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Check
code
[H02]
[H03]
Outdoor
LED display
<Display 1> <Display 2>
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<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.)
[Compressor lock]
[Current detection circuit error]
[Power supply error (Vdc)] → Refer to [P05] column.
Check wire connection
and correct it.
Correct power supply line.
Is compressor normal?
Is there no refrigerant stagnation?
Does PMV normally operate?
Is power supply voltage normal?
AC342 to 457V
Is wire connection normal?
Compressor lead
(Board side, Compressor side),
Reactor lead, Power supply lead
Compressor lock → Replace
Check outdoor P.C. board.
Defect → Replace
Check TE, TS sensors and PMV.
Defect → Replace
Check outdoor P.C. board (MCC-1596).
Defect → Replace
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Check crushed or broken pipe.
Defect → Correct and Replace
Correct defective position.
Replace defective part.
Open valve fully.
Repair defectives position.
Recharge refrigerant.
Check outdoor P.C. board (MCC-1599).
Defect → Replace
Correct connector.
Case thermostat error → Replace
Is valve fully opened?
Is PMV normal?
Is there no gas leak?
Is it not refrigerant shortage?
Is cooling/heating operation available
when short-circuiting case thermostat?
Are CN609 connection
and case thermostat normal?
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
<Display 1> <Display 2>
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[Case thermostat operation][H04]
Check outdoor P.C. board (MCC-1596).
Defect → Replace