GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
165
Attachment: How to check whether the IPM module is damaged
1. Preparation: Find a digital multi-meter and switch it to the diode. Remove U, V and W cables of the
compressor from the drive board two minutes after the system is powered off. Make sure that it is tested
at least two minutes after the system is powered off.
2. Method: Use the black probe of the multi-meter to touch the place marked by P in the follow picture
and the red probe to touch places marked by U, V and W respectively and record readings of the
multi-meter. Use the red probe to touch the place marked by N and black probe to touch places marked
by U, V and W respectively and record readings of the multi-meter.
3. Analyzing: If the reading ranges between 0.3 V and 0.7 V in the above-mentioned six scenarios, the
IPM module is normal. If the reading is 0 in one or multiple scenarios, the IPM module is damaged.
(4) Variable-frequency compressor drive board IPM over-temperature fault (ODU fault P8)
No
Yes
No
P8
Check if the fault
occurs when the
system is powered on.
Check if the IPM module is
screwed well and thermal gel
is applied on the surface.
Complete
Replace the
compressor's drive
board.
Screw the IPM module
properly and apply
thermal gel on the
surface.
Summary of Contents for GMV-224WM/B-X
Page 1: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL T1 R410A 50 60Hz GC201508...
Page 27: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 24...
Page 29: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 26 V Construction Organization Process...
Page 38: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 35...
Page 47: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 44 GMV 504WM B X GMV 560WM B X and GMV 615WM B X...
Page 156: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 153 low press ure air pipe...
Page 158: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 155 2 Low exhaust temperature protection E2...
Page 160: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 157...
Page 161: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 158 5 System refrigerant lacking protection U4...
Page 162: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 159 6 System high pressure ratio protection J8...
Page 163: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 160 7 System low pressure ratio protection J9...
Page 165: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 162 11 Pressure sensor fault...
Page 224: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 221 2 Model GMV 335WM B X Exploded View...
Page 242: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 239...
Page 248: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 245 Click Finish...
Page 254: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 251 Click Next Installing...
Page 255: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 252 Click Close...
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Page 287: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 284 1 4 2 5 Communication Debug...
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