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