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13.1.
MAINTENANCE
13.
MAINTENANCE AND TROUBLE SHOOTING
The heat pump water heater is an advanced equipment with high automization. The reliability and
operation life of the heat pump can be expectedly guaranteed and even increased
by regular
inspection and effective maintenance.
The external water filter should be cleaned regularly to ensure the cleanness of the water in the system
and avoid damage caused by blockage in the filter.
All protective settings in the unit have been set before ex-factory. Users must not adjust it when the heat
pump unit is in use.
Regular inspection is required for the power source and the wiring connection of the electric system.
Loose wiring connection and electric components should be repaired in time.
The water supply system, relief valve of the water tank, water level control device and air discharge
device need to be checked regularly in case of low circulation water volume caused by air entering the
system, to ensure enough capacity and reliability of the heat pump.
Check the water pump and the valves on the pipes if they work well, and make sure there is noleakage
from connectors.
Keep the surrounding of the heat pump dry,
clean and ventilated. Regularly clean the evaporator to keep high heat exchanging efficiency.
Check the inside pipe connectors and refrigerant service port is dirty with oil. Make sure there is no
refrigerant leakage.,
Before stopping the heat pump for long time, drain out all water in the pipes, and shut off the power
supply, and put it into a shield. Full inspection of the system is required before next operation.
Users should call the installer or the seller every time when there is an error on the heat pump controller.
Clean the condenser with phosphoric acid of 15% consistence under temperature of 50C-60C. Run
the circulation pump for 3 hours, and then flush with fresh water for 3 times. When installing the pipes,
add a 3 way valve on the pipes and closed on outlet of it, for cleaning use. Corrosive washing liquid is
forbidden to clean the condenser.