Toshiba RAS-3M18S3AV-E Service Manual page 86

Check Outdoor
code LED display
[18]
 ** * 
* ** * 
* * 
[19]
* * 
[1A]
[1B] * **
:ON ( *:3 sec ON / 0.5 sec OFF) :OFF
(Item without special mention indicates part of outdoor unit.)
∗ There is a possibility that it is one of the following errors.
Confirm LED on display P.C. board (MCC-1646)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-1665 correct?
Is resistance value of TS sensor correct?
YES
[Heat exchanger temp. sensor (TE) error]
Is connection of CN601
on P.C.B MCC-1665 correct?
Is resistance value of TE sensor correct?
YES
[Discharge temp. sensor (TD) error]
Is connection of CN600
on P.C.B MCC-1665 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-1665 correct?
Is resistance value of TO sensor correct?
YES
- 86 -
Check and troubleshooting
NO
NO
NO
NO
NO
NO
FILE NO. SVM-15102
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-1665
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-1665
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-1665
Defect → Replace.
Check wiring construction.
Ask repair of power supply.
Check outdoor P.C.B MCC-1645
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-1665
Defect → Replace.