Toshiba RAS-3M26S3AV-E Service Manual page 74

Check Outdoor
code LED display
[18]
[19]
[1A]
[1B]
(Item without special mention indicates part of outdoor unit.)
∗ 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.
Heat exchanger temp. sensor (TE) error, Suction temp. sensor (TS) error
[Suction temp. sensor (TS) error]
Is connection of CN603
on P.C.B MCC-5071 correct?
Is resistance value of TS sensor correct?
YES
[Heat exchanger temp. sensor (TE) error]
Is connection of CN601
on P.C.B MCC-5071 correct?
Is resistance value of TE sensor correct?
YES
[Discharge temp. sensor (TD) error]
Is connection of CN600
on P.C.B MCC-5071 correct?
Is resistance value of TD sensor correct?
YES
[Fan system error]
Is AC mains voltage correct?
(198 to 264V)
YES
Rotate shaft of the fan motor by hands
during power-OFF, Can it rotate smoothly?
Is coil resistance of fan motor correct?
Between red and white lead wire :12 to 20Ω.
Between white and black lead wire :12 to 20Ω.
Between black and red lead wire :12 to 20Ω.
NO
Replace fan motor.
[Outside temp. sensor (TO) error]
Is connection of CN602
on P.C.B MCC-5071 correct?
Is resistance value of TO sensor correct?
YES
- 74 -
Check and troubleshooting
NO
NO
NO
NO
NO
NO
FILE NO. SVM-15074
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.
Check wiring construction.
Ask repair of power supply.
Check outdoor P.C.B MCC-1571
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.