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Master Outdoor Unit Inverter Compressor Start
2
6
*
Failure
Master outdoor unit inverter DC link over-voltage
2
8
*
error
Master Outdoor Unit Inverter Compressor Over
2
9
*
Current
Master Outdoor Unit Inverter Compressor1 High
3
2
*
Discharge Temperature
3
4
*
High Pressure of Master Outdoor Unit
3
5
*
Low Pressure of Master Outdoor Unit
Master Outdoor Unit Low Compression Ratio
3
6
*
Limited
Master Outdoor Unit Inverter Compressor CT
4
0
*
Sensor Fault
Master Outdoor Unit Inverter Compressor1
4
1
*
Discharge Temperature Sensor Fault
4
2
*
Master Outdoor Unit Low Pressure Sensor Fault
4
3
*
Master Outdoor Unit High Pressure Sensor Fault
4
4
*
Master Outdoor Unit Air Temperature Sensor Fault
Master Outdoor Unit Suction Temperature Sensor
4
6
*
Fault
Master Outdoor Unit Faulty IPM Temperature
4
9
*
Sensor
Omitting connection of R, S, T power of Master
5
0
*
Outdoor Unit
5
1
*
Excessive capacity of indoor units
Communication error : inverter PCB ' Main PCB
5
2
*
Communication error : indoor unit ' Main PCB of
5
3
*
Outdoor Unit
Communication error : Main PCB ' inverter PCB
5
7
*
Wrong setting between master and slave outdoor
5
9
*
unit
6
0
*
Inverter PCB EEPROM Error of Master Outdoor Unit
Master Outdoor Unit Inverter Heatsink High
6
2
*
Temperature
Master Outdoor Unit Inverter Heatsink Temperature
6
5
*
Sensor Fault
7
1
*
Inverter CT Sensor Error of Master Outdoor Unit
8
6
*
Master Outdoor Unit Main PCB EEPROM Error
Communication Error Between Master Outdoor
1
0
4
*
Unit and Other Outdoor Unit
1
1
3
*
Outdoor Unit Liquid pipe Temperature Sensor Error
Outdoor Unit Subcooling Outlet Temperature Sensor
1
1
5
*
Error
1
1
6
*
Outdoor Unit Oil Level Sensor Error
Outdoor unit Main Board - External Board
1
4
5
*
communication Error
1
5
0
*
Outdoor Unit Discharge Superheat not satisfied
Failure of operation mode conversion at Outdoor
1
5
1
*
Unit
1
8
0
*
Plate type heat exchanger freeze prevention
1
8
1
*
Water outlet temperature sensor error
Outdoor unit External Board Main-Sub Micom
1
8
2
*
communication Error
1
8
7
*
Hydro - Kit P,HEX bursting error
1
8
8
*
Water inlet temperature sensor error
1
8
9
*
Flow switch error
Title
Cause of Error
The first start failure by Master Outdoor Unit Inverter Compressor
abnormality or Compressor locked
Compressor turned Off due to master outdoor unit inverter DC
voltage over-charge
Master Outdoor Unit Inverter Compressor Fault or some bits in
pipe.
Master Outdoor Unit Inverter Compressor1 High Discharge
Temperature
High Pressure of Master Outdoor Unit
Low Pressure of Master Outdoor Unit
Master Outdoor Unit stayed under low Compression limit for 3
minutes
Master Outdoor Unit Inverter Compressor CT Sensor open or short
Master Outdoor Unit Inverter Compressor Discharge Temperature
Sensor open or short
Master Outdoor Unit Low Pressure Sensor open or short
Master Outdoor Unit High Pressure Sensor open or short
Master Outdoor Unit Air Temperature Sensor open or short
Master Outdoor Unit Suction Temperature Sensor open or short
Master Outdoor Unit IPM Temperature Sensor short/open
Omitting connection of Master outdoor unit
Excessive connection of indoor units compared to capacity of
Outdoor Unit
Failing to receive inverter signal at main PCB of Master Outdoor
Unit
Failing to receive indoor unit signal at main PCB of Outdoor Unit.
Failing to receive signal main PCB at inverter PCB of Master
Outdoor Unit
When geothermal mode setting is different(Fn 2 setting)
Access Error of Inverter PCB of Master Outdoor Unit
System is turned off by Master Outdoor Unit Inverter Heatsink High
Temperature
Master Outdoor Unit Inverter Heatsink Temperature Sensor open
or short
Inverter CT Sensor open or short of Master Outdoor Unit
Communication Fail Between Master Outdoor Unit Main MICOM
and EEPROM or omitting EEPROM
Failing to receive Slave Unit signal at main PCB of Master
Outdoor Unit
Liquid pipe temperature sensor of Outdoor Unit is open or short
Outdoor Unit Subcooling Outlet Temperature Sensor Error
Oil Level Sensor of Outdoor Unit is open or short
Outdoor unit Main Board - External Board communication Error
Outdoor Unit Compressor Discharge Superheat not satisfied during
5 Min.
Failure of operation mode conversion at Outdoor Unit
Plate type heat exchanger freeze prevention error
Water outlet temperature sensor open or short
Outdoor Unit Main Board Main-Sub Micom communication failed
Inlet water temperature is below 5 degree or water temperature
error during defrosting operation.
Water inlet temperature sensor open or short
Heat water not supplied or flow rate is insufficient
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