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Additional Information for “CHECK LIST ON COMPRESSOR"
Check item
Additional information (mechanism of the compressor failure)
1 & 2
The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td
when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will
become small by detecting the temperature even if the actual discharge gas temperature is high. Therefore,
this abnormal overheating by detecting the temperature operation will result in insulation failure of the
motor winding.
3 & 4
Overcurrent control (operating frequency control) is performed by detecting current by the PCB2.
In this case, winding insulation failure will occur, since control is not available in spite of actually high
current.
5 & 6
The current sensor checks phase and adjusts output electrical wave in addition to the above mentioned
items. If fault occurs, the output electrical wave becomes unstable giving stress to the motor winding,
resulting in winding insulation failure.
7 &8
During a cooling operation, SH is controlled by MV of each indoor units.
During a heating operation, Td is controlled by MV1.
If expansion valves are incorrectly connected, correct control is not available, resulting in compressor
seizure depending on liquid refrigerant returning conditions or motor winding insulation failure depending
on overheating conditions.
9
If the refrigeration cycle and electrical system are incorrectly connected, abnormally low suction pressure
operation is maintained or abnormally high discharge pressure operation is maintained, resulting in giving
stress to the compressor, since their correct control is not available.
10
ditto
11
The compressor may be locked due to the liquid return operation during the cooling operation.
12
In the case that the contacting resistance becomes big, voltage imbalance among each phase will cause
abnormal overcurrent.
13
In this case, overcurrent will occur, efficiency will decrease or the motor winding will be excessively heated.
14
In the case, it will result in motor burning or compressor seizure.
Procedure of checking other main parts for ES Series
1. High voltage discharge work for replacing parts
D A N G E R
•
Perform this high voltage discharge work to avoid an electric shock
•
DIP-IPM
Procedure:
8 Troubleshooting
312
SMGB0060 rev. 1- 12/2010
Summary of Contents for RAS-10HRNM
Page 2: ......
Page 4: ...Index ii SMGB0060 rev 1 12 2010 ...
Page 56: ...2 Unit Installation 48 SMGB0060 rev 1 12 2010 ...
Page 117: ...RAS 4 6 HVRNM1E 4 Electrical Wiring 109 SMGB0060 rev 1 12 2010 4 ...
Page 118: ...RAS 4 6 HRNM1E 4 Electrical Wiring 110 SMGB0060 rev 1 12 2010 ...
Page 121: ...RAS 3HVRNS 4 Electrical Wiring 113 SMGB0060 rev 1 12 2010 4 ...
Page 122: ...RAS 4 6 HVRNS1E 4 Electrical Wiring 114 SMGB0060 rev 1 12 2010 ...
Page 123: ...RAS 8 10 HRNSE 4 Electrical Wiring 115 SMGB0060 rev 1 12 2010 4 ...
Page 124: ...4 Electrical Wiring 116 SMGB0060 rev 1 12 2010 ...
Page 145: ...Dry operation Continues in the next page 5 Control System 137 SMGB0060 rev 1 12 2010 5 ...
Page 147: ...Heating operation Continues in the next page 5 Control System 139 SMGB0060 rev 1 12 2010 5 ...
Page 148: ...5 Control System 140 SMGB0060 rev 1 12 2010 ...
Page 153: ...Activation for protection device control 5 Control System 145 SMGB0060 rev 1 12 2010 5 ...
Page 162: ...Activation for protection device control 5 Control System 154 SMGB0060 rev 1 12 2010 ...
Page 166: ...Preheating control of compressor 5 Control System 158 SMGB0060 rev 1 12 2010 ...
Page 168: ...5 Control System 160 SMGB0060 rev 1 12 2010 ...
Page 180: ...6 Optional functions 172 SMGB0060 rev 1 12 2010 ...
Page 224: ...8 Troubleshooting 216 SMGB0060 rev 1 12 2010 ...
Page 263: ...RAS 4 6 HVRNS1E 8 Troubleshooting 255 SMGB0060 rev 1 12 2010 8 ...
Page 264: ...RAS 8 10 HRNSE 8 Troubleshooting 256 SMGB0060 rev 1 12 2010 ...
Page 269: ...RAS 8 10 HRNSE 8 Troubleshooting 261 SMGB0060 rev 1 12 2010 8 ...
Page 337: ...RAS 4 6 HVRNM1E Cycle and structural parts 9 Spare Parts 329 SMGB0060 rev 1 12 2010 9 ...
Page 340: ...RAS 4 6 HRNM1E Cycle and structural parts 9 Spare Parts 332 SMGB0060 rev 1 12 2010 ...
Page 342: ... Electrical parts 9 Spare Parts 334 SMGB0060 rev 1 12 2010 ...
Page 354: ... Electrical parts 9 Spare Parts 346 SMGB0060 rev 1 12 2010 ...
Page 356: ...RAS 8 10 HRNSE Cycle and structural 9 Spare Parts 348 SMGB0060 rev 1 12 2010 ...
Page 359: ... Electrical parts 9 Spare Parts 351 SMGB0060 rev 1 12 2010 9 ...
Page 440: ...10 Servicing 432 SMGB0060 rev 1 12 2010 ...
Page 464: ...11 Electrical checks of main parts 456 SMGB0060 rev 1 12 2010 ...
Page 481: ......