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[F23]
Outdoor
LED display
<Display 1> <Display 2>
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Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[PS sensor error]
Check outdoor P.C. board (MCC-1599).
Defect → Replace
[F31] <Display 1> <Display 2>
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[EEPROM error]
[H01] <Display 1> <Display 2>
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¥
[Compressor break down]
Correct and clear the cause.
Check wire connection
and correct it.
Correct power supply line.
Check outdoor P.C. board (MCC-1596).
Defect → Replace
Is it not abnormal overload?
Is power supply voltage normal?
AC342 to 457V
Is wire connection normal?
Compressor lead
(Board side, Compressor side),
Reactor lead, Power supply lead
YES
YES
YES
NO
NO
NO
∗
Pressure by pressure gauge (Check joint)
Pressure display on LED display
Output power of I/F (CDB) P.C. board
If
and
,
and
are different,
an error of the pressure sensor is considered.
If
and
are different, check I/F P.C. board.
Connector: CN606, White
Check compressor.
Sensor error
Are the output current characteristics
of Ps sensor normal?
Check 4-way valve.
Does not refrigerant bypass
from discharge port to suction port
of 4-way valve?
YES
YES
NO
Correct connection of connector.
Is connector of
Ps sensor correctly connected?
YES
NO
NO