Table Of Contents - Mitsubishi Electric PURY-P72 Service Handbook

Table of Contents

Safety Precautions2
Before Installing The Unit5
Before The Test Run7
Table Of Contents8
Read Before Servicing8
Iii Outdoor Unit Components8
Iv Remote Controller8
V Electrical Wiring Diagram8
Vi Refrigerant Circuit8
Vii Control8
Viii Test Run Mode8
I Read Before Servicing12
Necessary Tools And Materials13
Piping Materials14
Storage Of Piping16
Pipe Processing16
Brazing17
Air Tightness Test18
Vacuum Drying (Evacuation)19
Refrigerant Charging21
Remedies To Be Taken In Case Of A Refrigerant Leak21
Characteristics Of The Conventional And The New Refrigerants22
Notes On Refrigerating Machine Oil23
Restrictions24
System Configuration26
Types And Maximum Allowable Length Of Cables27
Switch Settings And Address Settings28
M-Net Address Settings29
Power Supply Switch Connector Connection On The Outdoor Unit31
Settings For The Centralized Control Switch For The Outdoor Unit31
Selecting The Position Of Temperature Detection For The Indoor Unit31
Various Start-Stop Controls (Indoor Unit Settings)32
Various Types Of Control Using Input-Output Signal Connector32
Demand Control34
Contact Input And Control Content34
Sample System Connection35
An Example Of A System To Which An Ma Remote Controller Is Connected37
Group Operation Of Units In A System With Multiple Outdoor Units41
Address Setting Method46
A System With Multiple Bc Controller Connections47
An Example Of A System To Which An Me Remote Controller Is Connected51
An Example Of A System To Which Both Ma Remote Controller And Me Remote Controller Are Connected53
Restrictions On Pipe Length56
Refrigerant Pipe Size62
Connecting The Bc Controller63
Size Of The Pipe That Fits The Main Bc Controller Ports65
Size Of The Pipe That Fits The Sub Bc Controller Ports66
Outdoor Unit Components68
Outdoor Unit Components And Refrigerant Circuit70
Control Box Of The Outdoor Unit75
Outdoor Unit Circuit Board79
Bc Controller Components89
Control Box Of The Bc Controller92
Bc Controller Circuit Board93
Remote Controller96
Functions And Specifications Of Ma And Me Remote Controllers98
Group Settings And Interlock Settings Via The Me Remote Controller99
Remote Controller Function Selection Via The Me Remote Controller101
Interlock Settings Via The Ma Remote Controller103
Using The Built-In Temperature Sensor On The Remote Controller104
Electrical Wiring Diagram106
Electrical Wiring Diagram Of The Outdoor Unit108
Electrical Wiring Diagram Of The Bc Controller113
Electrical Wiring Diagram Of Transmission Booster123
Refrigerant Circuit124
Refrigerant Circuit Diagram126
Principal Parts And Functions135
Control144
Functions And Factory Settings Of The Dipswitches146
Inv Board148
Function Of The Switch (Indoor Unit)150
Function Of The Switch - Remote Controller151
Switch Functions - Bc Controller152
Controlling The Outdoor Unit153
Startup Sequence Rotation153
Bypass Control154
Defrost Operation Control156
Starting The Defrost Operation156
Stopping The Defrost Operation157
Problems During Defrost Operation157
Change In The Number Of Operating Indoor Units During Defrost157
Refrigerant Recovery Control158
Capacity Control Of Outdoor Fan And Heat Exchanger159
Control At Initial Start-Up160
Emergency Operation Mode162
Problems With The Outdoor Unit162
Ending The Emergency Operation162
Control Method164
Cooling/Heating Circuit Control165
General Function Of System Equipment165
Operation Mode166
Operation Pattern For Automatic Cooling/Heating Mode166
Relationship Between The Operation Mode And The Load Capacity166
Controlling Bc Controller168
Operation Flow Chart169
Test Run Mode176
Items To Be Checked Before A Test Run178
Test Run Method179
Operating Characteristic And Refrigerant Amount180
Adjusting The Refrigerant Amount180
Amount Of Refrigerant To Be Added181
Refrigerant Amount Adjust Mode183
The Following Symptoms Are Normal185
Standard Operation Data (Reference Data)186
Troubleshooting202
Error Code Lists204
Responding To Error Display On The Remote Controller208
Serial Communication Error208
Panel Communication Error208
Discharge Temperature Fault210
Low Pressure Fault211
High Pressure Fault 1 (Outdoor Unit)212
High Pressure Fault 2 (Outdoor Unit)213
Refrigerant Overcharge213
Drain Sensor Submergence (Models With A Drain Sensor)214
Drain Sensor Submergence (Models With A Float Switch)215
Drain Pump Fault (Models With A Drain Sensor)216
Drain Pump Fault (Models With A Float Switch)217
Drain Sensor (Thd) Fault218
Water Leakage219
Out-Of-Range Outside Air Temperature220
Open Phase221
Transmission Power Supply Fault Error Detail Code Ff (Outdoor Unit)223
Indoor Unit Fan Operation Error224
Power Supply Signal Sync Error225
Rpm Error/Motor Error226
Abnormal Bus Voltage Drop227
Abnormal Bus Voltage Rise229
Vdc Error230
Logic Error231
Low Bus Voltage At Startup232
Heatsink Overheat Protection233
Overload Protection235
Ipm Error237
Dcct Overcurrent239
Instantaneous Overcurrent239
Overcurrent (Effective Value)239
Short-Circuited Ipm/Ground Fault240
Overcurrent Error Due To Short-Circuited Motor241
Heatsink Overheat Protection At Startup241
Return Air Temperature Sensor (Th21) Fault (Indoor Unit)242
Return Air Temperature Sensor (Th4) Fault (Oa Processing Unit)242
Heat Exchanger Outlet Temperature Sensor (Th3) Fault (Outdoor Unit)243
Heatsink Temperature Sensor (Thhs) Fault244
Liquid Inlet Temperature Sensor (Th11) Fault (Bc Controller)245
Bypass Outlet Temperature Sensor (Th12) Fault (Bc Controller)245
Lev3 Outlet Temperature Sensor Fault (Bc Controller)245
High-Pressure Sensor Fault246
High-Pressure Sensor Fault (Outdoor Unit Hps/Bc Controller Ps1)247
Intermediate Pressure Sensor Fault (Bc Controller Ps3)247
Acct Sensor Fault248
Dcct Sensor Fault249
Acct Sensor Circuit Fault249
Dcct Sensor Circuit Fault250
Open-Circuited Ipm/Loose Acct Connector250
Faulty Acct Wiring251
Temperature Sensor Fault253
Loose Float Switch Connector254
Remote Controller Board Fault (Nonvolatile Memory Error)254
Remote Controller Board Fault (Clock Ic Error)254
Address Overlaps255
Polarity Setting Error255
Transmission Processor Hardware Error256
Transmission Line Bus Busy Error257
Communication Error Between Device And Transmission Processors257
No Ack Error258
No Response Error267
Ma Controller Signal Reception Error (No Signal Reception)268
Ma Remote Controller Signal Transmission Error (Synchronization Error)269
Ma Remote Controller Signal Transmission Error (Hardware Error)270
Ma Controller Signal Reception Error (Start Bit Detection Error)271
Total Capacity Error272
Capacity Code Setting Error273
Wrong Number Of Connected Units274
Address Setting Error275
Port Setting Error276
Connection Information Signal Transmission/Reception Error277
Remote Controller Sensor Fault277
Function Setting Error (Incorrect Resistor Connection)278
Model Setting Error279
Incompatible Unit Combination280
Troubleshooting According To The Remote Controller Malfunction281
Outdoor Unit Stops At Times During Operation293
Investigation Of Transmission Wave Shape/Noise294
Troubleshooting Principal Parts297
High-Pressure Sensor297
Low-Pressure Sensor298
Solenoid Valve299
Outdoor Unit Fan304
Lev306
Troubleshooting Principal Parts Of Bc Controller308
Pressure Sensor308
Temperature Sensor310
Troubleshooting Flow Chart For Lev Solenoid Valve312
Troubleshooting Flow Chart For Solenoid Valve Body315
Bc Controller Transformer318
Inverter (Tjmu-A)319
Inverter Output Related Troubles321
Trouble Treatment When The Main Power Breaker Is Tripped324
Checking Procedure For Individual Components Of Main Inverter Circuit325
Intelligent Power Module326
Diode Stack327
Troubleshooting For Igbt Module327
Inverter (Yjmu-A) - -Nverter-Related Problems329
Checking For Individual Components Of Main Inverter Circuit334
Control Circuit (Tjmu-A)336
Control Power Source Function Block336
Indoor Unit337
Troubleshooting Transmission Power Circuit Of Outdoor Unit338
Control Circuit (Yjmu-A)340
Refrigerant Leak342
Compressor Replacement Instructions344
Servicing The Bc Controller359
Troubleshooting Using The Outdoor Unit Led Error Display362
Led Monitor Display On The Outdoor Unit Board364
How To Read The Led On The Service Monitor366
Time Data Storage Function367
Led Monitor Display368