Toshiba RAV-SM304SDT-TR Service Manual page 110

Check Outdoor
code LED display
[P20] <Display 1> <Display 2>
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[High pressure protective operation]
Is service valve
fully opened?
YES
Reset the power supply
and then perform test run
matching to the season.
Heating season
Heating operation
Check overcharge of refrigerant, clogging of cycle,
broken pipe, abnormal overload, etc.
Defect → Correct defect.
Does indoor fan
operate correctly?
YES
Is there anything which interfere
heat exchange of indoor unit?
• Choking up the filter
• Clogging of heat exchanger
• Short-circuit
NO
Check overcharge of refrigerant, clogging of cycle,
broken pipe, abnormal overload, etc.
Defect → Correct defect.
– 110 –
NO
Cooling season
Cooling operation
Is resistance value
of TL sensor correct?
YES
Is there any defect such as
loosening of nut in the outdoor fan?
NO
Defect → Replace, retightening
Does the outdoor fan perform
abnormal operation?
NO
Is there anything
which interfere heat exchange
of outdoor unit?
• Clogging of heat exchanger
• Short-circuit
NO
Eliminate interfering element.
NO
Are indoor fan motor
an connector correct?
YES
Are resistance values
of indoor TC and TCJ
sensors normal?
YES
YES
Eliminate interfering element.
<In case of SP80>
Open service valve fully.
NO
Replace TL sensor.
YES
Check outdoor fan.
YES
Check the same items as
[P22] error.
YES
NO
Repair defect.
NO
Replace
sensor.
Check indoor P.C. board.
Defect → Replace