Care And Maintenance - LG THERMAV AHNW16606B0 Instruction Manual

Check Points, Maintenance and Troubleshooting

Care and Maintenance

The device must be visually inspected once a year. The electrical and hardware installation of the
device have to be inspected. In the case of detected irregularities, contact the authorized technician.
The servicing and maintenance of the device can only be performed by a person authorized by the
manufacturer. In case of a malfunction, first contact the installer who installed the device.
Cleaning the water filter
Cleaning of water filters on the return into the device is advised to be performed at least once
yearly.
A blocked water filter and magnetic filter can lead to disturbances in operation of the device or in-
correct functioning of the device. In case the display displays a warning of flow malfunction ("Cau-
tion, flow!").
Monitoring the pressure in the heating system
• Periodically, once yearly, check the water pressure in the heating system.
• In case the pressure falls (i.e. Leakage of the system) and as a result there is not enough water
flow the display displays a warning of flow malfunction ("Caution, flow!").
Cleaning of the heat exchangers
Cleaning of the heating system (water section)
Residue of grease and sealants in pipes can pollute the condenser of the device up to a point where
cleaning is necessary. In this case the authorized person should perform the cleaning with a solution
(up to 5 % of phosphorous acid) which should be heated to room temperature. The condenser has to
be completely disconnected from the heating system and rinsed with diluted phosphorous acid in the
opposite direction of normal flow.
After cleaning, the condenser has to be rinsed thoroughly with an agent neutralizing the acid deter-
gent so as to prevent the contamination of the heating system.
Acid detergents should be used carefully, instructions of the manufacturer and environmental regu-
lations must be followed. The cleaning can only be performed by a qualified person.
If any doubts about using the detergents arise, consult with the manufacturer of the detergent.
60 Air-to-Water Heat Pump