LG ATNH09GRLE2 Svc Manual page 105

4. Trouble Shooting
6.7 Troubleshooting Outdoor Error
CH 23 (DC Link Voltage Low)
Items
Purpose
Condition for Generation Detected DC Link Voltage is less than the standard.
Installation
Expected
Causes
PCB
Assembly
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Only for training and service purposes
Securing the credibility of the compressor lifetime against the generation
of over-current at the compressor part in the DC Link Low Voltage
condition.
Installation fault and input of low-voltage power
Damage of DC link voltage detection circuit and reactor terminal
connection error
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