Service Manual

SiUS091133 Troubleshooting
Service Diagnosis 96
Troubleshooting
Note: Check the following connector.
Check the combination of the
indoor and outdoor unit.
OK?
Check the connection of
connectors (See Note.).
Correct the connection.
OK?
Check the power supply
voltage.
Start operation.
Voltage as rated?
Error repeats?
Check the power supply
voltage.
Start operation.
Voltage as rated?
Error repeats?
Error repeats?
YES
NO
NO
YES
NO
NO
YES
(R15270)
Caution
∗ To secure the connection,
once disconnect the connector
and then reconnect it.
YES
NO
YES
NO
YES
NO
YES
Match the compatible
models.
Correct the power
supply.
Replace the indoor unit
PCB (1).
Completed.
Completed.
Correct the power
supply.
Replace the indoor unit
PCB (1).
Completed.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Model Type Connector
FTXS series Terminal board ~ Control PCB
FDXS series Terminal board ~ Control PCB