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Block level
Check
Block
code
Indoor
P .C. board
Cable
connection/
Thermal
fuse
Refrigerant
system
Other parts
(including
compressor)
Content detected by the check codes "
power supply is turned off. Therefore, contents of operations in the past are all displayed.
Table 8-4-1
Diagnosis function
Check
Symptom
code
Thermo. sensor short/
break.
Heat exchanger
sensor
short/break.
Indoor fan lock,
abnormality of indoor
fan or thermal fuse
break.
Abnormality of other
indoor unit P.C. board.
1) Wrong wiring or
disconnection of
connective cable.
2) Terminal fuse cut
off.
1) Overload relay or
thermostat for
compressor break.
" to "
Air
Conditioner
Condition
status
Continued
Indicated
operation.
when detected
abnormal
Continued
Indicated
operation.
when detected
abnormal
All off
Indicated
when detected
abnormal
Indicated
All off
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
– 30 –
FILE NO. SVM-0 5039
Judgement 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.Check heat thermal
fuse is blow or not?
(Terminal block part.)
2.If the thermal fuse is
not blow, check indoor
fan motor.
(Refer to trouble
shooting flow charts.)
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.If overload relay and
thermostat for
compressor are OK,
check refrigerant cycle.
2.If refrigerant cycle is
OK, check P.C. board.
3. If heat exchanger
sensor is OK, check
overload relay and
thermostat for
compressor.
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