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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
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 input overcurrent
2
2
1
(RMS) error.
Slave1 outdoor unit inverter PCB input overcurrent
2
2
2
(RMS) error.
Slave2 outdoor unit inverter PCB input overcurrent
2
2
3
(RMS) error.
Low or high DC voltage sensed at the master outdoor
2
3
1
unit inverter compressor DC link.
Low or high DC voltage to the slave1 outdoor unit invert-
2
3
2
er compressor DC link.
Low or high DC voltage to the slave2 outdoor unit invert-
2
3
3
er compressor DC link.
2
4
1 Master outdoor unit high pressure switch error.
2
4
2 Slave1 outdoor unit high pressure switch error.
2
4
3 Slave2 outdoor unit high pressure switch error.
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.
For detailed information on how to troubleshoot each error, see the Multi V Service Manual on www.lghvac.com.
Description
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
ERROR CODE TABLES
Details
• Detected by the CT sensor on the IGBTM 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:
143A for minimum of 3µs; For 460V: 80A for minimum of 3µs.
• Overcurrent of outdoor unit inverter board PCB.
• Under voltage.
• Refrigerant flow restriction from defective EEV.
• Refrigerant charge is too high (overcharged).
There is a capacitor that is not working properly, or the volt-
age at the capacitor is out of range. System shut off because
outdoor unit inverter compressor 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.
• No DC voltage charge on inverter PCB, when over 1,000V DC.
• Over 780V DC voltage was applied to inverter PCB.
• Improper wiring at DC link terminal or disconnected contact.
• Damaged electrical condenser component (serving capacitor)
on inverter driver board.
• Improper input voltage (R,S,T,N) or power wiring (no N phase).
System has been turned off by the master outdoor unit high
pressure switch.
System has been turned off by the slave1 outdoor unit high
pressure switch.
System has been turned off by the slave2 outdoor unit high
pressure switch.
Master outdoor unit has an input voltage of ≤140V or ≥300V
(for 208-230V units), or an input voltage of ≤414V or ≥528V (for
460V units).
Slave1 outdoor unit has an input voltage of ≤140V or ≥300V
(for 208-230V units), or an input voltage of ≤414V or ≥528V (for
460V units).
Slave2 outdoor unit has an input voltage of ≤140V or ≥300V
(for 208-230V units), or an input voltage of ≤414V or ≥528V (for
460V units).
Inverter compressor failed to start.
• Compressor defect and restriction in refrigerant piping are
possible causes.
161
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