Toshiba A90-0132, Service Manual

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Check code Operation cause
[0b]
1. Float switch disconnection
Drain pump fault
2. Drain pump operation error
3. Drain hose blockage
Troubleshooting
Diagnostic procedure for check code
Is drain pump connected?
Does float switch operate?
Does drainage water collect?
Does drain pump operate?
Check for blockage of
drainage hose.
Is circuit wiring
normal?(*1)
(*1) For confirmation, check voltage under condition
that connector is connected to CN11.
Is power to drain
pump turned on?(*2)
Drain pump error
Check connection of connector CN11
(Drain pump: Indoor main, PC board
(MCC-1361-01))
Check and modify wiring circuit.
(MCC-1361-01)
Indoor PC board error
(MCC-1361-01)
Float switch error
Check and modify wiring
circuit.
(*2) Check whether voltage of CN08, pins
1 to 3 of the indoor main PC board, is
230V or not (MCC1361-01).
Yes
Yes
Yes
Yes
Yes
No
No No
No
Check code Operation cause
[0C]
Indoor sensor (TA) short or open circuit alarm
TA sensor open/short
TA sensor open/short has been detected. Check disconnection of connector connection (TA sensor: CN04)
circuit and resistance value characteristics of sensor.
When the sensors are normal, replace indoor PC board (MCC-1361-01).
No
No