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