LG Multi V5 Service Manual page 132

ERROR CODE TABLES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Table 74: Error Codes, continued.
Error Code
7 7 1 Master outdoor unit fan overcurrent error.
7 7 2 Slave1 outdoor unit fan overcurrent error.
7 7 3 Slave2 outdoor unit fan overcurrent error.
7 9 1 Master outdoor unit fan operation failure error.
7 9 2 Slave1 outdoor unit fan operation failure error.
7 9 3 Slave2 outdoor unit fan operation failure error.
1 Master outdoor unit main PCB onboard EEPROM error. • Verify the EEPROM is present and in the socket correctly.
8 6
8 6 2 Slave1 outdoor unit main PCB onboard EEPROM error.
8 6 3 Slave2 outdoor unit main PCB onboard EEPROM error.
8 7 1 Master outdoor unit fan PCB EEPROM error.
8 7 2 Slave1 outdoor unit fan PCB EEPROM error.
8 7 3 Slave2 outdoor unit fan PCB EEPROM error.
Communication error between master outdoor unit and
1 0 4 1
slave outdoor units.
Communication error between slave1 outdoor unit and
1 0 4 2
master and slave2 outdoor units.
Communication error between slave2 outdoor unit and
1 0 4 3
master and slave1 outdoor units.
Master outdoor unit fan PCB to inverter compressor
1 0 5 1
PCB communication error.
Slave1 outdoor unit fan PCB to inverter compressor
1 0 5 2
PCB communication error.
Slave2 outdoor unit fan PCB to inverter compressor
1 0 5 3
PCB communication error..
1 0 6 1 Master outdoor unit fan IPM error.
1 0 6 2 Slave1 outdoor unit fan IPM error.
1 0 6 3 Slave2 outdoor unit fan IPM error.
1 0 7 1 Master outdoor unit fan DC link low voltage error.
1 0 7 2 Slave1 outdoor unit fan DC link low voltage error.
1 0 7 3 Slave2 outdoor unit fan DC link low voltage error.
132
Description
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Details
Outdoor unit fan current is >10A (for 208-230V units) or 5A (for
460V units).
Slave1 outdoor unit fan current is >10A (for 208-230V units) or
5A (for 460V units).
Slave2 outdoor unit fan current is >10A (for 208-230V units) or
5A (for 460V units).
Master outdoor unit fan is experiencing first position sensor
failure.
Slave1 outdoor unit fan is experiencing first position sensor
failure.
Slave2 outdoor unit fan is experiencing first position sensor
failure.
• Check if all pins are in and are not bent.
• Check if notch in the chip lines up with the arrow on the
socket.
• Communication error between master outdoor unit fan MICOM
and EEPROM.
• Verify EEPROM is present and in the socket correctly.
• Communication error between slave1 outdoor unit fan MICOM
and EEPROM.
• Verify EEPROM is present and in the socket correctly.
• Communication error between slave2 outdoor unit fan MICOM
and EEPROM.
• Verify EEPROM is present and in the socket correctly.
Master outdoor unit main PCB is not receiving signals from
slave outdoor units.
Slave1 outdoor unit main PCB is not receiving signals from
master and slave2 outdoor units.
Slave2 outdoor unit main PCB is not receiving signals from
master and slave1 outdoor units.
Master outdoor unit fan PCB did not receive signal from inverter
compressor PCB.
Slave1 outdoor unit fan PCB did not receive signal from inverter
compressor PCB.
Slave2 outdoor unit fan PCB did not receive signal from inverter
compressor PCB.
Instant overcurrent (peak) of master outdoor unit fan IPM.
Instant overcurrent (peak) of slave1 outdoor unit fan IPM.
Instant overcurrent (peak) of slave2 outdoor unit fan IPM.
A capacitor that is serving the ODU fan inverter is not working
properly, or the voltage at the capacitor is out of range (low).
Start diagnosis at the inverter socket on the outdoor unit noise
filter PCB
• Outdoor unit fan DC link voltage is <50V for a minimum of
250μs (for both 208-230V and 460V units).
• Disconnected DC link.
• Damaged electrical condenser component (serving capacitor)
on inverter driver board.