Toshiba RAV-SM1103AT-E1 Service Manual page 55

Check Outdoor
code LED display
∗ There is a possibility that it is one of the following errors.
[P04]
Confirm LED on outdoor P.C. board to judge which error it is. (1) high-pressure SW system error,
(2) power supply error (Vdc), (3) high-pressure protective operation.
(Item without special mention Indicates part of outdoor unit.)
[High pressure SW system error]
Power supply error (Vdc), High pressure protective operation.
Doesn't high pressure switch
operate?
YES
Are parts of
high pressure switch normal?
YES
Is service valve fully opened?
YES
Reset the power supply and
then do a test operation according
to the season.
B Cooling operation.
Does cooling outdoor fan
normally operate?
YES
Is there any element
which blocks heat exchanger
of the outdoor unit?
Clogging of heat exchanger
Short circuit
NO
Heating operation
C
Does the heating indoor fan
normally operate?
YES
Is there any element which
blocks indoor heat exchanger?
Filter clogging
Clogging of heat exchanger
Short circuit
NO
Clogging by refrigerant
overcharge/Pipe breakage/
Abnormal overload
Check indoor P.C. board
Defective → Replace
– 55 –
<DCheck and troubleshooting
NO
Is circuit wiring normal?
NO
Parts check
Defective → Replace
NO
Open service valve fully.
B ← Cooling operation
C ← Heating operation
Check outdoor PC board
NO
Is there no fan breakage
or coming-off?
YES
YES
Overcharge of refrigerant/
Clogging/Pipe breakage/
NO
Are connections of
connectors,capacitors
and fan motor normal?
YES
YES
Elimination of
blocking element
Are characteristics
of TC and TCJ sensor
resistance value normal?
YES
NO
Wiring check,
Correct.
YES
Defective → Replace
NO
Repair defective position.
Connection of connectors,
outdoor P.C. board,
Fan motor, Wiring.
Elimination of
blocking element
Abnormal overload
NO
Repair
defective position.
NO
Replace
TC or TCJ sensor.