Table Of Contents - Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook

Table of Contents

Safety Precautions2
Precautions For Handling Units For Use With R410A4
Before Installing The Unit5
Before Installing The Unit And Performing Electrical Work6
Before The Test Run7
Table Of Contents8
I Read Before Servicing12
Necessary Tools And Materials13
Piping Materials14
Storage Of Piping16
Pipe Processing16
Brazing17
Use Of Oxidized Solder For Brazing17
Use Of Non-Oxidized Solder For Brazing17
Air Tightness Test18
Halide Torch18
R22 Leakage Detector18
Recommended Vacuum Gauge19
Vacuum Drying (Evacuation)19
Refrigerant Charging21
Remedies To Be Taken In Case Of A Refrigerant Leak21
Cylinder Color R410A Is Pink.21
Refrigerant Charging In The Liquid State21
Characteristics Of The Conventional And The New Refrigerants22
Notes On Refrigerating Machine Oil23
Restrictions24
System Configuration26
Types And Maximum Allowable Length Of Cables27
Terminal Block For Indoor-Heat Source Transmission Line27
Terminal Block For Centralized Control27
Switch Settings And Address Settings28
Example Of Wiring Connection32
Sample System Connection35
An Example Of A System To Which An Ma Remote Controller Is Connected36
System With One Heat Source Unit36
System With One Heat Source Unit To Which 2 Or More Lossnay Connected38
Group Operation Of Units In A System With Multiple Heat Source Units40
System Controller Connected To Transmission Line42
System Controller Is Connected To Indoor-Heat Source Transmission Line44
A System With Multiple Bc Controller Connections56
An Example Of A System To Which An Me Remote Controller Is Connected58
System Controller Connected To Centralized Control Transmission Line60
An Example Of A System To Which Both Ma Remote Controller And Me Remote Controller Are Connected62
Restrictions On Pipe Length67
System That Requires 16 Bc Controller Ports Or Fewer71
System That Requires More Than 16 Bc Controller Ports73
Difference Between Bc Controller And Indoor Units74
Connecting The Bc Controller78
Heat Source Unit Components82
Heat Source Unit Components And Refrigerant Circuit84
Front View Of A Heat Source Unit84
Refrigerant Circuit85
Control Box Of The Heat Source Unit87
Transformer Box89
Heat Source Unit Circuit Board90
M-Net Board91
Inv Board92
Relay Board94
Noise Filter95
Bc Controller Components97
Control Box Of The Bc Controller100
Bc Controller Circuit Board101
Remote Controller104
Functions And Specifications Of Ma And Me Remote Controllers106
Group Settings And Interlock Settings Via The Me Remote Controller107
Remote Controller Function Selection Via The Me Remote Controller109
Interlock Settings Via The Ma Remote Controller111
Using The Built-In Temperature Sensor On The Remote Controller112
Electrical Wiring Diagram114
Electrical Wiring Diagram Of The Heat Source Unit116
Electrical Wiring Diagram Of The Bc Controller120
Electrical Wiring Diagram Of Transmission Booster129
Refrigerant Circuit Diagram132
Heat Source Unit132
Bc Controller133
Principal Parts And Functions135
Indoor Unit138
Control144
Functions And Factory Settings Of The Dipswitches146
Function Of The Switch Indoor Unit149
Function Of The Switch Remote Controller150
Switch Functions Bc Controller151
Controlling The Heat Source Unit152
Bypass Control153
Compressor Frequency Control154
Refrigerant Recovery Controls155
Capacity Control Of Heat Exchanger155
Heat Source Unit Heat Exchanger Capacity Control Patterns156
Subcool Coil Control158
Refrigerant Flow Control158
Control At Initial Start-Up158
Flowchart Of Initial Operation158
Emergency Operation Mode161
Control Method164
Cooling/Heating Circuit Control165
General Function Of System Equipment165
Operation Mode166
Demand Control168
Controlling Bc Controller169
Operation Flow Chart170
Mode Determination Flowchart170
Operations In Each Mode172
Cooling Operation172
Heating Operation173
Dry Operation174
Test Run Mode182
Items To Be Checked Before A Test Run184
Test Run Method185
Operation Procedures185
Operating Characteristic And Refrigerant Amount186
Adjusting The Refrigerant Amount186
Refrigerant Amount Adjust Mode191
The Following Symptoms Are Normal195
Standard Operation Data (Reference Data)196
Troubleshooting234
Error Code Lists236
Responding To Error Display On The Remote Controller239
Error Code 0403239
Error Code 1102240
Error Code 1301241
Error Code 1302242
Error Code 1500243
Error Code 2000244
Error Code 2134245
Error Code 2135246
Error Code 2500247
Error Code 2502249
Error Code 2503251
Error Code 2600252
Error Code 2601252
Error Code 4102253
Error Code 4106255
Error Code 4115256
Error Code 4116257
Error Code 4220258
Error Code 4230262
Error Code 4240263
Error Code 4250264
Error Code 4260267
Error Codes 5101, 5102, 5103, 5104268
Error Codes 5102, 5103, 5104, 5105, 5106, 5107269
Error Code 5110270
Error Code 5201271
Error Code 5301272
Error Code 5701274
Error Code 6201274
Error Code 6202274
Error Code 6600275
Error Code 6601275
Error Code 6602276
Error Code 6603277
Error Code 6606277
Error Code 6607278
Error Code 6608287
Error Code 6831288
Error Code 6832289
Error Code 6833290
Error Code 6834291
Error Code 7100292
Error Code 7101293
Error Code 7102294
Error Code 7105295
Error Code 7107296
Error Code 7110297
Error Code 7113298
Troubleshooting According To Remote Controller Malfunction299
Flow Chart302
Investigation Of Transmission Wave Shape/Noise312
Troubleshooting Principal Parts315
High-Pressure Sensor315
Low-Pressure Sensor316
Solenoid Valve317
Solenoid Valve Block318
Judgment Methods And Possible Failure Mode322
Heat Source Unit Lev Coil Removal Procedure323
Replacement Procedure325
Troubleshooting Principal Parts Of Bc Controller326
Pressure Sensor326
Temperature Sensor328
Troubleshooting Flow Chart For Lev Solenoid Valve330
Self-Diagnosis Led332
Troubleshooting Flow Chart For Solenoid Valve Body333
Bc Controller Transformer336
Inverter337
Inverter Output Related Troubles339
Trouble Treatment When The Main Power Breaker Is Tripped340
Checking Procedure For Individual Components Of Main Inverter Circuit341
Inv Board External Diagram347
Control Circuit348
Control Power Source Function Block348
Troubleshooting Transmission Power Circuit Of Heat Source Unit349
Refrigerant Leak352
Compressor Replacement Instructions356
Water Heat Exchanger Assembly And Check Valve Replacement Instructions358
Servicing The Bc Controller362
Service Panel362
Control Box362
Thermistor363
Lev364
Troubleshooting Using The Heat Source Unit Led Error Display365
Led Monitor Display On The Heat Source Unit Board366
How To Read The Led On The Service Monitor368
Led Monitor Display370
Current Data370
Error History381
Data On Indoor Unit System388
Setting Data395
Other Types Of Data412