Self-diagnosis function
Display Title Cause of Error
Outdoor unit related error
1 1 6
1
Master Outdoor Unit Oil Level Sensor
Error
Oil Level Sensor of Master Outdoor Unit is open or short
2
Slave1 Outdoor Unit Oil Level Sensor
Error
Oil Level Sensor of Slave1 Outdoor Unit is open or short
3
Slave2 Outdoor Unit Oil Level Sensor
Error
Oil Level Sensor of Slave2 Outdoor Unit is open or short
4
Slave3 Outdoor Unit Oil Level Sensor
Error
Oil Level Sensor of Slave3 Outdoor Unit is open or short
1 4 5
1
Master outdoor unit Main Board -
External Board communication Error
Master outdoor unit Main Board - External Board communica-
tion Error
2
Slave1 outdoor unit Main Board -
External Board communication Error
Slave1 outdoor unit Main Board - External Board communica-
tion Error
3
Slave1 outdoor unit Main Board -
External Board communication Error
Slave1 outdoor unit Main Board - External Board communica-
tion Error
4
Slave1 outdoor unit Main Board -
External Board communication Error
Slave1 outdoor unit Main Board - External Board communica-
tion Error
1 5 1 1
Failure of operation mode conversion at
Master Outside Unit
Failure of operation mode conversion at Master Outside Unit
1 8 0
1
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
2
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
3
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
4
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
1 8 0
1
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
2
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
3
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
4
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
1 8 1
1
Water temperature sensor error Water temperature sensor open/short
2
Water temperature sensor error Water temperature sensor open/short
3
Water temperature sensor error Water temperature sensor open/short
4
Water temperature sensor error Water temperature sensor open/short
1 8 2
1
Communication error between MICOMs Communication error between main MICOM and sub MICOM
2
Communication error between MICOMs Communication error between main MICOM and sub MICOM
3
Communication error between MICOMs Communication error between main MICOM and sub MICOM
4
Communication error between MICOMs Communication error between main MICOM and sub MICOM
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