Air-to-water Heat Pump Split Versati
56
SPLIT TYPE
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.
Troubleshooting
Malfunctions
Reasons
Troubleshooting
Compressor does not
start up
①
Power supply has problem.
②
Connection wire is loose.
③
Malfunction of mainboard.
④
Malfunction of compressor.
①
Phase sequence is reverse.
②
Check out and re-fix.
③
Find out the reasons and repair.
④
Replace compressor.
Heavy noise of fan
①
Fixing bolt of fan is loose.
②
Fan blade touches shell or grill.
③
Operation of fan is unreliable.
①
Re-fix fixing bolt of fan.
②
Find out the reasons and adjust.
③
Replace fan.
Heavy noise of
compressor
①
Liquid slugging happens when liquid
refrigerant enters into compressor.
②
Internal parts in compressor are broken.
①
Check if expansion valve is failure and
temp. sensor is loose. If that, repair it.
②
Replace compressor.
Water pump does not
run or runs abnormally
①
Malfunction of power supply or terminal.
②
Malfunction of relay.
③
There is air in water pipe.
①
Find out the reasons and repair.
②
Replace relay.
③
Evacuate.
Compressor starts or
stops frequently
①
Poor or excess refrigerant.
②
Poor circulation of water system.
③
Low load.
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.
The unit does not heat
although compressor
is running
①
Leakage of refrigerant.
②
Malfunction of compressor.
①
Repair by leakage detection and add
refrigerant.
②
Replace compressor.
Poor efficiency of hot
water heating
①
Poor heat insulation of water system.
②
Poor heat exchange of evaporator.
③
Poor refrigerant of unit.
④
Blockage of heat exchanger at water side.
①
Enhance heat insulation efficiency of
the system.
②
Check if air in or out of unit is normal
and clean evaporator of the unit.
③
Check if refrigerant of unit leaks.
④
Clean or replace heat exchanger.