Trouble Shooting; Fault Finding - Iom CWAR 01-N-3ALL Manuel D'installation Et De Maintenance

19. TROUBLE SHOOTING

19.1. FAULT FINDING

19.1.1. NEITHER THE FAN NOR THE COMPRESSOR OPERATE
1. The system is in alarm mode when the mains power supply is switched on. Check the points mentioned
in the "Alarm codes" chart for diagnosis.
2. Check the wiring of the remote control.
3. Check that the appliance is properly set in COOL, HEAT or FAN mode.
4. Check the condition of the fuse or the mains power supply. Check the compressor and fan wiring.
5. Check for any loose or broken wiring and tighten or replace as required.
6. The mains supply voltage is too low. If this is the case, check the supply conditions with the electricity
provider.
19.1.2. VENTILATION (FAN) MODES OPRATES BUT THE COMPRESSOR DOES NOT OPERATE
1. Check for any loose or broken wiring and tighten or replace as required.
2. Check that the machine is not in alarm mode. Refer to "Alarm codes" chart for diagnosis.
3. Check the thermostat's set temperature point.
4. The compressor may be grounded, in which case replace the compressor.
5. The internal compressor circuit is open circuit, perform a continuity test with an Ohmmeter. If the
circuit is open circuit, replace the compressor.
19.1.3. INSUFFICIENT COOLING OR HEATING PRODUCTION
1. Check that the thermostat is properly located in the zone to be heated or cooled and that it is not
near to a source of cold or heat that may influence the reading.
2. Check the proper operation of the Return Air Temperature (RAT) sensor, located on the fin exchanger.
3. Airflow is insufficient. Check for clogged filters. Clean and replace as required.
4. The cycle inversion valve may be defective and be creating a refrigerant by-pass. If the unit does not
produce heat, check the wiring of the inversion valve coil.
5. Check the proper operation of the pressure relief valve.
6. Measure the water flow on the water loop.
7. Check the configuration of the appliance.
19.1.4. INSUFFICIENT WATER FLOW AT THE LEVEL OF THE PLATE EXCHANGER.
1. Check for proper water circulation at the level of the water circulation pump.
2. If a valve is fitted to the water loop, check that it is open.
3. Check that air is not being sucked into the hydraulic system. Bleed the system if required.
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