Troubleshooting
Samsung Electronics 4-25
IPM (Over Current) error - (E464) (cont.)
Yes
1. Replace the compressor wire. → Power ON. → Check
normal startup. → End the service.
2. Replace the compressor wire. → Power ON. → Check
normal startup. → End the service.
3. Replace the compressor wire. → Power ON. → Check
normal startup. → End the service.
No
1. Did compressor
wires assembled in the appropriate color?
(U:Red, V:Blue, W:Yellow) → Check for disconnections
of PCB and COMP.
2. Is the terminal in the compressor wire housing firmly assembled?
3. Is there any fault of compressor
wires in disconnection
or cutting?
Replace the PCB.
Continue
Yes
※ Do not replace EMI and Main PCB of outdoor unit.
→ E464 is related to Inverter PCB.
※ Ensure that the service valve is open!
→ When the service valve is closed, the defects may be caused by differential
pressure when starting the compressor.
W
V
U
W
V
U
W
V
U
W
V
U
PCB connecting connector PCB connecting connector
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