Gree GRS-CQ8.0Pd/NaE-K Manuel D'utilisateur page 60

Air-to-water Heat Pump Split Versati
The water pressure gage is installed in the returning water line in the 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.
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
Poor efficiency of hot
water heating
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Troubleshooting
Reasons
Power supply has problem.
①
Connection wire is loose.
②
Malfunction of mainboard.
③
Malfunction of compressor.
④
Fixing bolt of fan is loose.
①
Fan blade touches shell or grill.
②
Operation of fan is unreliable.
③
L i q u i d s l u g g i n g h a p p e n s w h e n l i q u i d
①
refrigerant enters into compressor.
Internal parts in compressor are broken.
②
Malfunction of power supply or terminal.
①
Malfunction of relay.
②
There is air in water pipe.
③
Poor or excess refrigerant.
①
Poor circulation of water system.
②
Low load.
③
Leakage of refrigerant.
①
Malfunction of compressor.
②
Poor heat insulation of water system.
①
Poor heat exchange of evaporator.
②
Poor refrigerant of unit.
③
Blockage of heat exchanger at water side.
④
Phase sequence is reverse.
①
Check out and re-fix.
②
Find out the reasons and repair.
③
Replace compressor.
④
Re-fix fixing bolt of fan.
①
Find out the reasons and adjust.
②
Replace fan.
③
Check if expansion valve is failure and
①
temp. sensor is loose. If that, repair it.
Replace compressor.
②
Find out the reasons and repair.
①
Replace relay.
②
Evacuate.
③
Discharge or add part of refrigerant.
①
Water system is blocked or there is
②
air in it. Check water pump, valve and
pipeline. Clean water filter or evacuate.
Adjust the load or add
③
accumulating devices.
Repair by leakage detection and add
①
refrigerant.
Replace compressor.
②
Enhance heat insulation efficiency of
①
the system.
Check if air in or out of unit is normal
②
and clean evaporator of the unit.
Check if refrigerant of unit leaks.
③
Clean or replace heat exchanger.
④
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SPLIT TYPE
Troubleshooting