Sinclair SCV-EB Series Service Manual page 83

Situation 2: L0 error appears within 2 seconds of compressor start-up
DIP Switch S1 setting is wrong
U V W wire between inverter module and
compressor is not connected properly
Communication port for connection to
inverter module on refrigerant system
Replace the inverter module
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.
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).
Fan IPM module
L0
No
No
2
PCB is damaged
No
3
Refer to the wiring diagram to reset the
Yes
Yes
Ensure U V W wire is connected properly
1
Yes
S1 setting
Replace the main PCB
Compressor IPM mdule
81