1、Maintenance
Check the water supply and air vent frequently, to avoid lack of water or air in the water loop.
Clean the water filter in a certain period to keep good water quality. Lack of water and dirty
water can damage the unit. The heat pump will start the water pump per 72 hours when it is
not running, to avoid freezing.
Keep the unit in a place which is dry and clean, and has good ventilation. Clean the heat
exchanger in 1 or 2 month and keep good heat exchange rate and save energy.
Check each part of the unit and the pressure of the system. Replace the failure part if there
is any, and recharge the refrigerant if it is needed.
If the heat pump is not used for a long time, please drain out all the water in the unit and
seal the unit to keep it good. Please drain the water from the lowest point of the heat
exchanger to avoid freezing in winter. Water recharge and full inspection on the heat
pump is needed before it is restarted.
Check the power supply and the electrical system, make sure the electrical components are
good, the wiring is well. If there is any part failed with wrong action or smell, please replace
in time.
The water loop of the heat pump MUST be protected from freezing in winter time.Please
pay attention to below suggestions.Nonobservance on below suggestion will invalid the
warranty for the heat pump.
(1) Please do not shut off the power supply to the heat pump in winter. When the air
temperature is below 0 ℃, if the inlet water temperature is above 2 ℃ and below 4℃,
the water pump will start for freezing protect, if the inlet water is lower than 2 ℃, the
heat pump will run for heating.
(2) Use anti-freezing liquid (glycol water)
1) look for below table for the volume of the glycol water
2) the glycol water can be added into the system from the expansion tank of the water loop.
Note: if the glycol water is too much, the water flow and water pump will be influenced
and the heat exchange rate will be decreased. This table is for reference, please
use anti-freezing water according to the real condition of the local climate.
Please drain out the water in the super heater of the heat pump unit in winter, when the
super heater is not used.
50
-33
0.946
0.966
1.178
1.308
40
-22
0.961
0.976
1.121
1.263
30
-14
0.972
0.986
1.074
1.181
20
-8
0.982
0.992
1.040
1.129
10
-3
0.991
0.996
1.013
1.070
Glycol percentage （%）
ambient temp. (℃)
cooling/heating capacity fluctuation
power input fluctuation
water flow fluctuation
water drop fluctuation
Maintenance
1) According to failure code of the controller,we can judge
and solute the failure.
2.Ordinary malfunctions and solution
Maintenance
malfunction
display
Water inlet temp.
Sensor failure
Evaporator sensor
failure
Anti freezing
under cooling mode
E1
E2
E3
tC1
Reason
The sensor is open
or short circuit
Check or change the sensor
resolution
Water flow rate
is not enough
Ambient temp. too low
Water outlet temp.
Sensor failure
The sensor is open
or short circuit
Check or change the sensor
The sensor is open
or short circuit
Check or change the sensor
Check the water flow volume,or
water system is jammed or not
The antifreezing
protection in winter
High pressure
protect
Check through each pressure
switch and return circuit
High pressure
switch action
Normal working
Flow switch failure
No water/little water
in water system.
Check the water flow volume,
water pump is failure or not
Low pressure
protect
Low pressure
switch action
Check through each pressure
switch and return circuit
Exhaust
temperature protect
HP1
LP1
FL
A1
A1
Exhaust temperature
is too high
Check through each temp.
switch and return circuit
18 19
To Next Page
Loading...