IOM SYSCW AR R513A (IOM CWAR 02 N 1GB/12.21)

Table Of Contents
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30 SYSCW-AR R513A
1. For Single Phase versions, check the current available and the wiring.
2. Check for any loose or broken wiring and tighten or replace as required.
3. Check that the machine is not in alarm mode. Refer to the § ALARM CODES, page 31 for diagnosis.
4. Check the thermostats set temperature point.
5. The compressor may be grounded, in which case replace the compressor.
6. The internal compressor circuit is open circuit, perform a continuity test with an Ohmmeter. If the
circuit is open circuit, replace the compressor.
18.2. FAULT FINDING
18.2.1. 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 § ALARM CODES, page 31 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.
18.2.2. VENTILATION (FAN) MODE OPERATES BUT THE COMPRESSOR DOES NOT OPERATE
18.2.3. 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 inuence the reading.
2. Check the proper operation of the Return Air Temperature (RT) sensor, located on the n exchanger.
3. Airow is insufcient. Check for clogged lters. 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 ow on the water loop.
7. Check the conguration of the appliance.
18.2.4. INSUFFICIENT WATER FLOW AT THE LEVEL OF THE COAXIAL EXCHANGER.
1. Check for proper water circulation at the level of the water circulation pump.
2. If a valve is tted 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.
18.2.5. APPEARANCE OF WATER DROPLETS IN THE APPLIANCE
1. Check that the condensates drainage pipe is not blocked and that water drains away normally.
2. Check the correct operation of the condensates tray anti-overow oat (Refer to the § ALARM
CODES, page 31).
3. Check that the oat moves freely on its rod. If this is not the case, clean the tray and the oat.
4. Check the cleanliness of the lters.