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Check
code
[P05]
[P15]
Outdoor
LED display
<Display 1> <Display 2>
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<Display 1> <Display 2>
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Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[Power supply error (Voltage error)]
[Gas leak detection]
Confirm electric construction, etc.
Check outdoor P.C. board (MCC-1600).
Defect → Replace
Correct wiring.
YES
YES
NO
NO
Is there no open phase
of the power supply?
Is there no down or up
of power supply voltage?
(AC342 to 457V)
[P07] <Display 1> <Display 2>
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[Heat sink overheat error]
Check outdoor P.C. board (MCC-1596).
Defect → Replace
Remove blocking matter.
Correct short-circuit.
YES
YES
NO
NO
Apply radiation grease
to objective part.
Retightening of screws.
Is not the ventilation flue
of the heat sink blocked?
Is not the fan blocked?
(Short-circuit, etc.)
Is there no loosening of
screws of motor drive element of
outdoor P.C. board (MCC-1596) Q201?
Did not forget to apply radiation grease
to rear side of Q201?
Open valve fully.
Correct and replace piping.
Correct connector.
Sensor error → Replace
Check outdoor P.C. board (MCC-1599).
Defect → Replace
Correct defective position.
Replace defective part.
Repair defective position.
Recharge refrigerant.
Error
OK
YES
YES
YES
YES
NO
NO
NO
NO
Is there no crushed pipe?
Is valve fully opened?
Is PMV normal?
Check temp. sensor.
TD sensor CN603, TS sensor CN600
Is there no gas leak?
Is refrigerant charge amount adequate?
Check outdoor P.C. board.
Defect → replace
Replace coil of 4-way valve.
Temperature sensor check
TE sensor CN601
TS sensor CN600
Indoor TC sensor
Defect → Correct and repair
Check 4-way valve.
Defect → Replace
YES
YES
NO
NO
Error
OK
Check operation of
outdoor I/F (CDB) P.C. board.
Is power supplied
to 4-way valve coil?
Is operation of
4-way valve normal?
(Check pipe temp., etc. in
cooling/heating operation.)
[P19] <Display 1> <Display 2>
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[4-way valve inverse error]