SS-SVX07B-E4
25
Maintenance
Symptoms
Possible causes
Checks
Corrective action
The system operates
for too long or
continuously.
A. Control switch no longer responds to the
ambient temperature.
1. Check operation and connections of
the control switch.
1. Replace the control switch if it is defective.
B. Loss of refrigerant fluid.
1. Check there are no leaks in the system. 1. Repair and recharge.
C. Insufficient ventilation.
1. Check the air circulation in the
condenser.
1. Make sure air circulation is satisfactory.
Move the outdoor unit if necessary.
D. Incorrectly adjusted control switch.
1. Check the set point.
1. Adjust or replace if defective.
System operates in
short cycles.
A. Defective control switch
1. Check operation of the control switch. 1. Replace if defective.
B. Insufficient air circulation.
1. Check air circulation in the indoor and
outdoor units.
1. Clean the coil and filter if necessary.
C. Insufficient or excess refrigerant fluid.
1. Check if there are leaks or excess
pressure.
1. Repair if there are leaks. Add or remove
refrigerant fluid.
D. Incorrect electric power supply.
1. Check the electric power supply.
1. Find cause and stabilise the power supply.
Internal coil frozen.
A. Insufficient refrigerant fluid.
1. Check if there are leaks in the system. 1. Repair the leak and recharge.
B. Insufficient air circulation.
1. Check the filter.
1. Clean and put back in position.
2. Check the fin block.
2. Clean the fins. If the filter is missing, install
one.
3. Check the fan.
3. Fan free on the bearing, tighten the fixing
screws - connection fault, find the cause
and repair.
C. Defective anti-frost sensor.
1. Check the sensor.
1. Replace if necessary.
Unit is noisy
A. Defective installation.
1. Check installation of the compressor
and motor.
1. Tighten any loose components.
2. Check the fan position.
2. If the fan is rubbing against a part, re-align
it.
3. Check for vibrations of piping and
crankcase.
3. Find the cause and repair.
4. Check positioning of unit concerning
noise and vibrations.
4. Find the cause and repair.
B. Motor bearings are worn.
1. Check the motor.
1. Replace the motor if necessary.
C. Noisy compressor.
1. Check if the compressor is losing oil.
1. Locate the leak, repair and add oil.
D. Excess refrigerant fluid or oil.
1. Remove the excess charge.
Содержание MCD 048
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