LG Multi V5 Service Manual page 128

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 70: Error Codes, continued.
Error Code
Master outdoor unit inverter board IPM fault error;
2 1 1 Inverter driver detects overcurrent; Error code is deter-
mined by overcurrent in any one phase of compressor.
Slave1 outdoor unit inverter board IPM fault error;
2 1 2 Inverter driver detects overcurrent; Error code is deter-
mined by overcurrent in any one phase of compressor.
Slave2 outdoor unit inverter board IPM fault error;
2 1 3 Inverter driver detects overcurrent; Error code is deter-
mined by overcurrent in any one phase of compressor.
Master outdoor unit inverter PCB AC input overcurrent
2 2 1
(RMS) error.
Slave1 outdoor unit inverter PCB AC input overcurrent
2 2 2
(RMS) error.
Slave2 outdoor unit inverter PCB AC input overcurrent
2 2 3
(RMS) error.
Low DC voltage sensed at the master outdoor unit
2 3 1
inverter compressor DC link.
Low DC voltage sensed at the slave1 outdoor unit
2 3 2
inverter compressor DC link.
Low DC voltage sensed at the slave2 outdoor unit
2 3 3
inverter compressor DC link.
System has been turned off by the master outdoor unit
2 4 1
high pressure switch.
System has been turned off by the slave1 outdoor unit
2 4 2
high pressure switch.
System has been turned off by the slave2 outdoor unit
2 4 3
high pressure switch.
Input voltage to the master outdoor unit is too high or
2 5 1
too low.
Input voltage to the slave1 outdoor unit is too high or
2 5 2
too low.
Input voltage to the slave2 outdoor unit is too high or
2 5 3
too low.
2 6 1 Master outdoor unit inverter compressor operation error.
2 6 2 Slave1 outdoor unit inverter compressor operation error.
2 6 3 Slave2 outdoor unit inverter compressor operation error.
2 9 1 Master outdoor unit inverter compressor overcurrent error. • Outdoor unit inverter compressor current draw is too high.
2 9 2 Slave1 outdoor unit inverter compressor overcurrent error.
2 9 3 Slave2 outdoor unit inverter compressor overcurrent error.
128
Description
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Details
• Detected by the CT sensor on the IGBT PC board.
• Overcurrent in compressor UVW phases.
• Damaged compressor.
• Damaged IPM on inverter board.
• Compressor disconnected.
• Damaged inverter board – input voltage too low. For 208-
230V: On 068 compressors = 143A for a minimum of 3μs;
on 048 compressors = 96A for a minimum of 3μs. For 460V:
On 068 compressors = 80 A for a minimum of 3μs; On 048
compressors = 56A for a minimum of 3μs.
• Overcurrent of outdoor unit inverter board PCB.
• Under voltage.
• Refrigerant flow restriction from defective EEV.
• Refrigerant charge is too high (overcharged).
System shut off because the DC link voltage fell below 50V (for
both 208-230V and 460V units), or exceeded 550V (for 208-
230V units) or 1,000V (for 460V units) for a minimum of 250μs.
• Start diagnosis at the inverter socket on the outdoor unit noise
filter PCB.
• There is a capacitor that is not working properly, or the voltage
at the capacitor is out of range.
• Disconnected DC link.
• Damaged electrical condenser component (serving capacitor)
on inverter driver board.
Master outdoor unit high pressure switch error.
• Check the connection on the outdoor unit PCB.
• Use chart in Troubleshooting section of the manual to check
signal output (V DC) versus actual pressure.
Slave1 outdoor unit high pressure switch error.
• Check the connection on the outdoor unit PCB.
• Use chart in Troubleshooting section of the manual to check
signal output (V DC) versus actual pressure.
Slave2 outdoor unit high pressure switch error.
• Check the connection on the outdoor unit PCB.
• Use chart in Troubleshooting section of the manual to check
signal output (V DC) versus actual pressure.
460V units).
460V units).
460V units).
Inverter compressor failed to start.
• Compressor defect and restriction in refrigerant piping are
possible causes.