Sinclair SCV-EB Series Service Manual page 87

5.29.7 L4 troubleshooting
Situation 1: L4/L0 error appears immediately after the outdoor unit is powered-on
Condition 2: L4 error appears after the compressor has been running for a period of time and the compressor speed is
over 60rps
Compressor is over-current
Replace the inverter PCB
Notes:
1. Re-start the unit, use clip-on ammeter to measure the compressor current, if the current is normal indicates the compressor is failed, if the current is
abnormal indicates the inverter PCB is failed.
5.29.8 L5/L7 troubleshooting
The wire is not connected properly
Inverter module PCB has malfunctioned
Replace the compressor
Replace the inverter PCB
L4
2
No
L5/L7
Yes
No
L4/L0
Yes
Replace the compressor
NO
Ensure wire is connected properly
Yes
Replace inverter module PCB
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