Service manual

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Pc>3.48MPa
Pc>3.48MPa
Pc>3.58MPa
Pc<3.2MPa
Pc>3.53MPa
INV upper limit frequency :
3-step / 10 sec down from
current compressor frequency
INV upper limit frequency:
1-step / 20 sec up from current
compressor frequency
Pc: HP pressure sensor detection
value for each outdoor unit
INV upper limit frequency = 210 Hz
High pressure not limited
High pressure limited
High pressure standby
When occurring 3 times within 30
min., HPS is activated without high
pressure standby, thus outputting
the malfunction code “E3”.
STD compressor
standby for 5 mins
Pc: HP pressure sensor detection
value for master unit
When occurring 3 times within 30
min., HPS is activated without high
pressure standby, thus outputting the
malfunction code “E3”.
High pressure standby
Master unit: 52 Hz + OFF + OFF
Slave unit: All units stop.
High pressure limited
Lower-priority compressor stops.
High pressure not limited
Pc>3.38MPa
Pc>3.38MPa
Pc>3.49MPa
Pc<3.0MPa
Pc>3.58MPa