Toshiba RAS-10SA-E Service Manual page 37

Block level
Check Check
Block
code
Indoor PC
board
Refrigerant
system
Contents detected by the check codes "
supply is turned off. Therefore, contents of operations in the past are all displayed.
Diagnosis function
Symptom
code
Thermo sensor
short/break.
Heat exchanger
sensor short/break.
Indoor fan lock,
abnormality of
indoor fan.
Abnormality of
other indoor unit PC
board.
1) Gas shortage.
(gas leak)
2) Other refrigerant
cycle trouble.
3) Heat exchanger
sensor off/break/
short.
4) Overload relay
" to "
Table 9-2-4
Air
Conditioner
Condition
status
Continued Indicated when
operation detected abnormal
Continued Indicated when
operation detected abnormal
All off Indicated when
detected abnormal
All off Indicated when
detected abnormal
All off Indicated when
detected abnormal
" are stored in memory of the microcomputer even if the power
– 37 –
Judgment and action
1. Check thermo sensor.
2. If it is OK, check PC board.
1. Check heat exchanger
sensor.
2. If it is OK, check PC board.
1. Disconnect the power plug
from AC outlet, and pull out
the connector (CN10) for the
motor, then connect the plug
of AC power cord again and
turn the power on.
2. Check the voltage between
pin 1 and 2 of the connector
(CN10).
3. If the output voltage is 35V,
PC board is OK, check
motor.
Replace PC board.
1. Check gas quantity.
(check gas leakage)
2. If it is OK, check heat
exchanger sensor.
3. If heat exchenger sensor is
OK. check overload relay and
thermostat for compressor.
4. If overload relay is OK, check
refrigerant cycle.
5. If refrigerant cycle is OK,
check PC board.