Troubleshooting Outdoor Error - LG ATNH09GRLE2 Svc Manual

4. Trouble Shooting

6.7 Troubleshooting Outdoor Error

CH 21 (DC Peak / Comp IPM Fault)
Items
Purpose
Condition for Generation Generation when over-current is detected in IPM.
Installation &
Overload
Expected
Compressor
Causes
PCB As-
sembly
Others
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Only for training and service purposes
Protection of the IPM parts and compressor in the PCB assembly from
over-current.
Outdoor device shielding, closing of a SVC valve, under/over charging
of refrigerant, infiltration of water into refrigerant, outdoor fan fault, EEV
(Electric Expansion Valve) fault, fault of a temperature sensor or its con-
nection, blocking of an indoor device filter, and bending/blocking of a
pipe.
Open/Short of the coil in the compressor, insulation breaking between
the coil in the compressor and the pipe or panel, damage of compressor
with abrasion, and compressor connection fault.
IPM part fault, fault-signal detection circuit fault, compressor current
detection circuit fault, and DC link detection circuit fault.
Improper power input, IPM connection fault, and insufficient distance
between heat sink and control panel.
Contents
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