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24.
Daily Operation and
Maintenance
In order to avoid damage of the unit, all protecting devices in the unit had been set before delivery, so please do
not 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 8 hours.
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 the unit and to avoid stop
of the unit for protection.
In order to avoid protection or damage of the unit caused by blockage of the 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 not used for a long period should
be drained. In addition, open the end cap of the water tank for drainage.
When the water tank has been installed but the water tank is set to “Without”, functions relative with the water
tank will not work and the displayed water tank temperature will always be “-30”. In this case, the water tank
would suffer frostbite and even other severe influences under low temperature. Therefore, once the water tank
has been installed, the water tank must be set to ‘’With”, otherwise GASSERO will not be responsible for this
abnormal operation.
Never frequently make the unit on/off and close the manual valve of the water system during operation of the
unit by users.
Ensure frequent check to 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.
Notes
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.
24.1.
Troubleshooting
Malfunctions
Reasons
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.
Heavy noise of fan
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.
