Daily Maintenance And Repair; Daily Maintenance; Troubleshooting - Sinclair S therm Series Service Manual

5 Daily Maintenance and Repair

5.1 Daily Maintenance

In order to avoid damage of unit, all protecting devices in the unit have been set before packaging and
delivering, so the user can never adjust or remove them.
For the first startup of the unit or next startup of unit after long-period stop (above 1 day) by cutting off the power,
please electrify the unit in advance to preheat the unit for more than 8hr
Never put sundries on the unit and accessories. Keep dry, clean and ventilated around the unit.
Remove the dust accumulated on the condenser fin timely to ensure performance of unit and to avoid stop of
unit for protection.
In order to avoid damage of unit caused by blockage of water system, clean the filter in water system periodically
and frequently check water replenishing device.
In order to ensure anti-freezing protection, never cut off the power if ambient temperature is below zero in winter.
In order to avoid frost crack of the unit, water in the unit and pipeline system should be drained regularly. In
addition, open the end cap of water tank for drainage.
Never frequently make the unit on/off and close manual valve of water system during operation of unit by users.
Ensure frequently check the working condition of each part to see if there is oil stain at pipeline joint and charge
valve to avoid leakage of refrigerant.
If users are not able to handle the malfunction of the unit, please timely contact with authorized service center of
company.
The water pressure gage is installed in returning water line in the indoor unit, Please adjust the hydraulics
system pressure according to next item:
(1) If the pressure is less than 0.5 bar, please recharge the water immediately;
(2) When recharging, the hydraulics system pressure should be not more than 2.5 Bar.

5.2 Troubleshooting

Malfunctions
Compressor does not
start up
Heavy noise of fan
Heavy noise of
compressor
Water pump does not
run or runs abnormally
Compressor starts or
stops frequently
The unit does not heat
although compressor
is running
Reasons
1.Power supply has problem.
2.Connection wire is loose.
3.Malfunction of mainboard.
4.Malfunction of compressor.
1.Fixing bolt of fan is loose.
2.Fan blade touches shell or grill.
3.Operation of fan is unreliable.
1.Liquid slugging happens when liquid refrigerant
enters into compressor.
2.Internal parts in compressor are broken.
1.Malfunction of power supply or terminal.
2.Malfunction of relay.
3.There is air in water pipe.
1.Poor or excess refrigerant.
2.Poor circulation of water system.
3.Low load.
1.Leakage of refrigerant.
2.Malfunction of compressor.
NOTE
1.Phase sequence is reverse.
2.Check out and re-fix.
3.Find out the reasons and repair.
4.Replace compressor.
1.Re-fix fixing bolt of fan.
2.Find out the reasons and adjust.
3.Replace fan.
1.Check if expansion valve is failure and
temp. sensor is loose. If that, repair it.
2.Replace compressor.
1.Find out the reasons and repair.
2.Replace relay.
3.Evacuate.
1.Discharge or add part of refrigerant.
2.Water system is blocked or there is air in
it. Check water pump, valve and pipeline.
Clean water filter or evacuate.
3.Adjust the load or add accumulating
devices.
1.Repair by leakage detection and add
refrigerant.
2.Replace compressor.
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Troubleshooting