SystemAir SYSHRW 096, Installation And Maintenance Manual

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31 SysHrw
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 "Alarm codes" chart for diagnosis.
4. Check the thermostat’s 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.
18.2.2. 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 influence the reading.
2. Check the proper operation of the Return Air Temperature (RT) 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.
18.2.4. 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.
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-overflow float (Refer to «Alarm codes»
chart).
3. Check that the float moves freely on its rod. If this is not the case, clean the tray and the float.
4. Check the cleanliness of the filters.
18.2.6. APPEARANCE OF ABNORMAL NOISES AND VIBRATIONS IN THE CASING
1. Check that the turbine is not rubbing against the scroll and that the latter is not damaged. Replace as
required.
2. Check that the turbine has not worked loose on its shaft. Centre the turbine and tighten it as
required.
3. Check that the compressor is mounted correctly on its shock pads.
4. Check that no part of the turbine rubs against the compressor or any other surface. Reposition
slightly as required.
5. Check that all the attachment screws are tightened properly.
6. Check that air is not being sucked into the hydraulic system.
7. Test that the relays open and close correctly. Replace as required.