Self-Diagnosis Function; Error Indicator; Error Display Method - LG MULTI V ARWN80LA2 Product Data

10.7 Self-Diagnosis Function

Error Indicator

• This function indicates type 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 outside
unit control board as shown in the table.
• If more than two troubles occur simultaneously, low number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.

Error display method

1st and 2nd LED of 7-segment refers to the error number and the 3rd LED refers to the outside unit number.
Ex) 011: Error No. 1 of outside unit No. 1
011 051: Error No. 105 of outside unit No. 1
Refer to the DX-Venitilation manual for DX-Venitilation error code
Display
number
0 1 - Indoor unit air temperature sensor error
0 2 - Indoor unit pipe inlet temperature sensor error
Communication error between wired remote con-
0 3 -
troller and indoor unit
0 4 - Indoor unit drain error
Communication error between outside unit and
0 5 -
indoor unit
0 6 - Indoor unit pipe outlet temperature sensor error
0 7 - Different mode operation
Indoor unit EEPROM error
0 9 -
1 0 - Indoor unit BLDC motor feedback signal error
1 7 - Inlet Air temperature sensor of FAU
1 Master outside unit inverter compressor IPM fault
2 1 2 Slave1 outside unit inverter compressor IPM fault
3 Slave2 outside unit inverter compressor IPM fault
Master outside unit inverter compressor DC link
1
under-voltage
2 3 2 Slave1 outside unit inverter compressor DC link
under-voltage
Slave2 outside unit inverter compressor DC link
3
under-voltage
Master outside unit high pressure switch
1
Slave1 outside unit high pressure switch
2 4 2
Slave2 outside unit high pressure switch
3
Master outside unit input voltage over-voltage
1
/under-voltage
Slave1 outside unit input voltage over-voltage
2 5 2
/under-voltage
Slave2 outside unit input voltage over-voltage
3
/under-voltage
Installation
Error item
Indoor unit air temperature sensor disconnection or short circuit
Indoor unit pipe inlet temperature sensor disconnection or short circuit
Occurs when indoor unit communication signal is not received from the wired
remote controller
Drain pump and float switch error
When the indoor unit does not receive the outside communication signal con-
tinuously for 5 minutes or more
Indoor unit pipe outlet temperature sensor disconnection or short circuit
When operated in different operating mode than the one first operated
Communication error between MICOM and EEPROM or when there is
no indoor unit EEPROM data
When motor connector is removed or defective
Air temperature sensor of indoor unit is open or short
Master outside unit inverter compressor drive IPM error
Slave1 outside unit inverter compressor drive IPM error
Slave2 outside unit inverter compressor drive IPM error
DC voltage is not charged after master outside unit operating relay is turned
on
DC voltage is not charged after slave1 outside unit operating relay is turned on
DC voltage is not charged after slave2 outside unit operating relay is turned on
Compressor maintenance by master outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of master outside unit
Compressor maintenance by slave1 outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of slave1 outside unit
Compressor maintenance by slave2 outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of slave2 outside unit
Master outside unit input voltage is 487V and above or less than 270V
Slave1 outside unit input voltage is 487V and above or less than 270V
Slave2 outside unit input voltage is 487V and above or less than 270V
Root cause of error
52
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