Air-to-water Heat Pump
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21 Daily Operation and Maintenance
In order to avoid damage of unit, all protecting devices in the unit had been set before outgoing, 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 protection or 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 temp. is below zero in
winter.
In order to avoid frost crack of the unit, water in the unit and pipeline system not used for a long
period should be drained. 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 malfunction of the unit is out of control of users, please timely contact with authorized service
center of company.
Note:
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 2.5Bar.
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.
High 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.
High 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.
