LG AK-C3608H00, Руководство по установке

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22
TROUBLE SHOOTING
ENGLISH
Symptom Causes Check & Corrective measure
Unit works
continuously, no
sufficient cooling
1. Low suction pressure
2. High discharge pressure
3. Less air quantity
4. Cooling coil ices up
5. Second stage (if exists) not
working.
6. Serving large area
1. Verify the reason for low suction pressure
(refer to symptom for "low suction
pressure").
2. Verify the reason for high discharge
pressure (refer to symptom for "high
discharge pressure").
3. Refer to symptom for "blower works, less
air".
4. Determine the reason (refer to symptom for
"cooling coil ice up") & correct it.
5. Set the thermostat to lower
temperature(21 °C) / or verify the reason.
6. Check the design.
Unit not cooling
properly during night
time
1. Low ambient condition
2. Safety low pressure switch
open due to low suction
pressure.
3. Fan cycling (whenever
applicable) setting low
4. Thermostat setting too low
5. Cooling coil ices-up
6. Less air quantity
1. Check and verify the ambient temperature.
2. Check the reason and correct it (refer to
symptom for "low suction pressure").
3. Adjust the fan cycling.
4. Adjust the thermostat setting.
5. Verify the reason and correct it (refer to
symptom for "cooling coil ice up").
6. Verify the reason and correct it (refer to
symptom for "blower works, less air").
Not sufficiently
cooling during
daytime
1. High discharge pressure
2. High thermostat setting
3. Serving large area
4. Less air quantity
5. High ambient condition
6. Dirty condenser
1. Check and verify the reason for high
discharge pressure (refer to symptom for
"high discharge pressure").
2. Adjust thermostat.
3. Check the design / unit selection.
4. Check and verify the reason (refer to
symptom for "blower works, less air").
5. Check the ambient condition.
6. Clean it.
Cooling coil ices up
1. Less freon
2. Less air quantity
3. Dirty filter
4. Dirty cooling coil
1. Check for gas leak & charge freon as
required.
2. Determine the reason and correct it (refer
to symptom for "high discharge pressure").
3. Clean it.
4. Clean it.
Unit is not restarting
(after a cut-off) 1. Safety circuit open due to low
pressure switch
1. Rectify the reason of low suction pressure
(refer to symptom for "low suction
pressure").
Unit is taking long
time to restart
1. Thermostat in cold location 1. Shift the location as required.
Compressor goes
lockout (pump down
system) 1. Imbalance freon
2. Malfunctioning pumpdown
solenoid valve
1. Check freon charge and confirm FLA.
2. Check pumpdown solenoid valve operation.