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Check
code
[H03]
[H04]
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.)
[Current detection circuit error]
[Power supply error (Vdc)] → Refer to [P05] column.
[Case thermostat operation]
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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[Unset model type] : Only when service P.C. board is used[L10]
Check outdoor P.C. board (MCC-1596).
Defect → Replace
Cut jumper line according
to the explanation sheet packaged
with the service P.C. board.