Chapter 8 Troubleshooting Based On Observed Symptoms - Mitsubishi Electric PUHY-P200 Service Handbook
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Also See for PUHY-P200:
- Service handbook (355 pages) ,
- Service handbook (182 pages) ,
- Service handbook (40 pages)
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Chapter 8
Troubleshooting Based on Observed Symptoms
8-1
MA Remote Controller Problems..................................................................................................... 237
8-1-1
The LCD Does Not Light Up. .............................................................................................................. 237
8-1-2
The LCD Momentarily Lights Up and Then Goes Off. ........................................................................ 238
8-1-3
"HO" and "PLEASE WAIT" Do Not Go Off the Screen. ...................................................................... 239
8-1-4
Air Conditioning Units Do Not Operate When the ON Button Is Pressed. .......................................... 240
8-2
ME remote Controller Problems ...................................................................................................... 241
8-2-1
The LCD Does Not Light Up. .............................................................................................................. 241
8-2-2
The LCD Momentarily Lights Up and Then Goes Off. ........................................................................ 242
8-2-3
"HO" Does Not Go Off the Screen. ..................................................................................................... 243
8-2-4
"88" Appears on the LCD.................................................................................................................... 244
8-3
Refrigerant Control Problems.......................................................................................................... 245
8-3-1
Units in the Cooling Mode Do Not Operate at Expected Capacity...................................................... 245
8-3-2
Units in the Heating Mode Do Not Operate at Expected Capacity. .................................................... 247
8-3-3
Outdoor Units Stop at Irregular Times. ............................................................................................... 249
8-4
Checking Transmission Waveform and for Electrical Noise Interference .................................. 250
8-4-1
M-NET................................................................................................................................................. 250
8-4-2
MA Remote Controller ........................................................................................................................ 252
8-5
8-5-1
Comparing the High-Pressure Sensor Measurement and Gauge Pressure....................................... 253
8-5-2
High-Pressure Sensor Configuration (63HS1).................................................................................... 253
8-5-3
Comparing the Low-Pressure Sensor Measurement and Gauge Pressure........................................ 254
8-5-4
Low-Pressure Sensor Configuration (63LS) ....................................................................................... 254
8-6
Troubleshooting Solenoid Valve Problems.................................................................................... 255
8-7
Troubleshooting Outdoor Unit Fan Problems................................................................................ 257
8-8
Troubleshooting LEV Problems ...................................................................................................... 258
8-8-1
General Overview on LEV Operation.................................................................................................. 258
8-8-2
Possible Problems and Solutions ....................................................................................................... 261
8-8-3
Coil Removal Instructions ................................................................................................................... 262
8-9
Troubleshooting Inverter Problems ................................................................................................ 264
8-9-1
Inverter-Related Problems and Solutions ........................................................................................... 264
8-9-2
Checking the Inverter Board Error Detection Circuit........................................................................... 266
8-9-3
Checking the Compressor for Ground Fault and Coil Resistance Problems ...................................... 266
8-9-4
Checking the Inverter for Damage at No-Load ................................................................................... 266
8-9-5
Checking the Inverter for Damage during Compressor Operation...................................................... 267
8-9-6
Checking the Converter for Damage during Compressor Operation .................................................. 269
8-9-7
Checking the Fan Motor for Ground Fault and Coil Resistance Problems ......................................... 269
8-9-8
Checking the Fan Board Error Detection Circuit at No Load .............................................................. 269
8-9-9
Checking the Fan Inverter for Damage at No Load ............................................................................ 270
8-9-10 Checking the Fan Inverter for Damage with Load .............................................................................. 271
8-9-11 Checking the Installation Conditions................................................................................................... 271
8-9-12 Solutions for the Main No-Fuse Breaker Trip...................................................................................... 272
8-9-13 Solutions for the Main Earth Leakage Breaker Trip ............................................................................ 272
8-9-14 Simple Check on Inverter Circuit Components ................................................................................... 273
8-9-15 Troubleshooting Problems with IGBT Module .................................................................................... 273
8-10
Control Circuit................................................................................................................................... 276
8-10-1 Control Power Supply Function Block................................................................................................. 276
8-10-2 Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit ............................ 278
HWE14040
- 235 -
GB
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