3. Self-diagnosis function
Error Indicator
• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of
outdoor unit control board as shown in the table.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
- 1st,2nd,3rd LED of 7-segment indicates error number, 4th LED indicates unit number. Indicates unit number.
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2
1051 : No.105 error of master unit
❈ Refer to the DX-Venitilation manual for DX-Venitilation error code
Display Title Cause of Error
Indoor unit related error
0 1 -
Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short
0 2 -
Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short
0 3 -
Communication error:wired remote controller ↔
indoor unit
Failing to receive wired remote controller signal in indoor unit
PCB
0 4 -
Drain pump Malfunction of drain pump
0 5 -
Communication error : outdoor unit ↔ indoor unit
Failing to receive outdoor unit signal in indoor unit PCB
0 6 -
Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short
0 7 -
Different operation mode Operation mode between indoor unit and outdoor unit is different
0 9 -
Indoor EEPROM Error
In case when the serial number marked on EEPROM of Indoor
unit is 0 or FFFFFF
1 0 -
Poor fan motor operation
Disconnecting the fan motor connector/Failure of indoor fan
motor lock
1 1 -
Communication error: indoor unit ↔ main PCB
of outdoor.
PCB Damage
Outdoor unit related error
2 1
1
Master outside unit inverter compressor IPM Fault Master outside unit inverter compressor drive IPM error
2
Slave1 outside unit inverter compressor IPM Fault Slave1 outside unit inverter compressor drive IPM error
3
Slave2 outside unit inverter compressor IPM Fault Slave2 outside unit inverter compressor drive IPM error
4
Slave3 outside unit inverter compressor IPM Fault Slave3 outside unit inverter compressor drive IPM error
2 2
1
Inverter Board Input Over Current(RMS) of
Master outside Unit
Master Outside Unit Inverter Board Input Current excess (RMS)
2
Inverter Board Input Over Current(RMS) of
Slave1 outside Unit
Slave1 Outside Unit Inverter Board Input Current excess (RMS)
3
Inverter Board Input Over Current(RMS) of
Slave2 outside Unit
Slave2 Outside Unit Inverter Board Input Current excess (RMS)
4
Inverter Board Input Over Current(RMS) of
Slave3 outside Unit
Slave3 Outside Unit Inverter Board Input Current excess (RMS)
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