25ZJ-S Cooling 34 dB(A) Noise Level Heating 39 dB(A) × ..Cooling Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC25ZJ-S Cooling 48 dB(A)
Page 44 '09•SRK-DB-087D '10 • SR-T-091 Model SRK35ZJ-S Model SRK35ZJ-S Condition ISO-T1, JIS C9612 (Indoor Unit) Model SRK35ZJ-S 42 dB(A) Noise Cooling Level Heating 43 dB(A) × ..Cooling Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC35ZJ-S Cooling 50 dB(A)
Page 45 '10 • SR-T-091 Model SRK50ZJ-S Condition ISO-T1,JIS C9612 (Indoor Unit) Model SRK50ZJ-S Cooling 46 dB(A) Noise Level Heating 45 dB(A) × ..Cooling Heating (Outdoor Unit) Model SRC50ZJ-S Cooling 51 dB(A) Noise Level Heating 53 dB(A) × ..Cooling Heating 1000 2000 4000...
Page 46 '10 • SR-T-091 Model SRK20ZJX-S Condition ISO-T1,JIS C9612 (Indoor Unit) Model SRK20ZJX-S Noise Cooling 39 dB(A) Level Heating 38 dB(A) × ..Cooling, Heating N 7 0 N 6 0 N 5 0 N 4 0 N 3 0 N 2 0 1000 2000 4000...
Page 47 '10 • SR-T-091 Model SRK25ZJX-S Condition ISO-T1,JIS C9612 (Indoor Unit) Model SRK25ZJX-S Cooling 41 dB(A) Noise Level Heating 41 dB(A) × ..Cooling, Heating N 7 0 N 6 0 N 5 0 N 4 0 N 3 0 N 2 0 1000 2000 4000...
Page 48 '10 • SR-T-091 Model SRK35ZJX-S Condition ISO-T1,JIS C9612 (Indoor Unit) Model SRK35ZJX-S Cooling 43 dB(A) Noise Level Heating 42 dB(A) × ..Cooling, Heating N 7 0 N 6 0 N 5 0 N 4 0 N 3 0 N 2 0 1000 2000 4000...
Page 49 '10 • SR-T-091 Model SRK50ZJX-S Condition ISO-T1,JIS C9612 (Indoor Unit) Model SRK50ZJX-S Cooling 45 dB(A) Noise Level Heating 45 dB(A) × ..Cooling, Heating N 7 0 N 6 0 N 5 0 N 4 0 N 3 0 N 2 0 1000 2000 4000...
Page 50 '10 • SR-T-091 Model SRK60ZJX-S Condition ISO-T1,JIS C9612 (Indoor Unit) Model SRK60ZJX-S Cooling 47 dB(A) Noise Level Heating 45 dB(A) × ..Cooling, Heating N 7 0 N 6 0 N 5 0 N 4 0 N 3 0 N 2 0 1000 2000 4000...
Page 51: Floor Standing Type (Srf)
'10 • SR-T-091 (2) Floor standing type (SRF) Model SRF25ZJX-S Condition ISO-T1, JIS C9612 (Indoor Unit) Model SRF25ZJX-S Cooling 40 dB(A) Noise Level Heating 40 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC25ZJX-S Noise...
Page 52 '10 • SR-T-091 Model SRF35ZJX-S Condition ISO-T1, JIS C9612 (Indoor Unit) Model SRF35ZJX-S Noise Cooling 41 dB(A) Level Heating 41 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC35ZJX-S Cooling 50 dB(A) Noise Level Heating...
Page 53 '10 • SR-T-091 Model SRF50ZJX-S Condition ISO-T1, JIS C9612 (Indoor Unit) Model SRF50ZJX-S Cooling 47 dB(A) Noise Level Heating 47 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC50ZIX-S Cooling 48 dB(A) Noise Level Heating...
Page 54: Ceiling Concealed Type (Srr)
'10 • SR-T-091 (3) Ceiling concealed type (SRR) Model SRR25ZJ-S Condition ISO-T1, JIS C9612 (Indoor Unit) Model SRR25ZJ-S Noise Cooling 40 dB(A) Level Heating 41 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC25ZJX-S Cooling...
Page 55 '10 • SR-T-091 Model SRR35ZJ-S Condition ISO-T1, JIS C9612 (Indoor Unit) Model SRR35ZJ-S Noise Cooling 42 dB(A) Level Heating 43 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC35ZJX-S Noise Cooling 50 dB(A) Level Heating...
Page 56: Ceiling Cassette-4Way Compact Type (Fdtc)
'10 • SR-T-091 (4) Ceiling cassette-4way compact type (FDTC) Model FDTC25VD Condition ISO-T1,JIS C9612 (Indoor Unit) Model FDTC25VD Noise Cooling 38 dB(A) Level Heating 39 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC25ZJX-S Cooling...
Page 57 '10 • SR-T-091 Model FDTC35VD Condition ISO-T1,JIS C9612 (Indoor Unit) Model FDTC35VD Noise Cooling 41 dB(A) Level Heating 43 dB(A) × ..Cooling, Heating 1000 2000 4000 8000 Mid Octave Band frequency (Hz) (Outdoor Unit) Model SRC35ZJX-S Noise Cooling 50 dB(A) Level Heating 50 dB(A)
Page 58 '09•SRK-DB-087D '10 • SR-T-091 5. PIPING SYSTEM 5 PIPING SYSTEM Models SRK20ZJ-S, 25ZJ-S Model SRK35ZJ-S Humidity sensor (HD)
Page 59 '10 • SR-T-091 Model SRK50ZJ-S Model SRK50ZJ-S Cooling cycle Heating cycle Indoor unit Outdoor unit Outdoor air Flare temp. sensor connection Service valve (TH2) (Gas) Discharge pipe temp. sensor Gas pipie Check joint Heat (φ12.7) (TH3) Room temp. Muffler exchanger sensor sensor (Th1)
Page 60 '10 • SR-T-091 Models SRK50ZJX-S,60ZJX-S SRF50ZJX-S Cooling cycle Heating cycle Indoor unit Outdoor unit Outdoor air Flare temp. sensor connection Service valve (TH2) (Gas) Discharge pipe temp. sensor Gas pipie Heat Check joint (TH3) Room temp. (φ12.7) exchanger sensor sensor (Th1) (Th2 Muffler...
Page 61: Selection Chart
'10 • SR-T-091 7. RANGE OF USAGE & LIMITATIONS RANGE OF USAGE & LIMITATIONS Models SRK20,25,35ZJ-S SRK20,25,35ZJX-S SRK50,60ZJX-S SRF25,35ZJX-S SRK50ZJ-S SRF50ZJX-S SRR25,35ZJ-S FDTC25,35VD Item Cooling operation : Approximately 18 to 32℃ D.B. Indoor return air temperature Heating operation : Approximately 10 to 27℃ D.B. (Upper, lower limits) (Refer to the selection chart) Cooling operation : Approximately -15 to 46℃...
Page 62 '09•SRK-DB-087D '10 • SR-T-091 (2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping Piping length [m] Cooling 0.99 0.975 0.965 0.95 0.935 Heating (3) Correction relative to frosting on outdoor heat exchanger during heating Air inlet temperature of 5 or more outdoor unit in °C WB...
Page 63: Capacity Tables
'10 • SR-T-091 8. CAPACITY TABLES (1) Wall mounted type (SRK) Model SRK20ZJ-S Cool Mode Heat Mode Indoor air temp Indoor air temp outdoor Air ﬂow 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Outdoor air temp. Air flow air temp.
Page 64 '10 • SR-T-091 Model SRK50ZJ-S Cool Mode Heat Mode Indoor air temp indoor air temp outdoor Air flow 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Outdoor air temp. Air flow air temp. 16˚CDB 18˚CDB 20˚CDB 22˚CDB 24˚CDB 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB 22˚CWB...
Page 65 '10 • SR-T-091 Model SRK35ZJX-S Cool Mode Heat Mode Indoor air temp indoor air temp outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow Outdoor air temp. Air flow air temp. 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB 22˚CWB 24˚CWB 16˚CDB 18˚CDB 20˚CDB 22˚CDB...
Page 66 '10 • SR-T-091 (2) Floor standing type (SRF) Model SRF25ZJX-S Cool Mode Heat Mode Indoor air temp indoor air temp outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow Outdoor air temp. Air flow air temp. 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB 22˚CWB...
Page 67 '10 • SR-T-091 (3) Ceiling concealed type (SRR) Model SRR25ZJ-S Cool Mode Heat Mode Indoor air temp indoor air temp outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow Outdoor air temp. Air flow air temp. 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB 22˚CWB...
Page 68 '10 • SR-T-091 (4) Ceiling cassette-4way compact type (FDTC) Model FDTC25VD Cool Mode Heat Mode Indoor air temp indoor air temp outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow Outdoor air temp. Air flow air temp. 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB...
Page 69: Application Data
Warming Potential (GWP)=1975. The forced operation by short-circuiting protective device of pressure Models SRK20ZJ-S, 25ZJ-S, 35ZJ-S, 50ZJ-S • Do not run the unit with removed panels or protections. switch and temperature controller or the use of non specified component Touching rotating equipments, hot surfaces or high voltage parts can cause can cause fire or burst.
Page 70 Before installation check that the power supply matches the air conditioner. (Install at location that meets the following conditions, after getting approval from the customer) 6.5 cm minimum from the ceiling Indoor unit Installation board Standard accessories (Installation kit) Where there is no obstructions to the air flow and where the cooled and heated air can be evenly distributed. Q’ty Accessories for indoor unit A solid place where the unit or the wall will not vibrate.
Page 71: Connection Of Refrigerant Pipings
Fixing of indoor unit Since this air conditioner has been designed to collect dew drops on the rear Gutter surface to the drain pan, do not attach the power cord above the gutter. • How to remove the indoor unit from the installation board Latch (2 locations) Installation Steps Wall...
Page 72: Electrical Wiring Work
ELECTRICAL WIRING WORK Installing the air-cleaning filters Screw Preparation of indoor unit 1. Open the air inlet panel and remove the air filters. CAUTION 2. Install the filter holders, with the air-cleaning filters installed in the holders. In case of faulty wiring connection, the indoor unit stops, and In the air conditioner.
Page 73: Selection Of Installation Location
R410A REFRIGERANT USED Models SRK20ZJX-S, 25ZJX-S, 35ZJX-S, 50ZJX-S, 60ZJX-S WALL MOUNTED TYPE AIR CONDITIONER. This instruction manual illustrates the method of installing an indoor unit. RKY012A007 For electrical wiring work, please see instructions set out on the backside. For outdoor unit installation and refrigerant piping, please refer to page 90. A wired remote control unit is supplied separately as an optional part.
Page 74: Installation Of Indoor Unit
 The connection to the fixed wiring of the mains supply must be made via a double pole isolating switch with a contact gap of at least 3mm in each pole. This may cause fire or heating.  When the outdoor unit has a possibility of being overturned or being displaced and fall from its original installation position, the outdoor unit should be ...
Page 75 RKY012A007 Fixing of indoor unit Since this air conditioner has been designed to collect dew drops on the rear Gutter surface to the drain pan, do not attach the power cord above the gutter. Indoor unit  How to remove the indoor unit from the installation board Installation Steps Wall Latch...
Page 76  Cover the indoor unit’s flare-connected joints, after they are checked for a gas leak, with an indoor Wood screw Gas side (ø9.52) : 34.0 - 42.0 N·m (3.4 - 4.2 kgf·m) unit heat insulating material and then wrap them with a tape with an attached insulation pad placed (ø12.7) : 49.0 - 61.0 N·m (4.9 - 6.1 kgf·m) over the heat insulating material’s slit area.
Page 77: Installation Manual For Indoor Unit
(2) Floor standing type (SRF) FLOOR TYPE AIR CONDITIONER RFB012A002A RFB012A002A WARNING R410A REFRIGERANT USED • Do not vent R410A into the atmosphere : R410A is a fluorinated • Do not perform any change of protective device itself or its setup INSTALLATION MANUAL FOR INDOOR UNIT greenhouse gas, covered by the Kyoto Protocol with Global condition.
Page 78: Before Installation
seriously affect the user’s health and safety. insulation and over-current etc. • Locations where drainage cannot run off safely. During operation the refrigerant pipes become extremely hot or extremely • Ensure that no air enters in the refrigerant circuit when the unit is •...
Page 79 RFB012A002A CAUTION During the installation, do not lean on the control box or the display, as they may be damaged. Fixing of indoor unit Install the indoor unit on flat wall. If improperly installed, it may cause abnormal noise and vibration. (Distortion on the wall shall be no larger than 3 mm.) Floor installation Wall installation Secure using upper 2 screws for floor installations.
Page 80: Remote Controller
block Please note that measurement B (protrusion from the flaring block) will vary depending heat insulating material and then wrap them with a Copper pipe Tape ⑩band on the type of a flare tool in use. tape with an attached pipe cover placed over the If a coventional flare tool is used, please use a copper pipe gauge or a similar heat insulating material’s slit area.
Page 81: Ceiling Concealed Type (Srr)
(3) Ceiling concealed type (SRR) FOR MODEL SRR SERIES RJD012A201 WARNING R410A REFRIGERANT USED • Do not vent R410A into the atmosphere : R410A is a fluorinated • Do not perform any change of protective device itself or its setup INSTALLATION MANUAL FOR INDOOR UNIT greenhouse gas, covered by the Kyoto Protocol with Global condition.
Page 82: Indoor Unit
If air enters in the refrigerant circuit, the pressure in the refrigerant circuit This may cause fire or heating. combustible gases can occur. becomes too high, which can cause burst and personal injury. If leaked gases accumulate around the unit, it can cause fire. BEFORE INSTALLATION Necessary tools for the installation work Before installation check that the power supply matches the air conditioner.
Page 83 Liquid Gas s Liquid side pipes Drain hose (Connection opening diameter ø16) INSTALLATION OF INDOOR UNIT Connecting the Drain Hose Securing the ceiling hanging bolts If steel embedded ceiling If wooden ceiling HEAT Drilling of holes in the wall and fixture of sleeve Tapping screw Holes for ceiling hanging bolts Square bars for hanging the air conditioner...
Page 84 Tighten the nuts to the following torque. Gas side Liquid side : 14.0 ~ 18.0 N·m (1.4 ~ 1.8 kgf·m) Drain hose Liquid side pipes Gas side ( 9.52) : 33.0 ~ 42.0 N·m (3.3 ~ 4.2 kgf·m) (Do not turn) (Connection opening diameter ø16) ( 12.7) : 49.0 ~ 61.0 N·m (4.9 ~ 6.1 kgf·m) Securing the ceiling hanging bolts...
Page 85: Ceiling Cassette-4Way Compact Type (Fdtc)
'10 • SR-T-091 (4) Ceiling cassette-4way compact type (FDTC)
Page 86: Installation Of Indoor Unit
'10 • SR-T-091 ① Before installation ③ Preparation before installation D781 l Install correctly according to the installation manual. l If suspension bolt becomes longer, do reinforcement of earthquake resistant. l Confirm the following points: For grid ceiling Unit type/Power supply specification Pipes/Wires/Small parts ...
Page 87 '10 • SR-T-091 ④ ⑥ ⑥ Installation of indoor unit (continued) Drain pipe (continued) 6. Make sure to install the indoor unit horizontally. Confirm the Work procedure Drain tes levelness of the indoor unit with a level gauge or transparent 1.
Page 88 '10 • SR-T-091 ⑥ ⑧ Drain pipe (continued) Panel installation Drain test l After wiring work finished, install the panel on the indoor unit. (see next page) l Refer to attached panel installation manual for details. of drain l After installation of drain pipe, make sure that drain system work in good condition and no water leakage from joint and drain pan.
Page 89 '10 • SR-T-091 PJA012D783...
Page 90 '10 • SR-T-091 * 1 This function is not able to be set with wireless remote controls or simple remote control (RCH-H3). * 2 For setting the swing range of other louvers, return to 1 and proceed same procedure respectively.
Page 91: Installation Of Outdoor Unit
RWC012A030A 9.2 Installation of outdoor unit Model 20 · 25 · 35 Models SRC20ZJ-S, 25ZJ-S, 35ZJ-S R410A REFRIGERANT USED 20ZJX-S, 25ZJX-S, 35ZJX-S • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page 68 or 72. •...
Page 92 CAUTION • Use the circuit breaker with sufficient breaking capacity. • Take care when carrying the unit by hand. • When perform the air conditioner operation (cooling or drying If the breaker does not have sufficient breaking capacity, it can cause If the unit weights more than 20kg, it must be carried by two or more operation) in which ventilator is installed in the room.
Page 93 Notabilia as a unit designed for R410A Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional refrigerant. A cylinder containing R410A has a pink indication mark on the top. A unit designed for R410A has adopted a different size indoor unit operation valve charge port and a different size check joint provided in the unit to prevent the charging of a wrong refrigerant by mistake.
Page 94: Refrigerant Piping Work
2. REFRIGERANT PIPING WORK 1) Restrictions on unit installation and use Check the following points in light of the indoor unit specifications and the installation site. Observe the following restrictions on unit installation and use. Improper installation can result in a compressor failure or performance degradation. Additional refrigerant charge is not required at all.
Page 95 CAUTION Do not apply force beyond proper fastening torque in tightening the flare nut. Fix both liquid and gas operation valves at the valve main bodies as illustrated on the right, and then fasten them, applying appropriate fastening torque. Operation valve size (mm) Tightening torque (N·m) Tightening angle ( ) Recommended length of a tool handle (mm)
Page 96: Drain Piping Work
3. DRAIN PIPING WORK Execute drain piping by using a drain elbow and drain grommets supplied separately as optional parts, where water drained from the outdoor unit is a problem. CAUTION When condensed water needs to be Water may drip where there is a larger amount of drain led to a drain, etc., install the unit on water.
Page 97: After Installation
Power supply terminal block Power cable, indoor-outdoor connecting wires Cable clamp Always perform grounding system installation work with the power cord unplugged. Earth leakage breaker It holds cables in place and protect the terminal (Harmonic resistant type) Always use an earth leakage circuit breaker designed for inverter circuits to CAUTION connection from external force.
Page 98: Installation Manual For Outdoor Unit
RWC012A032 Notabilia as a unit Model SRC50ZJ-S INSTALLATION MANUAL FOR OUTDOOR UNIT • Do not use any refrigeran Model 20·25·35·50 A cylinder containing R41 R410A REFRIGERANT USED • A unit designed for R410 The processed dimension • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to the respective installation manuals supplied with the units. refer to page 68.
Page 99: Haulage And Installation
The bottom plate o • Carry out the electrical work for ground lead with care. Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults such as electric shocks due to short-circuiting. 1 Install the unit o higher than snow CAUTION...
Page 100 • All indoor units must be models designed exclusively for R410A. Check connectable indoor unit models in a catalog, etc. (A wrong indoor unit, if connected into the system, will impair proper system operation) y time. 1. HAULAGE AND INSTALLATION (Take particular care in carrying in or moving the unit, and always perform such an operation with two or more persons.) When a unit is hoisted with slings for haulage, take into consideration the offset of its gravity center position.
Page 101 • Securely install the unit so that it does not fall over during earthquakes or strong winds, etc. • Refer to the above illustrations for information regarding concrete foundations. uipment, • Install the unit in a level area. (With a gradient of 5mm or less.) Improper installation can result in a compressor failure, broken piping within the unit and abnormal noise generation.
Page 102 designed specifically for R410A, conventional flaring tools can also be used by ø6.35 Electrical installation work adjusting the measurement of protrusion B with a protrusion control gauge. ø9.52 Electrical installation work Side cover • Tighten a flare joint securely. ø12.7 •...
Page 103 additionally. NOTE Put down the refrigerant volume calculated from the pipe length onto the caution label attached on the service panel. • For an installation measuring 15m or shorter in pipe length, please charge the refrigerant volume charged for shipment at the factory, when you recharge refrigerant after servicing etc. INSTALLAT 8) Heating and condensation prevention Band (accessory)
Page 104 • When cables are connected, make sure that all electrical components within the electrical component box are free of loose connector coupling or (yellow/green) terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water Section of copper wire (mm penetrates into the box.) •...
Page 105 RWC012A029B Notabilia as a unit d Models SRC50ZIX-S, 60ZIX-S Model 40 · 50 · 60 Do not use any refrigeran A cylinder containing R41 R410A REFRIGERANT USED A unit designed for R410A The processed dimension • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page 72. Accordingly, you are requ •...
Page 106 This may cause fire or electric shock due to defecting contact, (1) If the unit is installed defecting insulation and over-current etc. The bottom plate of u • Carry out the electrical work for ground lead with care. 1 Install the unit on Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead.
Page 107 In charging refrigerant, always take it out from a cylinder in the liquid phase. All indoor units must be models designed exclusively for R410A. Check connectable indoor unit models in a catalog, etc. (A wrong indoor unit, if connected into the system, will impair proper system operation) at any time.
Page 108 Improper installation can result in a compressor failure, broken piping within the unit and abnormal noise generation. he system on equipment, 2. REFRIGERANT PIPING WORK nsects and d cause gs clean. 1) Restrictions on unit installation and use s corroded Check the following points in light of the indoor unit specifications and the installation site.
Page 109 applying appropriate fastening torque. Operation valve size (mm) Tightening torque (N･m) Tightening angle ( ) Recommended length of a tool handle (mm) Use a torque wrench. If a torque wrench is φ6.35 (1/4") 45 60 14 18 not available, fasten the flare nut manually φ12.7 (1/2") 49 61 30 45...
Page 110 ･ Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%. Insulation 3. DRAIN PIPING WORK INSTALLATIO Execute drain piping by using a drain elbow and drain grommets supplied separately as optional parts, where water drained from the outdoor unit is a problem.
Page 111 grounding work. The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables contained in a conduit and a voltage drop is 2%. For an installation falling outside of these conditions, please follow the internal cabling regulations.
Page 112: Outline Of Operation Control By Microcomputer
'09•SRK-DB-087D '10 • SR-T-091 10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER Reference 10.1 Models SRK20 ~ 50ZJ-S 1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote controller 1. Operation control function by remote controller Operation section FAN SPEED button OPERATION MODE select button Each time the button is pressed, the...
Page 113: Auto Restart Function
'09•SRK-DB-087D '10 • SR-T-091 (2) Unit ON/OFF button (a) Operation (b) Details of operation Function Indoor temperature Fan speed Flap/Louver Timer Switch setting operation mode Cooling Thermal dry Heating Unit ON/OFF button (3) Auto restart function Jumper wire (JA1) Jumper wire (JA2) (4) Custom cord switching procedure (a) Modifying the indoor printed circuit board (b) Modifying the wireless remote controller...
Page 114: Flap And Louver Control
'09•SRK-DB-087D '10 • SR-T-091 (5) Flap and louver control (a) Flap (Flap stopped) (Swing) Angle of Flap from Horizontal Remote controller display COOL , DRY, FAN Approx. 10° Approx. 25° Approx. 40° Approx. 50° Approx. 60° Approx. 25° Approx. 40° Approx.
Page 115 '09•SRK-DB-087D '10 • SR-T-091 (6) 3D auto operation Air flow selection Operation mode AUTO < = Indoor temp. – Setting temp. >5°C Indoor temp. – Setting temp. 5°C At cooling HIGH POWER AUTO < = Setting temp. – Indoor temp. >5°C Setting temp.
Page 116: Timer Operation
'09•SRK-DB-087D '10 • SR-T-091 (7) Timer operation (a) Comfortable timer setting (ON timer) (b) Sleep timer operation (c) OFF timer operation (8) Installation location setting (a) Setting If the air conditioning unit is running, press the ON/OFF button to stop. Press the AIR FLOW (UP/DOWN) button and the AIR FLOW...
Page 117: Outline Of Heating Operation
ON(HOT KEEP) Indoor fan motor Outdoor fan motor (few minutes ON) 4-way valve (3 minutes ON) (b) Details of control at each operation mode (pattern) 1) Fuzzy operation Model SRK20ZJ-S SRK25ZJ-S SRK35ZJ-S SRK50ZJ-S Fan speed 30~115rps 30~115rps 30~115rps 23~106rps Auto...
Page 118: Outline Of Cooling Operation
Thermostat OFF Failure Compressor Indoor fan motor Outdoor fan motor (few minutes ON) (few minutes ON) 4-way valve (b) Detail of control in each mode (Pattern) Fuzzy operation Model SRK20ZJ-S SRK25ZJ-S SRK35ZJ-S SRK50ZJ-S Fan speed 20~66rps 20~74rps 20~98rps 23~96rps Auto 20~66rps...
Page 119: Protective Control Function
Dehumidifying Indoor air temperature (˚C) 18.0 Heating '10 • SR-T-091 Outdoor air temperature (˚C) When both the indoor and the outdoor air temperatures are in the range “A”, cooling or heating is switched depending on the difference between the setting temperature and the indoor air temperature. When the operation mode has been judged following the change of setting temperature with the remote controller, the hourly judgment of operation mode is cancelled.
Page 120 Detail of operation The lower limit of compressor command speed is set to 30 or 40 (model 50 : 29) rps and even if the calculated result '10 • SR-T-091 becomes lower than that after fuzzy calculation, the speed is kept to 30 or 40 (model 50 : 29) rps. However, when the thermo becomes OFF, the speed is reduced to 0 rps.
Page 121 seconds times second times Reset conditions: '10 • SR-T-091 (e) Heating high pressure control Purpose: Detector: Detail of operation: (Example) Fuzzy 4rps 8rps After lapse of 20 sec. or over After lapse of 20 sec. or over 4rps 8rps Note (1) Value in ( ) are for the model 50. lower limit After lapse of 20 sec.
Page 122 that after fuzzy calculation, the speed is kept to 40 rps. However, when the thermo becomes OFF, the speed is reduced to 0 prs. iii) '10 • SR-T-091 rps. Protective control Normal operation Outdoor air temperature(°C) Reset conditions: • Model 50 When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while Operating conditions : the compressor command speed other than 0 rps.
Page 123 Outdoor air temperature(°C) Reset conditions: '10 • SR-T-091 • Model 50 Operating conditions: When the outdoor air temperature (TH2) is lower than 4ºC or higher continues for 30 seconds while the compressor command speed is other than 0 rps. The lower limit compressor command speed is change as shown in the figure belo. Detail of operation: Lower limit 29 rps Normal operation...
Page 124 Current cut Purpose: Detail of operation: '10 • SR-T-091 (k) Outdoor unit failure item 1), 2) is satisfied. Once the unit is stopped by this function, ti is not Indoor fan motor protection '09•SRK-DB-087D (m) Serial signal transmission error protection Purpose: Detail of operation: Rotor lock...
Page 125 Reset conditions: '10 • SR-T-091 Heating (model 50 : 0ºC) Operating conditions: Detail of operation: Reset conditions: (model 50 : 2ºC) Refrigeration cycle system protection Starting conditions When 5 minutes have elapsed after the compressor ON or the completion of the defrost control Other than the defrost control When, after meeting the conditions of a) and b) above, the compressor speed, indoor air temperature (Th1) and indoor heat exchanger temperature (Th2) have met the conditions in the following table for 5 minutes:...
Page 126 '10 • SR-T-091 10.2 Models SRK20~60ZJX-S (1) Operation control function by remote controller S Operation section FAN SPEED button OPERATION MODE select button Each time the button is pressed, the Each time the button pressed, the display is switched over in turn. display is switched over in turn.
Page 127: Auto Restart Function
'10 • SR-T-091 (2) Unit ON/OFF button When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this button may be used to turn the unit on and off. Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. Details of operation The unit will go into the automatic mode in which it automatically determines, from indoor temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes.
Page 128: Flap And Louver Control
'10 • SR-T-091 (5) Flap and louver control   Control the flap and louver by AIRFLOW (UP/DOWN) and (LEFT/RIGHT) button on the wireless remote controller.   Flap   Each time when you press the AIRFLOW (UP/DOWN) button the mode changes as follows. (Flap stopped) (Swing) Angle of Flap from Horizontal...
Page 129 '10 • SR-T-091 (6) 3D auto operation Control the flap and louver by 3D AUTO button on the wireless remote controller. Air flow selection and air flow direction are automatically controlled, allowing the entire indoor to efficiently conditioned. During Cooling and Heating (Including auto cooling and heating) Air flow selection is determined according to indoor temperature and setting temperature.
Page 130: Timer Operation
'10 • SR-T-091 (7) Timer operation Comfortable timer setting (ON timer) If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the indoor temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
Page 131: Outline Of Heating Operation
'10 • SR-T-091 (9) Outline of heating operation Operation of major functional components in heating mode Heating Thermostat ON Thermostat OFF Failure Compressor ON(HOT KEEP) Indoor fan motor Outdoor fan motor (few minutes ON) 4-way valve (3 minutes ON) Details of control at each operation mode (pattern) Fuzzy operation Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed.
Page 132: Outline Of Cooling Operation
'10 • SR-T-091 During continuous compressor operation In addition, when the speed command from the indoor controller of the indoor unit during heating operation has counted 0 rps 10 times or more and all conditions of a), b), c) and e) above and the outdoor air temperature is 3ºC or less are satisfied (note that when the temperature for outdoor heat exchanger sensor (TH1) is －...
Page 133: Protective Control Function
'10 • SR-T-091 The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previous operation mode, changes the operation mode. When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
Page 134 '10 • SR-T-091 Cooling high pressure control Purpose: Prevents anomalous high pressure operation during cooling. Detector: Outdoor heat exchanger sensor (TH1) Detail of operation: (Example) Fuzzy After lapse of 30 sec. or over 6rps 6rps After lapse of 30 sec. or over lower limit After lapse of 30 sec.
Page 135 '10 • SR-T-091 Heating high pressure control Purpose: Prevents anomalous high pressure operation during heating. Detector: Indoor heat exchanger sensor (Th2) Detail of operation: (Example) Fuzzy 4rps 8rps After lapse of 20 sec. or over 4rps 8rps After lapse of 20 sec. or over lower limit After lapse of 20 sec.
Page 136 '10 • SR-T-091 Heating low outdoor temperature protective control • Model 20~35 Operating conditions:　 When the outdoor air temperature (TH2) is lower than - 10ºC or higher continues for 30 sec- onds while the compressor command speed is other than 0 rps. Detail of operation:　　...
Page 137 '10 • SR-T-091 (4) Lower limit speed Item Cooling Heating Model 20~35 20 rps 30 rps Lower Limit Speed 50, 60 25 rps 32 rps If the temperature of 110ºC (models 50, 60 : 115ºC) is detected by the sensor on the discharge pipe, then the compres- sor will stop immediately.
Page 138 '10 • SR-T-091 Outdoor fan control at low outdoor temperature Cooling ◆ Operating conditions: When the outdoor air temperature (TH2) is 22ºC or lower continues for 30 seconds while the compressor command speed is other than 0 rps. Detail of operation: After the outdoor fan operates at A speed for 60 seconds; the corresponding outdoor heat exchanger temperature shall implement the following controls.
Page 139: Unit Display Section
'10 • SR-T-091 10.3 Models SRF25~50ZJX-S (1) Operation control function by remote controller Operation section Model All models FAN SPEED button OPERATION MODE select button Each time the button is pressed, the Each time the button pressed, the display is switched over in turn. display is switched over in turn.
Page 140: Auto Restart Function
'10 • SR-T-091 (2) Unit ON/OFF button When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this button may be used to turn the unit on and off. (a) Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. (b) Details of operation The unit will go into the automatic mode in which it automatically determines, from indoor temperature (as detected by sen- sor), whether to go into the cooling, thermal dry or heating modes.
Page 141: Flap Control
'10 • SR-T-091 (5) Flap control   Control the flap by AIRFLOW (UP/DOWN) button on the wireless remote controller. Flap   Each time when you press the AIRFLOW (UP/DOWN) button the mode changes as follows. (Flap stopped) (Swing) Angle of Flap from Horizontal Remote controller display...
Page 142: Timer Operation
'10 • SR-T-091 Auto air outlet selection COOL, DRY operation In case both lower and upper outlets operation is selected in Cooling or Dry operation, both outlets will be kept for sixty minutes after the start or until indoor temperature is below the setting point. And then the air outlet will change to the upper outlet.
Page 143 '10 • SR-T-091 Defrosting operation Starting conditions (Defrosting operation can be started only when all of the following conditions are met.) After start of heating operation When it elapsed 45 (model 50 : 35) minutes. (Accumulated compressor operation time) After end of defrosting operation When it elapsed 45 (model 50 : 35) minutes.
Page 144: Outline Of Cooling Operation
'10 • SR-T-091 (9) Outline of cooling operation Operation of major functional components in Cooling mode Cooling Thermostat ON Thermostat OFF Failure Compressor Indoor fan motor Outdoor fan motor (few minutes ON) (few minutes ON) 4-way valve Detail of control in each mode (Pattern) Fuzzy operation During the fuzzy operation, the air flow and the compressor speed are controlled by calculating the difference between the indoor temperature setting correction temperature and the retum air temperature.
Page 145: Protective Control Function
'10 • SR-T-091 (11) Protective control function Frost prevention control (During cooling or dehumidifying) Operating conditions Indoor heat exchanger temperature (Th2) is lower than 5ºC. compressor command 5 minutes after reaching the compressor command speed except 0 rps. speed Detail of anti-frost operation Lower limit Indoor heat exchanger...
Page 146 '10 • SR-T-091 Cooling low outdoor temperature protective control Operating conditions: When the outdoor air temperature (TH2) is 22ºC or lower continues for 20 seconds while the compressor command speed is other than 0 rps. Detail of operation: The lower limit of the compressor command speed is set to 44 (30) rps and even if the speed becomes lower than 44 (30) rps, the speed is kept to 44 (30) rps.
Page 147 '10 • SR-T-091 Model 50 Unit : ºC RPSmin < 88 48.5 88 < = RPSmin < 108 51.5 53.5 56.5 108 < = RPSmin 46.5 48.5 51.5 Note (1) RPSmin: The lower one between the outdoor speed and the compressor command speed Heating overload protective control Operating conditions: When the outdoor air temperature (TH2) is 22ºC (model 50 : 17ºC) or higher continues for 30 seconds while the compressor command speed other than 0 rps.
Page 148 '10 • SR-T-091 Compressor overheat protection Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor overheat. Detail of operation Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe. (Example) Fuzzy 4 rps After lapse of 3 min.
Page 149 '10 • SR-T-091 (m) Serial signal transmission error protection Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals. Detail of operation: If the compressor is operating and a serial signal cannot be received from the indoor control with outdoor control having serial signals continues for 7 minute and 35 seconds, the compressor is stopped.After the compressor has been stopped, it will be restarted after the compressor start delay if a serial signal can be received again from the indoor control.
Page 150 '10 • SR-T-091 Refrigeration cycle system protection Starting conditions When 5 minutes have elapsed after the compressor ON or the completion of the defrost control Other than the defrost control When, after meeting the conditions of a) and b) above, the compressor speed, indoor air temperature (Th1) and in- door heat exchanger temperature (Th2) have met the conditions in the following table for 5 minutes: Indoor air temperature (Th1)/ Operation mode...
Page 151: Models Srr25,35Zj-S
'10 • SR-T-091 10.4 Models SRR25,35ZJ-S (1) Operation control function by remote controller Operation section Operation section Model All models Model All models FAN SPEED button OPERATION MODE select button Each time the button is pressed, the Each time the button pressed, the FAN SPEED button OPERATION MODE select button display is switched over in turn.
Page 152: Auto Restart Function
TIMER light (yellow) Illum Illuminates during TIMER operation. '10 • SR-T-091 Illum (2) Unit ON/OFF button When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this button may be used to turn the unit on and off. Operation Push the button once to place the unit in the automatic mode.
Page 153: Timer Operation
'10 • SR-T-091 (5) Timer operation Comfortable timer setting (ON timer) If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the indoor temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
Page 154: Outline Of Cooling Operation
'10 • SR-T-091 Models 20～35 Model 50 Defrost operation Defrost operation start start Outdoor air temperature (℃) Outdoor air temperature (℃) During continuous compressor operation In addition, when the speed command from the indoor controller of the indoor unit during heating operation has counted 0 rps 10 times or more and all conditions of a), b), c) and e) above and the outdoor air temperature is 3°C or less are satisfied (note that when the temperature for outdoor heat exchanger sensor (TH1) is -5°C or less: 62 rps or more, -4°C or less: less than 62 rps), defrost operation is started.
Page 155: Outline Of Automatic Operation
'10 • SR-T-091 (8) Outline of automatic operation Determination of operation mode The unit checks the indoor air temperature and the outdoor air temperature, determines the operation mode, and then begins in the automatic operation. Cooling 27.5 25.5 Dehumidifying Indoor air temperature (˚C) 19.5 Heating Outdoor air temperature (˚C)
Page 156 '10 • SR-T-091 Cooling overload protective control Operating conditions: When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41ºC or more, or 47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
Page 157 '10 • SR-T-091 Reset conditions: When either of the following condition is satisfied The outdoor air temperature (TH2) is D ˚C or higher. The compressor command speed is 0 rps. Heating high pressure control Purpose: Prevents anomalous high pressure operation during heating. Detector: Indoor heat exchanger sensor (Th2) Detail of operation: (Example) Fuzzy...
Page 158 '10 • SR-T-091 Heating low outdoor temperature protective control Operating conditions:　 When the outdoor air temperature (TH2) is lower than - 10ºC or higher continues for 30 sec- onds while the compressor command speed is other than 0 rps. Detail of operation:　　 The lower limit compressor command speed is change as shown in the figure below. Lower limit 45 rps Normal operation Outdoor air temperature (°C)
Page 159 '10 • SR-T-091 Outdoor unit failure This is a function for determining when there is trouble with the outdoor unit during air conditioning. The compressor is stopped if any one of the following in item 1), 2) is satisfied. Once the unit is stopped by this function, it is not restarted.
Page 160 '10 • SR-T-091 Heating ◆ 1) Operating conditions: When the outdoor air temperature (TH2) is 4ºC or lower continues for 30 seconds while the compressor command speed is other than 0 rps. Detail of operation: The outdoor fan is stepped up by 2 speed step at each 20 seconds. (Upper limit 8th speed) Reset conditions: When either of the following conditions is satisfied The outdoor air temperature (TH2) is 6ºC or higher.
Page 161: Models Fdtc25,35Vd
'10 • SR-T-091 10.5 Models FDTC25,35VD (1) Remote controller (Option parts) Wired remote controller The figure below shows the remote controller with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation Characters displayed with dots in the liquid crystal display area are abbreviated.
Page 162 '10 • SR-T-091 Wireless remote controller Indication section Indicates set temperature. Indicates the status of swing louver. Indicates selected operation with Indicates the selected airflow volume Indicates for two seconds when FILTER button is pressed. Indicates when ON-TIMER is set. Indicates when OFF-TIMER is set.
Page 163: Operation Control Function By The Wired Remote Controller
'10 • SR-T-091 (2) Operation control function by the wired remote controller Switching sequence of the operation mode switches of remote controller [CPU reset] This functions when “CHECK” and “GRILL” buttons on the remote controller are pressed simultaneously. Operation is same as that of the power supply reset.
Page 164: Operation Control Function By The Indoor Controller
'10 • SR-T-091 (3) Operation control function by the indoor controller Auto operation If “Auto” mode is selected by the remote controller, the heating and the cooling are automatically switched according to the difference between outdoor air temperature and setting temperature and the difference between setting temperature and return air temperature.
Page 165 '10 • SR-T-091 Timer operation Sleep timer Set the duration of time from the present to the time to turn off the air-conditioner. It can be selected from 10 steps in the range from “OFF 1 hour later” to “OFF 10 hours later”. After the sleep timer setting, the remaining time is displayed with progress of time in the unit of hour.
Page 166 '10 • SR-T-091 Hot keep Hot keep control is performed at the start of the defrost control. Control When the indoor heat exchanger temperature (detected with Th -R1 or R2) drops to 35°C or lower, the speed of indoor fan is changed to the lower tap at each setting. During the hot keep, the louver horizontal control signal is transmitted.
Page 167 '10 • SR-T-091 Automatic louver level setting during heating At the hot start with the heating thermostat OFF, regardless whether the auto swing switch is operated or not (auto swing or louver stop), the louver takes the level position (In order to prevent the cold start). The louver position display LCD continues to show the display which has been shown before entering this control.
Page 168 '10 • SR-T-091 (m) Operation check/drain pump test run operation mode If the power is turned on by the dip switch (SW7-1) on the indoor PCB when electric power source is supplied, it enters the mode of operation check/drain pump test run. It is ineffective (prohibited) to change the switch after turning power on. When the communication with the remote controller has been established within 60 seconds after turning power on by the dip switch (SW7-1) ON, it enters the operation check mode.
Page 169 '10 • SR-T-091 Anomalous fan motor After starting the fan motor, if the fan motor speed is 200rpm or less is detected for 30 seconds continuously and 4 times within 60 minutes, then fan motor stops with the anomalous stop (E16). Plural unit control –...
Page 170 '10 • SR-T-091 Operation permission/prohibition (In case of adopting card key switches or commercially available timers) When the indoor function setting of wired remote controller for “Operation permission/prohibition” is changed from “Invalid (Factory default)” to “ Valid”, following control becomes effective. Optional Card key Blue...
Page 171 '10 • SR-T-091 Remote operation input Remote operation input connector (CnT-6) is provided on the indoor control PCB. However remote operation by CnT-6 is not effective, when “Center mode” is selected by center controller. In case of plural unit (twin, triple, double twin), remote operation input to CnT-6 on the slave indoor unit is invalid. Only the “LEVEL INPUT”...
Page 172 '10 • SR-T-091 Individual operation (Factory default) All units operation (Local setting) Only the unit Only the unit All units in one All units in one directly connected directly connected remote controller remote controller CnT-6 to the remote to the remote system can be system can be controller can be...
Page 173: Operation Control Function By The Outdoor Controller
'10 • SR-T-091 (4) Operation control function by the outdoor controller Defrosting operation Starting conditions (Defrosting operation can be started only when all of the following conditions are met.) After start of heating operation When it elapsed 45 minutes. (Accumulated compressor operation time) After end of defrosting operation When it elapsed 45 minutes.
Page 174 '10 • SR-T-091 (b) Cooling overload protective control Operating conditions: When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41ºC or more, or 47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
Page 175 '10 • SR-T-091 Reset conditions: When either of the following condition is satisfied The outdoor air temperature (TH2) is D ˚C or higher. The compressor command speed is 0 rps. Heating high pressure control Purpose: Prevents anomalous high pressure operation during heating. Detector: Indoor heat exchanger sensor (THI-R) Detail of operation: (Example) Fuzzy...
Page 176 '10 • SR-T-091 Heating low outdoor temperature protective control Operating conditions:　When the outdoor air temperature (TH2) is lower than - 10ºC or higher continues for 30 sec- onds while the compressor command speed is other than 0 rps. The lower limit compressor command speed is change as shown in the figure below. Detail of operation: Lower limit 45 rps Normal operation...
Page 177 '10 • SR-T-091 Outdoor unit failure This is a function for determining when there is trouble with the outdoor unit during air conditioning. The compressor is stopped if any one of the following in item 1), 2) is satisfied. Once the unit is stopped by this function, it is not restarted.
Page 178 '10 • SR-T-091 Refrigeration cycle system protection Starting conditions When 5 minutes have elapsed after the compressor ON or the completion of the defrost control Other than the defrost control When, after meeting the conditions of a) and b) above, the compressor speed, indoor air temperature (Th1) and in- door heat exchanger temperature (Th2) have met the conditions in the following table for 5 minutes: Indoor air temperature (Th1)/ Operation mode...
Page 179: Maintenance Data
'09•SRK-DB-087D '10 • SR-T-091 11 MAINTENANCE DATA Reference Reference 11.1 SRK, SRF and SRR series 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT (1) Cautions (2) Items to check before troubleshooting (3) Troubleshooting procedure (If the air conditioner does not run at all) Important...
Page 180: Troubleshooting Procedure (If The Air Conditioner Runs)
'09•SRK-DB-087D '10 • SR-T-091 (4) Troubleshooting procedure (If the air conditioner runs) 180. 181 ~ 187. 181 ~ 187.
Page 181: Self-Diagnosis Table
'09•SRK-DB-087D '10 • SR-T-091 (5) Self-diagnosis table Wired Indoor unit display panel remote Description Cause Display (flashing) condition controller TIMER of trouble display light light • Broken heat exchanger sensor When a heat exchanger sensor 1 wire disconnection is detected while 1 time operation is stopped.
Page 182: Service Mode (Trouble Mode Access Function)
'09•SRK-DB-087D '10 • SR-T-091 (6) Service mode (Trouble mode access function) (a) Explanation of terms Explanation Term The service mode is the mode where service data are displayed by flashing of the display lights Service mode when the operations in item (b) below are performed with the indoor controller. These are the contents of error displays and protective stops which occurred in the past in the air conditioner system.
Page 183 '09•SRK-DB-087D '10 • SR-T-091 1) Self-diagnosis data Remote controller setting Contents of output data Indicates the number of Remote controller setting occasions previous to the present Temperature setting the error display data are from. 1 time previous (previous time) 21ºC 22ºC 2 times previous 23ºC...
Page 184: Remote Controller Setting
'09•SRK-DB-087D '10 • SR-T-091 (Example) Remote controller setting Operation Displayed data Temperature Fan speed switching switching setting 21ºC Displays the reason for the stop (error code) the previous time an error was displayed. 22ºC Displays the reason for the stop (error code) 2 times previous when an error was displayed. Displays the reason for the stop (error code) 3 times previous when an error was displayed.
Page 185 '09•SRK-DB-087D '10 • SR-T-091 (c) Error code, stop code table Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light light Error coad (10's digit) (1's digit) Normal Can not receive signals for 35 Power supply is faulty.
Page 186 '09•SRK-DB-087D '10 • SR-T-091 (d) Remote controller information tables Display pattern when Display pattern when Fan speed in service mode in service mode Operation switching switching when when there is an there is an RUN light TIMER light abnormal stop abnormal stop (Operation switching) (Fan speed switching)
Page 187 '09•SRK-DB-087D '10 • SR-T-091 (e) Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) Sensor value displayed when the error code is normal Sensor name -64ºC...
Page 188 '09•SRK-DB-087D '10 • SR-T-091 Discharge pipe sensor table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) Sensor value displayed when the error code is normal -64ºC 0.1 sec. If the temperature is < 0, the buzzer sounds. If the temperature is 0, the buzzer does not sound.
Page 189 '09•SRK-DB-087D '10 • SR-T-091 Service data record form 182)
Page 190: Inspection Procedures Corresponding To Detail Of Trouble
'09•SRK-DB-087D '10 • SR-T-091 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Sensor temperature characteristics (Room Discharge pipe sensor temperature characteristics temp., indoor heat exchanger temp., out- door heat exchanger temp., outdoor air temp.) - 10 Temperature (˚C)
Page 191 '09•SRK-DB-087D '10 • SR-T-091 Current cut Compressor lock, Compressor wiring short circuit, Compressor output is open phase, Outdoor PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty. SRC20 ~ 35 : 1.703Ω (U-V, V-W, U-W) or more at 20ºC SRC50ZJ-S : 1.417Ω...
Page 192: Over Heat Of Compressor
'09•SRK-DB-087D '10 • SR-T-091 Over heat of compressor Gas shortage, defective discharge pipe sensor 189) Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB...
Page 193: Outdoor Fan Motor Error
'09•SRK-DB-087D '10 • SR-T-091 Trouble of outdoor unit Insufﬁcient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB Notes (1) Check coil resistance, see page 190. Outdoor fan motor error Defective fan motor, connector poor connection, defective outdoor PCB the fan motor and outdoor Replace outdoor fan motor...
Page 194: Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor
'10 • SR-T-091 Rotor lock Defective compressor, defective outdoor PCB See page 190. (8) Phenomenon observed after shortcircuit, wire breakage on sensor Drain abnormality (SRR only) [Drain piping defective,pump defect, float switch, indoor PCB] (a) Indoor unit Rotor lock Defective compressor, defective Phenomenon Operation Indoor PCB is...
Page 195: Checking The Indoor Electrical Equipment
'09•SRK-DB-087D '10 • SR-T-091 (b) Outdoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Heat exchanger sensor Defrosting is performed for 10 minutes at approx. 45 (models 50, 60 : 35) minutes. Heating Cooling Ourdoor air temperature sensor Defrosting is performed for 10 minutes at approx. 45 (models 50, 60 : 35) minutes. Heating Discharge pipe All modes...
Page 196: How To Make Sure Of Wireless Remote Controller
'09•SRK-DB-087D '10 • SR-T-091 (C) Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] (1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.) If no problems are found, check the output of the power transistor.
Page 197 198. 198. 189.
Page 198 Check point of outdoor unit CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. Color symbol Inspection power transistor Remove the fasten terminal and test output voltage Black Orange Outdoor unit...
Page 199 '09•SRK-DB-087D '10 • SR-T-091 (a) Inspection of electronic expansion valve • Inspection of electronic expansion valve as a separate unit Measuring point Resistance when normal (b) Outdoor unit fan motor check procedure Measuring Resistance when point normal CNFAN Outdoor PCB DC several (4~7V) DC308~336V DC15V...
Page 200: Fdtc Series
'10 • SR-T-091 11.2 FDTC series 11.2.1 Diagnosing of microcomputer circuit Selfdiagnosis function (a) Check indicator table Whether a failure exists or not on the indoor unit can be know by the contents of remote controller error code, indoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
Page 201 '10 • SR-T-091 (ii) Outdoor unit Remote controller Indoor control PCB Reference Location of trouble Description of trouble Repair method Green Error code Red LED Red LED page Installation, operation status • Higher outdoor heat exchanger temperature Repair Replacement, repair Outdoor heat exchanger Keeps •...
Page 202 '10 • SR-T-091 (iv) Display sequence of error codes or inspection indicator lamps ■ Occurrence of one kind of error Displays are shown respectively according to errors. ■ Occurrence of plural kinds of error Section Category of display Error code on remote •...
Page 203: Troubleshooting Procedure
'10 • SR-T-091 ■ Error log and reset Error indicator Memorized error log Reset • Stop the unit by pressing the ON/OFF Remote controller display • Higher priority error is memorized. switch of remote controller. • If the unit has recovered from anomaly, it Red LED on indoor control PCB •...
Page 204 '10 • SR-T-091 • Control PCB PSB012D931F Replace and set up the PCB according to this instruction. ① Set to an appropriate address and function using switch on PCB. 　 Select the same setting with the removed PCB. item switch Content of control Address Plural indoor units control by 1 remote controller...
Page 205 '10 • SR-T-091 • Power PCB PSB012D953A This PCB is a general PCB. Replace the PCB according to this instruction. ① Replace the PCB (refer to right dwg.) 1. Unscrew terminal of the wiring(yellow/green) soldered to PCB from the box. 2.
Page 206 '10 • SR-T-091 ●DIP switch setting list Switches Description Default setting Remarks Address No. setting at plural indoor units control by 1 R/C SW6-1 SW6-2 Model selection As per model See table 1 SW6-3 SW6-4 Normal * /Test run SW7-1 Test run, Drain motor Normal Reserved...
Page 207: Check Of Anomalous Operation Data With The Remote Controller
'10 • SR-T-091 Check of anomalous operation data with the remote Number Data Item controller (Operation Mode) Operation data can be checked with remote control unit operation. (Set Temperature) ➀ Press the button. (Return Air Temperature) The display change “ ”...
Page 208: Inverter Checker For Diagnosis Of Inverter Output
'10 • SR-T-091 Inverter checker for diagnosis of inverter output 　 ●Checking method (a) Setup procedure of checker. Power OFF (Turn off the breaker). Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. Connect the wires U (Red) , V (White) and W (Black) of the checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
Page 209 Models SRC40,50,60ZIX-S Outdoor unit check points ● Check items with the *mark when the power is ON. DC Reactor continuity Check: 50m or higher, less than 100mΩ. Power transistor module check: Is there a short circuit, open Noise filter check: ＊...
Page 210: Troubleshooting Flow
'10 • SR-T-091 11.2.2 Troubleshooting flow List of troubles Remote controller display Description of trouble Reference page None Operates but does not cool. None Operates but does not heat. None Earth leakage breaker activated None Excessive noise/vibration (1/3) None Excessive noise/vibration (2/3) None Excessive noise/vibration (3/3) None...
Page 211: Troubleshooting
'10 • SR-T-091 Troubleshooting Green Error code Content None Operates but does not cool Remote controller: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation. Check the temperature differnce between return and supply air.
Page 212 '10 • SR-T-091 Green Content Error code None Operates but does not heat Remote controller: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation. Check the temperature differnce between return and supply air. It is normal.
Page 213 '10 • SR-T-091 Green Content Error code None Earth leakage breaker activated Remote controller: Stays OFF Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and Replace compressor. coil resistance of compressor? 2.
Page 214 '10 • SR-T-091 Green Content Error code None Excessive noise/vibration (1/3) Remote controller: – – Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient Does time has elapsed after noise/vibration stopping the unit, it is occur during or soon considered that the air- after stopping operation...
Page 215 '10 • SR-T-091 Green Content Error code None Excessive noise/vibration (2/3) Remote controller: – – Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 1/3 Rearrange the piping to Are the pipes avoid contact with the contacting the casing.
Page 216 '10 • SR-T-091 Green Content Error code None Excessive noise/vibration (3/3) Remote controller: – – Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 2/3 If insufficient cooling/ Adjustment heating problem happens during commissioning due to anomalous operating Does noise/vibration occur when the conditions at cooling/ cooling/heating operation is in...
Page 217 '10 • SR-T-091 Green Content Error code Louver motor failure None Remote controller: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure � Check at the indoor unit side. Operate after waiting for more than 1 minute. Does the louver operate at the power 2.
Page 218 '10 • SR-T-091 Green Error code Content Power supply system error Remote controller: None (Power supply to indoor control PCB) Indoor Stays OFF Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between 1 and 2 on the terminal block of indoor unit? AC220/240V...
Page 219 '10 • SR-T-091 Green Content Error code Power supply system error None Remote controller: (Power supply to remote controller) Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't there any Correct. loose connection of remote controller wires? 2.
Page 220: Inspect I/U Error (Connection Of 1-2 Units)
'10 • SR-T-091 Green Content Error code INSPECT I/U INSPECT I/U Remote controller: Keeps flashing Stays OFF Indoor (When 1 or 2 remote controllers are connected) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote controller connected? Set one remote controller Is it set...
Page 221: Inspect I/U Error (Connection Of 3 Units)
'10 • SR-T-091 Green Content Error code INSPECT I/U INSPECT I/U Remote controller: Keeps flashing Stays OFF Indoor (Connection of 3 units or more remote controller) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less. 3 units of remote controller connected? Does remote...
Page 222 '10 • SR-T-091 Green Error code Content Communication error at Remote controller: WAIT initial operation (1/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller LCD displays “ ” 2 WAIT minutes after the power on.
Page 223 '10 • SR-T-091 Green Error code Content Communication error at Remote controller: WAIT initial operation (2/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the fuse is blown, the method to inspect outdoor PCB before replacing the power Isn’t there supply fuse...
Page 224 '10 • SR-T-091 Green Error code Content Communication error at Remote controller: WAIT initial operation (3/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller display is extinguished after the power on. Remote controller display is extinguished after the power on.
Page 225 '10 • SR-T-091 Green Content Error code Remote controller Remote controller: Keeps flashing Stays OFF Indoor communication circuit error 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Malfunction by noise Is it possible to Check peripheral reset normally by the environment.
Page 226 '10 • SR-T-091 Green Content Error code Communication error during operation Remote controller: Keeps flashing 2 times flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Note (1) Inspect faulty connections (disconnection, looseness) on the outdoor unit terminal block. Is the connection of signal Repair signal wires.
Page 227 '10 • SR-T-091 Green Content Error code Indoor heat exchanger Remote controller: temperature thermistor anomaly Keeps flashing 1 time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct. ➞ Insert connector exchanger temperature thermistor securely.
Page 228 '10 • SR-T-091 Green Content Error code Return air temperature Remote controller: thermistor anomaly Keeps flashing 1 time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct. ➞ Connect air temperature thermistor connector.
Page 229 '10 • SR-T-091 Green Content Error code Heating overload operation Remote controller: Keeps flashing 1 time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the air filter clogged? Wash. 2. Error detection method Is the Defective indoor heat indoor heat exchanger exchanger temperature temperature thermistor...
Page 230 '10 • SR-T-091 Green Content Error code Drain trouble Remote controller: Keeps flashing 1 time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the error data in the remote controller. Is there any overflow? 2. Error detection method Float switch is activated Is the Defective indoor control...
Page 231 '10 • SR-T-091 Excessive number of connected Green Content Error code indoor units (more than 17 units) Remote controller: Keeps flashing Stays OFF Indoor by controlling with one remoto controller 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more than 17 Defective remote controller indoor units connected to one ➞...
Page 232 '10 • SR-T-091 Green Content Error code Indoor fan motor anomaly Remote controller: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? 2.
Page 233 '10 • SR-T-091 Green Content Error code Indoor unit operation check, Remote controller: drain motor check setting error Keeps flashing 1 time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Defective indoor control Is SW7-1 PCB (Defective SW7) on the indoor control...
Page 234: Remote Controller
'10 • SR-T-091 Green Content Error code Remote controller Remote controller: temperature thermistor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure 2. Error detection method Is the remote Correct. controller temperature thermistor Is the remote connected properly? controller temperature thermistor Detection of anomalously low...
Page 235 '10 • SR-T-091 Green Error code Content Remote controller: Cooling overload operation Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature Are normal sensor, refer to E37. the characteristics of Replace outdoor heat outdoor heat exchanger...
Page 236 '10 • SR-T-091 Green Content Error code Discharge pipe temperature error Remote controller: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of discharge Are the pipe temperature, refer to E39. characteristics of Replace discharge pipe discharge pipe temperature...
Page 237 '10 • SR-T-091 Green Content Error code Outdoor heat exchanger Remote controller: temperature sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the outdoor heat exchanger temperature Correct connector. sensor connector connected properly? 2.
Page 238 '10 • SR-T-091 Green Content Error code Outdoor air temperature Remote controller: sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the outdoor air Correct connector. temperature sensor connector connected properly? For the characteristics of outdoor air temperature sensor, see the following graph.
Page 239: Discharge Pipe
'10 • SR-T-091 Green Content Error code Discharge pipe Remote controller: temperature sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the discharge pipe temperature sensor Correct connector. connector connected properly? 2. Error detection method For the characteristics of discharge pipe Are the temperature sensor, see the following graph.
Page 240 '10 • SR-T-091 Green Content Error code Remote controller: Current cut (1/2) Indoor control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Power supply Check power supply. voltage OK? 2. Error detection method Are the Open the valves.
Page 241 '10 • SR-T-091 Green Error code Content Current cut (2/2) Remote controller: Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Continue from previous page Is the checked result of power • Defective outdoor transistor module PCB ➞...
Page 242 '10 • SR-T-091 Green Error code Content Remote controller: Active filter voltage error Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Restore normal condition. Is the power supply normal? 2. Error detection method Is voltage Restore normal condition.
Page 243 '10 • SR-T-091 Green Error code Content Remote controller: Outdoor fan motor anomaly Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material intervene Remove foreign matter. in rotational area of fan propeller? 2.
Page 244 '10 • SR-T-091 Green Green Error code Error code Content Content Power transistor anomaly Remote controller: E51 Remote controller: Power transistor error Keeps flashing Stays Off Indoor Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check soldered surfaces on the outdoor control PCB for...
Page 245 '10 • SR-T-091 Green Error code Content Insufficient refrigerant amount Remote controller: or detection of service valve closure Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Open fully. service valve fully opened? Are the connections of indoor heat exchanger and/or return air...
Page 246 '10 • SR-T-091 Green Green Error code Error code Content Content Current safe stop Keeps flashing Stays Off Indoor Current safe stop Remote controller: E58 Remote controller: Indoor Keeps flashing Stays OFF (Model SRC40 - 60) 3 time flash Outdoor ―...
Page 247 '10 • SR-T-091 Green Error code Content Compressor startup failure Remote controller: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Disconnect the outdoor fan motor Compressor does not start at all. connector and try to startup Neither noise nor vibration cannot be heard Does Replace outdoor fan motor...
Page 248 '10 • SR-T-091 Green Error code Content Compressor rotor lock error Remote controller: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Check and correct the power supply voltage power supply voltage Reset the power supply and restart operation. 2.
Page 249: Option Parts
'10 • SR-T-091 12. OPTION PARTS PJA012D729A Installation manual for wired remote controller 12.1 Instullation of wired remote controller (RC-E4) Connect the remote cont terminal block. Connect the terminal of r Read together with indoor unit's installation manual. with the terminal of indoo (X and Y are no polarity) WARNING Wiring route is as shown...
Page 250 '10 • SR-T-091 ote controller Connect the remote controller cord to the Sheath Sheath The range of temperature settin Upper Upper terminal block. When shipped, the range of set tem Connect the terminal of remote controller (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30˚C (55 ~ 86˚F...
Page 251 '10 • SR-T-091 P J A 0 1 2 D 7 2 9 A Sheath The range of temperature setting Upper When shipped, the range of set temperature differs depending on the operation mode as below. Upper case Board Heating : 16 ~ 30˚C (55 ~ 86˚F) Except heating (cooling, fan, dry, automatic) : 18 ~ 30˚C (62 ~ 86˚F) Upper limit and lower limit of set temperature can be changed with remote controller.
Page 252 '10 • SR-T-091 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote controller and indoor unit are connected. As long as they are used in a typical manner, there wiil be no need to change the initial settings. If you would like to change the initial setting marked “...
Page 253 '10 • SR-T-091 Note 1: The initial setting marked “ ” is decided by connected indoor and outdoor unit, and is automatically defined as following table. Function No. Item Default Model "Auto-RUN" mode selectable indoor unit. Remote controller function02 Indoor unit without "Auto-RUN" mode Indoor unit with two or three step of air flow setting Remote controller function06...
Page 254 '10 • SR-T-091 P J A 0 1 2 D 7 2 9 A ly defined as following table. Operation message How to set function nit. Function description: Function No. Stop air-conditioner and press (SET) (MODE) setting description: buttons at the same time for over three seconds, and the flow setting "FUNCTION SET "...
Page 255: Wireles Kit (Fdtc Series : Rcn-Tc-24W-Er)
'10 • SR-T-091 12.2 Wireles kit (FDTC series : RCN-TC-24W-ER) PJA012D758 PJA012D758 Notes : WIRELESS KIT INSTALLATION MANUAL Following functions of FDTC Type-D indoor unit series are not able to be set with this wireess remote controller (RCN-TC-24W-ER). 1. Individual flap control system 2.
Page 256: How To Insert Batteries
'10 • SR-T-091 PJA012D758 Remote controller Wireless remote controller’s operable area 1 Standard reachable area of the signal Installation of the controller holder [condition] Illuminance at the receiver: 300lux (when no lighting is installed within 1m of the receiver in an ordinary office.) Caution Ceiling surface DO NOT install it on the following places...
Page 257: Installation Of Remote Controller
'10 • SR-T-091 12.3 Simple wired remote controller (FDTC series : RCH-E3) Notes : Following functions of Type-D indoor unit series are not able to be set with this simple wired remote controller (RCH-E3). 1. Individual flap control system (for FDTC) 2.
Page 258: Wiring Specifications
'10 • SR-T-091 MITSUBISHI HEAVY INDUSTRIES,LTD. AIR-CONDITIONING & REFRIGERATION SYSTEMS HEADQUARTERS In case of embedding wiring Remote control installation dimensions Wall surface Wiring Wiring outlet Electrical box (In case of embedding wiring) （Prepare on site） 12×7 Slot hole Installation hole 9×4.5 Slot hole （2 places）...
Page 259 '10 • SR-T-091 In case of exposing cord Simple Remote Controller Installation Manual PJZ012D069 Make certain to remove a screw on the bottom surface of the remote controller. Read together with indoor unit's installation manual. WARNING Screw Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the terminal.
Page 260 '10 • SR-T-091 Master/ slave setting when more than one remote controller are used Up to two remote controllers can be connected to one unit (or one group) of indoor unit. Switch Setting Function detail Slave remote controller indoor unit SW1-1 Master remote controller ○...
Page 261 connecting section. Be careful about contact failure. unit. (No polarity of X and Y) 100 - 200m 0.5mm × 2 cores Under 300m 0.75mm × 2 cores Under 400m 1.25mm × 2 cores Mount the upper case for restoring to its former state so as not to crimp the remote controller cord, '10 •...
Page 262 ct failure. “88” blinks on the temperature setting indicator. (blinking for approximately 2 to 10 seconds while × 2 cores data is read) Then, the return air temperature is displayed. When AIR CON NO. is pressed, return × 2 cores to the indoor unit selection display (example, “U 000”).
Page 263: Interface Kit (Sc-Bikn-E)
'10 • SR-T-091 12.4 Interface kit (SC-BIKN-E) RKZ012A088 Safety precautions Before use, please read these Safety Precautions thoroughly before installation. ●All the cautionary items mentioned below are important safety related items to be taken Accessories included in package into consideration, so be sure to observe them at all times. Be sure to check all the accessories included in package.
Page 264 '10 • SR-T-091 Installation of the interface ・Install the interface within the range of the connection cable length (approximately 1.3m) from the indoor unit. Wiring inlet ・Be sure not to extend the connection cable on site. If the connection cable is extended, malfunction may occur. ・Fix the interface on the wall, pillar or the like.
Page 265 '10 • SR-T-091 Functions of CNT connector It is available to operate the air conditioning unit and to monitor the operation status with the external control unit (remote display) by sending the input/output signal through CNT connector on the indoor control PCB. 0.3 mm (Keep the distance between the relay and the CNT terminal within 2 m.)
Page 266 '10 • SR-T-091 Connection of wired remote controller Regarding the connection of wired remote controller, refer to the instruction manual of wired remote controller. ①Switch ON the DIP switch SW2-2 (Factory setting : ON) on the interface PCB. DIP suitch Caution:Wireless remote controller attached to the indoor unit can be used in parallel, after connecting the wired remote controller.
Page 267: Super Link E Board (Sc-Adna-E)
'10 • SR-T-091 12.5 Super link E board (SC-ADNA-E) SL2NA-E, and SL3N-AE/BE to control...
Page 268 '10 • SR-T-091...
Page 269: Ducted Type (Srrm) Optional Parts
'10 • SR-T-091 12.6 Ducted type (SRRM) optional parts Table of optional parts Bottom air inlet grille set Rear inlet filter set Duct joint for air outlet plate Drain up kit RTS12 RBF12 RFJ22 RDU12E (1) Bottom air inlet grille set (a) Part No.: RTS12 (b) Parts list Name Qty. Air inlet grille Duct for air inlet grille Tapping screw Pan-head screws (c) Installation...
Page 270 '10 • SR-T-091 (2) Rear inlet filter set Pan-head screw (a) Part No.: RBF12 Indoor unit Filter set (b) Installation Bracket for filter fixing Hanger metal Do not use this filter set alone. There are two inlet ports: lower inlet port (normal) and rear inlet port. 1) Detach the rear panel and the hanger metal screwad onto the rear Tappping screw panel from an indoor unit.
Page 271 '10 • SR-T-091 Air flow and external static pressure characteristics (Heating: Hi) ◆ Heating <Hi> Heating <Hi> SRRM25ZE-S SRRM35ZE-S Cooling <Hi> Cooling <Hi> Air flow (m /min) Air flow (m /min) Heating <Hi> Heating <Hi> SRRM50ZE-S SRRM60ZE-S Cooling <Hi> Cooling <Hi> Air flow (m /min) Air flow (m /min) Air inlet grille air flow and friction loss characteristics ◆...
Page 272 Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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