Toshiba RAS-4M27S3AV-E Service Manual page 86

Check Outdoor
code LED display
[1F]
[20]
(Item without special mention indicates part of outdoor unit.)
[Compressor break down]
Is AC mains voltage correct?
(198 to 264V)
YES
Is wire connection correct?
Compressor lead
(Board side, Compressor Side),
Reactor lead, Power supply lead.
YES
Does an abnormal overload happen?
NO
∗ There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is.
PMV error for A room, B room, C room, D room.
[PMV error for A room]
Is PMV under correct conditions?
YES
Check temp. sensor of A room indoor unit?
TA sensor, TC sensor
OK
[PMV error for B room]
Is PMV under correct conditions?
YES
Check temp. sensor of B room indoor unit?
TA sensor, TC sensor
OK
[PMV error for C room]
Is PMV under correct conditions?
YES
Check temp. sensor of C room indoor unit?
TA sensor, TC sensor
OK
- 86 -
Check and troubleshooting
NO
NO
YES
NO
Error
NO
Error
NO
Error
FILE NO. SVM-15073
Check wiring construction.
Ask repair of power supply.
Check wire connection
and correct it.
Remove and improve
the cause of overload.
Check outdoor P.C.B MCC-1571.
Defect → Replace.
Repair defective position.
Replace defective part.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor A room P.C. board.
Defect → Replace.
Repair defective position.
Replace defective part.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor B room P.C. board.
Defect → Replace.
Repair defective position.
Replace defective part.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor C room P.C. board.
Defect → Replace.