Roof-top air-conditioning system CC8 6 Maintenance
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2. Condition of hoses:
– No cuts, squeezing, blisters, chafing
– Clamps and quick-release couplings undamaged
– Openings in metal undamaged.
3. Condition of air distribution panel or air ducting system:
– Attachment points / screws secure
– Ventilation switches serviceable
– Circulating air filter clean.
4. Condition of compressor:
– Hose connections undamaged and secure
– Attachment parts / screws secure.
V-belt tension o.k.
V-belt and V-belt pulley undamaged
Magnetic clutch and electrical connection undamaged.
6.6 Troubleshooting
6.6.1 General
1. A systematic approach is advisable for troubleshooting. Appropriate action must be undertaken as described below
for faults of a general nature or when normal conditions are not obtained during the pressure test.
2. Certain faults can only be located and remedied by skilled personnel using special tools.
3. If the compressor is damaged (e.g. defective valve plates) it is absolutely essential to replace the expansion valve
as a possible cause of the malfunction.
6.6.2 Electrical system
The individual circuits must be systematically checked to isolate the fault with the aid of the applicable circuit diagram.
Above all plug connections, switches, relays, etc., should be checked for continuity.
The following possibilities must always be checked and excluded as a possible cause of the malfunction:
– Defective fuses
– Corrosion on connector contacts
– Loose contact on connector
– Wrong crimping on connector
– Corrosion on wiring and fuses
– Corrosion on battery terminals
6.6.3 Air-conditioning system
– Defective evaporator or condenser fan
– Contaminated or clogged air filters, evaporator or condenser fins
– Loss of refrigerant or refrigerant level in system too low
If the system is deactivated continuously, we recommend that it be checked by an authorized workshop.
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