83003702.K Operating Instruction
Type KPC 108-L-U/S
page 27
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Preventiv Maintenance
Caution! Work on electric and refrigerant circuits should only be performed by qualified operatives.
Observe the safety rules!
Service and maintenance should always be carried out by skilled technician and, where possible, under a maintenance
contract. Nevertheless, certain routine work can be effectively carried out by non-specialists and may become
important factor in preventing future damage to the plant.
Weekly Check
1. Check the working of the compressor:
Look out for too high head temperatures or suspicious noises.
2. Check the R134a through the sight-glass
3. Check that fans are rotating normally and not making unusual noises
4. Check that the temperatures is within the accepted limit.
If it is not, check that all the separate elements of the unit are working, by switching them on individually.
If they are not, see the “ Trouble shooting”
Two –monthly Check
a.
The air conditioner unit:
1.
Check the air filter and replace it if necessary
2.
Check the air circulation fans and check that the bearings are not heating up
3.
Check that the heating elements work, by switching them to “MAN”
4.
Switch cooling system to “MAN” and check that it is in full working order
5.
Check the compressor temperature.
6.
Check there is no ice accumulations on the evaporator.
7.
Check that the warning lights on the display panel are working properly.
8.
Check the main voltage between all the phases
9.
Check the principal and secondary circuits thoroughly, inspect the overload cut-outs and thermal
relays.
10.
Pull out the fuses to check that the safety system works.
