Toshiba RAV-M240A-E Service Manual page 18

Block level
Check Check
Block
code code
Indoor PC
board
Cable
connection/
Thermal fuse
Refrigerant
system
Table 8-5
Diagnosis function
Air conditioner
Symptom
status
Thermo sensor Continued
short/break. operation
Heat exchanger Continued
sensor short/ operation
break.
Indoor fan lock, All off.
abnormality of
indoor fan.
Abnormality of Continued
other indoor unit operation
PC board.
Wrong wiring or All off.
disconnection of
connective cable.
• Thermal fuse All off.
cut off.
• Indoor fan lock,
abnormality of
indoor fan.
• Gas shortage.
All off.
(gas leak)
• Other refriger-
ant cycle
trouble.
• Heat ex-
changer sensor
off/break/short.
• Overload relay
break
Compressor
All off.
break down.
– 18 –
Judgement and action
Condition
Indicated when • Check thermo sensor.
detected abnor-
• If it is OK, check PC
mal.
board. (Around sensor
circuit)
Indicated when • Check heat exchanger
detected abnor- sensor.
mal.
• If it is OK, check PC
board. (Around sensor
circuit)
Indicated when • Check motor.
detected abnor-
• Replace PC board, if
mal.
the same failure
occurs, after the
motor check.
Indicated when Replace PC board.
detected abnor-
mal.
Indicated when • Check flat cable
detected abnor- correct if wiring is
mal. wrong.
• If it is OK, check PC
board.
Indicated when • Check thermal fuse.
detected abnor-
• If it is OK, check
mal.
motor.
• If motor is OK, check
PC board.
• Check gas quantity.
Indicated when
detected abnor- (Check gas leakage)
mal.
• If it is OK, check heat
exchanger sensor.
• If heat exchanger
sensor is OK, check
overload relay.
• If overload relay is
OK, check refrigerant
cycle.
• If refrigerant cycle is
OK, check PC board.
Indicated when • Check compressor.
detected abnor-
• If it is OK, check PC
mal.
board.