Toshiba RAV-GM1601AT8P-E Service Manual page 69

Check Outdoor
code LED display
[P04]
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[High pressure SW system error]
Does high pressure switch operate?
YES
Are parts of
high pressure switch correct?
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
correctly operate?
YES
Is there any element
which blocks heat exchanger
of the outdoor unit?
Clogging of heat exchanger
Short circuit
NO
C Heating operation
Does the heating indoor fan
correctly 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
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NO
Is circuit wiring correct?
YES
NO
Parts check
Defective → Replace
NO
Open service valve fully.
B ← Cooling operation
C ← Heating operation
Check outdoor PC board
Defective → Replace
NO
Is there fan breakage
or coming-off?
NO
Repair defective position.
Connection of connectors,
outdoor P.C. board,
YES
Overcharge of refrigerant/
Clogging/Pipe breakage/
Abnormal overload
NO
Are connections of
connectors,capacitors
and fan motor correct?
YES
YES
Elimination of
blocking element
Are resistance value
of TC and TCJ sensor
correct?
YES
NO
Wiring check,
Correct.
YES
Fan motor, Wiring.
Elimination of
blocking element
NO
Repair
defective position.
NO
Replace
TC or TCJ sensor.