– 76 –
Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[P20]
[High pressure protective operation]
[P04]
Reset the power supply
and then perform test run
matching to the season.
Open service valve fully.
Check outdoor fan.
Failure → Replace, retightening
Replace
TC, TCJ sensor.
Check indoor P.C. board.
Failure → Replace
Fault part repair
Is service valve
fully opened?
Aren't there an outdoor fan's
crack and looseness?
Does the outdoor fan perform
abnormal operation?
Does indoor fan
operate correctly?
Are indoor fan motor
an connector correct?
Is resistance value
of TE sensor correct?
(Resistance value measurement)
Are resistance values
of indoor TC and TCJ
sensors normal?
Replace TE sensor.
Check the same items as
[P22] trouble.
Check overcharge of refrigerant, clogging of cycle,
broken pipe, abnormal overload, etc.
Failure → Fault part repair.
Check overcharge of refrigerant, clogging of cycle,
broken pipe, abnormal overload, etc.
Failure → Fault part repair.
Eliminate interfering element.
Eliminate interfering element.
Heating season
Heating operation
Cooling season
Cooling operation
Is there anything which interfere
heat exchange of outdoor unit?
•
Clogging of heat exchanger
•
Short-circuit
Is there anything which interfere
heat exchange of indoor unit?
•
Choking up the filter
•
Clogging of heat exchanger
•
Short-circuit
YES
YES
YES
YES
YES
NO
NO
YES
NO
NO
YES
NO
NO
NO
NO
YES
YES
NO
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