M thermal Split
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202004
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Situation 3: L0 error appears within 2 seconds of compressor start-up
L0
U V W wire between inverter module and
compressor is not connected properly
1
Yes
Ensure U V W wire is connected properly
No
Communication port for connection to
inverter module on refrigerant system
main PCB is damaged
2
Yes
Replace the main PCB
No
Replace the inverter module
3
Notes:
1.
Connect the U V W wire from the inverter module to the correct compressor terminals, as indicated by the labels on the compressor.
2.
Measure the voltage between each of W-, W+, V-, V+, U-, U+ and GND when the unit is in standby. The normal voltage should be 2.5V-4V and the six
voltages should be same, otherwise the communication terminal has failed. Refer to Figure4-4.8.
Figure 4-4.8: Connection port for inverter module
3.
When replacing an inverter module, a layer of thermally conductive silica gel should be painted on the IPM module (on the reverse side of the inverter
module PCB). Refer to Figure 4-4.2.
Midea CAC Confidential
Summary of Contents for HB-A100/CGN8-B
Page 1: ...M Thermal A Series Split Commercial Air Conditioners R32 Service Manual Midea CAC Confidential...
Page 3: ...M thermal Split 2 202004 Midea M thermal Split Service Manual Midea CAC Confidential...
Page 7: ...M thermal Split 6 202004 Midea M thermal Split Service Manual Midea CAC Confidential...
Page 17: ...M thermal Split Midea M thermal Split Service Manual 16 202004 Midea CAC Confidential...
