LG AK-C3608H00, Installation Manual

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TROUBLE SHOOTING
23
ENGLISH
Symptom Causes Check & Corrective measure
Taking more time for
the pumpdown cycle,
cooling coil ices up
1. Leaky pumpdown solenoid
valve
1. Check pumpdown solenoid valve and
replace it.
Noisy unit
1. Improper installation
2. Improper vibration isolators
3. Loose parts or mountings
4. Tubing rattle
5. Bent fan blade causes
vibration
6. Defective bearings
7. Blet tension is high
8. Blower motor pulley is not
aligned
1. Check and correct it properly.
2. Check and correct it properly.
3. Check and tighten.
4. Tighten the pipe support.
5. Check the balance, alignment, bracket, etc.
Correct it / replace it.
6. Replace the motor.
7. Adjust belt tension.
8. Align pulley.
Unit operation noise
listening inside the
building
1. Improper installation
2. Improper vibration isolators
3. Abnormal noise in the unit
4. Unit too close to the slab/wall
openings
5. Duct design (high static)
6. Wooden packing beneath the
compressor is not removed
1. Check and correct it.
2. Check and correct it.
3. Verify the reason of noisy unit & correct it.
4. Verify the design / Relocate the unit if
necessary.
5. Check & verify the design.
6. Remove wooden packing (if any).
Compressor not
working
1. Low voltage
2. Single phase failure
3. Bunred wirings
4. Overload protector open
5. Defective contactor
6. Burned compressor motor
winding
7. Damaged (stuck) compressor
1. Rectify the reason & correct it.
2. Check the compressor amperage each
phase.
3. Check and correct it.
4. Check and verify the reason.
5. Check and replace it.
6. Check and replace it.
7. Check and replace it.
Circuit breaker of the
unit trips
1. Burned wirings
2. Grounded wirings
3. Faulty field wiring
4. Grounded compressor/blower
motor
5. Undersize circuit breaker
1. Check and correct the wiring.
2. Check meggar test.
3. Check wiring against diagram.
4. Replace it, if required.
5. Check the circuit breaker ratings.