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Reset the power supply
and then perform test run
matching to the season.
Open valve fully.
Check outdoor fan.
Defect → Replace, retightening
Replace
sensor.
Check indoor P.C. board.
Defect → Replace
Repair defective position.
Is valve fully opened?
Is there no crack or
loosening of outdoor fan?
Does not the outdoor fan
perform abnormal operation?
Does indoor fan
normally operate?
Are indoor fan motor
and connector normal?
Is there no problem
on outdoor TL sensor?
(Measurement of resistance value)
Are resistance values
of indoor TC and TCJ
sensors normal?
Replace sensor.
Check the same items as
[P22] error.
Check overcharge of refrigerant, clogging of cycle,
broken pipe, abnormal overload, etc.
Defect → Correct defective position.
Check overcharge of refrigerant, clogging of cycle,
broken pipe, abnormal overload, etc.
Defect → Correct defective position.
Eliminate interfering element.
Eliminate interfering element.
Heating season
Heating operation
Cooling season
Cooling operation
Is there no element
which interfere heat exchange
of outdoor unit?
• Clogging of heat exchanger
• Short circuit
Is there no element which
interfere heat exchange of indoor unit?
• Clogging of filter
• Clogging of heat exchanger
• Short circuit
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
YES
NO
NO
NO
NO
NO
NO
NO
Check
code
[P20]
Outdoor
LED display
<Display 1> <Display 2>
¡¡
¡ ¥
ll
¡ ¥
¡
l
¡
l
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[High pressure protective operation]