Toshiba MM-A0160HX, Service Manual

Page: 58 / 135

59
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code Operation cause
1. Float switch disconnection
[0b]
2. Drain pump operation error
Indoor water overflow alarm
3. Drain hose blockage
Check code Operation cause
[0C] Indoor TA sensor alarm TA sensor open/short
Is drain pump connected ?
Is circuit wiring normal ? (*1)
Is power to drain pump
turned on ? (*2)
Does float switch operate ?
Does drainage water collect ?
Does drain pump operate ?
Check for blockage of
drainage hose.
Check connection of connector CN11
(Drain pump: Indoor main,
P.C. board (MCC-1361-01))
Check and modify wiring circuit.
(MCC-1361-01)
Indoor P.C. board error
(MCC-1361-01)
Float switch error
Check and modify wiring circuit.
Drain pump error.
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
(*1) For confirmation, check voltage under
condition that connector is connected to CN11.
(*2) Check whether voltage of
CN08, pins 1 to 3 of the
indoor main P.C. board, is
230V or not (MCC1361-01).
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 P.C. board (MCC-1361-01).