LG ACHH017VBAB Installation And Owner's Manual page 120

TROUBLESHOOTING GENERAL ERRORS
Symptom
Evaporation
pressure is
low and the
product con-
stantly stops.
Condensation
pressure is
high and the
product con-
stantly stops.
Product
vibrates loud-
ly.
Resonance
sound
High frequen-
cy wave
noise from
front side of
product
Constantly
hunting for
cold water
temperature
Evaporation
pressure is
high
120
Potential cause
Insufficient refrigerant
Insufficient cold water
Outdoor temperature is high
Alien particles accumulated
on the condenser
Fan defect
Fan-motor connecting bolt is
loose
Motor-mount motor assembly
is loose
Fan is not balanced
Compressor assembly bolt is
loose
Frame assembly bolt is loose
Motor bearing is burnt
Rubber fixed condition of
motor mount is defective
Pipe vibration defect around
compressor
Defect in heat emitting fan in
control box
Insufficient cold water
Temporary rise in cold water
temperature due to abnormal
increase in load
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Potential solution
Check for leakage and refill refrigerant
Check cold water system (Ensure rated flow)
- Is the valve of cold water system closed?
- Is the pressure difference between inlet and
outlet of cold water system appropriate?
- Is the air of cold water system cold?
Check whether outdoor temperature is within
operating range
Clean condenser
Replace fan
Check assembly condition and tighten bolt
Check assembly condition and tighten bolt
After checking fan rotation range, replace fan
If the assembly bolt/nut is loose, tighten it.
Check assembly condition and tighten bolt
Check for abnormal noise in motor (Noise in
multiple of RPM) and replace motor
Replace motor mount
Replace anti-vibration rubber attached on pipe
Clean part around heat emitting fan
Check cold water system (Ensure rated flow)
- Is the valve of cold water system closed?
- Is the pressure difference between inlet and
outlet of cold water system appropriate?
- Is the air of cold water system cold?
- Is the cooling load within appropriate range?
It is not abnormal.
But, check if it is within operating range.