Toshiba RAV-SP1104AT8-E Service Manual page 75

Check Outdoor
code LED display
[P03] <Display 1> <Display 2>
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¡
l
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[P04] There is a possibility that it is one of the following errors.
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, (4) case thermo operation.
<Display 1> <Display 2>
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l
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(Item without special mention Indicates part of outdoor unit.)
[Discharge temp. error]
¡
l
Is there no gas leak?
l
Is refrigerant charge amount adequate?
l
¥
¥
Is PMV normal?
Is it not abnormal overload?
Is CN603 connection normal?
Is resistance value of TD sensor normal?
[High pressure SW system error]
¡
Power supply error (Vdc), High pressure protective operation, Case thermostat
operation.
l
l
Doesn't high pressure switch
¥
operate?
l
YES
l
Are parts of
high pressure switch normal?
YES
Is service valve fully opened?
YES
Reset the power supply and
then do a trial 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
Check and troubleshooting
YES
YES
NO
YES
NO
Is circuit wiring normal?
NO
Defective → Replace
NO
Open service valve fully.
B ← Cooling operation
C ← Heating operation
NO
Is there no fan breakage
YES
– 75 –
NO
Repair defective position.
Recharge refrigerant.
NO
Repair defective position.
Replace defective part.
YES
Correct and clear the cause.
NO
Correct connector.
Sensor error → Replace
Check outdoor P.C. board (MCC-1599).
Defect → Replace
NO
Wiring check,
Parts check
Check Comp. IPDU PC board
Defective → Replace
NO
or coming-off?
YES
Repair defective position.
Connection of connectors,
Fan IPDU, Fan motor, Wiring.
Elimination of
blocking element
Overcharge of refrigerant/
Clogging/Pipe breakage/
Abnormal overload
Correct.
YES