F93

Malfunction Decision Conditions

  • A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit.

Malfunction Caused

  • Compressor terminal disconnect
  • Faulty Outdoor PCB
  • Faulty compressor

Troubleshooting

When F93 indication happens
⚠
Caution For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.
↓
Check the U, V and W connector connection:
- Turn OFF the power
- Check the U, V and W connector connection at outdoor PCB and compressor terminal
↓
Is the connector connection normal?
NO
→
  • Connector poor contact
  • Correct the connection
YES
↓
Disconnect the harnesses U, V and W from the compressor terminal
↓
From the disconnected harnesses U, V and W, connect them to the inverter checker. Turn ON the power and operate the system. Check the inverter checker 6 LEDs blinking condition.
↓
Is the blinking of the 6 LEDs in same sequence/condition?
NO
→
  • IPM defective
  • Replace outdoor unit PCB
YES
↓
YES
►
  • Replace compressor
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