Toshiba RAS-10SKH-ES Service Manual page 43

Block level
Check Check
Block
code code
Indoor
P.C. board
Cable
connection/
Thermal
fuse
Refrigerant
system
Contents detected by the check codes
supply is turned off. Therefore, contents of operations in the past are all displayed.
Table 9-2-4
Diagnosis function
Symptom conditioner
Thermo. sensor Continued Indicated when
short/break. operation
Heat exchanger Continued Indicated when
sensor short/break. operation
Indoor fan lock, All off
abnormality of
indoor fan.
Abnormality of other All off
indoor unit P .C.
board.
1) Wrong wiring or All off
disconnection of
connective cable.
2) Thermal fuse cut
off.
1) Gas shortage. All off
(gas leak)
2) Other refrigerant
cycle trouble.
3) Heat exchanger
sensor off/break/
short.
4) Overload relay or
thermostat for
compressor
break.
Compressor break All off
down.
" " " "
to are stored in memory of the microcomputer even if the power
– 43 –
Air
Condition
status
detected abnormal
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Judgment and action
1. Check thermo. sensor.
2. If it is OK, check P.C. board.
1. Check heat exchanger
sensor.
2. If it is OK, check P.C. 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,
P.C. board is OK, check
motor.
Replace P.C. board.
1. Check connective cable
correct if wiring is wrong.
2. Check thermal fuse and
Terminal blocks.
3. If it is OK, check P.C. board.
1. Check gas quantity.
(check gas leakage)
2. If it is OK, check heat ex-
changer sensor.
3. If heat exchenger sensor is
OK, check overload relay and
thermostat for compressor.
4. If overload relay and
themostat for compressor
are OK, check refrigerant
cycle.
5. If refrigerant cycle is OK,
check P.C. board.
1. Check compressor.
2. If it is OK, check P .C. board.