Panasonic CS-E18SD3UAW service manual - Page 90

F93 Compressor Rotation Failure

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15.5.19 F93 (Compressor Rotation Failure) 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 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 Caution For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Is the connector connection normal? NO YES Disconnect the harnesses U, V and W from the compressor terminal Connector poor contact Correct the connection From the disconnected harnesses U, V and W, correct 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 NO sequence/condition? YES IPM defective Replace outdoor unit PCB Replace compressor 90

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15.5.19 F93 (Compressor Rotation Failure)
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
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?
Disconnect the harnesses U, V and W from the
compressor terminal
Is the blinking of the 6 LEDs in same
sequence/condition?
From the disconnected harnesses U, V and W,
correct them to the inverter checker. Turn ON the
power and operate the system. Check the inverter
checker 6 LEDs blinking condition.
For safety reason and to prevent component
breakdown, always switch off the power before
remove and connect the component.
YES
YES
NO
NO
Connector poor contact
Correct the connection
IPM defective
Replace outdoor unit PCB
Replace compressor
Caution