Toshiba RAV-SP1104AT8-E1 Service Manual page 58

Check Outdoor
code LED display
[P03] <Display 1> <Display 2>
[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>
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[Discharge temp. error]
Is there no gas leak?
Is refrigerant charge amount adequate?
YES
Is PMV normal?
YES
Is it not abnormal overload?
NO
Is CN603 connection normal?
Is resistance value of TD sensor normal?
YES
[High pressure SW system error]
Power supply error (Vdc), High pressure protective operation, Case thermostat
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 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
– 58 –
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
Is circuit wiring normal?
NO
Parts check
Defective → Replace
NO
Open service valve fully.
B ← Cooling operation
C ← Heating operation
Check Comp. IPDU PC board
Defective → Replace
NO
Is there no fan breakage
or coming-off?
YES
Repair defective position.
Connection of connectors,
Fan IPDU, Fan motor, Wiring.
YES
Overcharge of refrigerant/
Clogging/Pipe breakage/
Abnormal overload
NO
Wiring check,
Correct.
YES
NO
Elimination of
blocking element