8.Maintenance and repair
8.Maintenance and repair
28
29
1. Maintenance.
It should keep dry, clean and well-ventilated around the units to maintain its good effect
of heat transfer and energy saving.
Check the parts of the unit and the pressure of the system regularly (once 1 year). If
there is any unusual phenomena, repair and replace it immediately.
Check if the electrical wiring is not firm enough and the electrical element has any
unusual action and smell. If so, repair and replace it immediately.
Do not make the unit power off if the unit is not used for a long time. We will not be
responsible for any lost caused by the frost crack of parts due to the long time power off.
Check if the power socket and plug have a good contacting, perfect earthing and
thermal protections.
In the cold area (below 0 °C), if you do not use the unit for a long time, please drain the water
in the tank to avoid the damage due to freeze.
It is recommended that the set temperature can be set lower when there is enough hot
water for daily life to saves energy and extend the service life of water heater.
Specification of the fuse in the controller is 5AL250V; meaning: 250V, 5A.
2. PCB I/O port
Filter must be cleaned once a half year. Remove
the filter following the picture below and clean it
with tap water.
Loosen the two screws in the top of the water
heater(indicated in the picture blow) to remove the
front panel and wire controller.
Squeeze and pull out the filter.
Filter
Loosen the 2 screws here
to remove the front panel
and wire controller.
WARNING
The heat pump must be installed by qualified personnel to avoid
improper installation which will lead to water leakage, electrical
shock or fire.
CN3
GND
AI06
GND
AI05
GND
AI04
GND
AI03
GND
AI02
GND
AI01
CN2
AC-N
CN1
OUT5
HW200
OUT3
OUT4
CN4
CN19
CN6
OUT2
OUT1
4
3
4
3
1
2
V
N
E
T
G
N
D
D
I0
1
G
N
D
D
I0
2
G
N
D
D
I0
3
G
N
D
D
I0
4
G
N
D
D
I0
5
G
N
D
D
I0
6
G
N
D
NO.
Symbol
The definition of the ports
1
OUT1
Compressor(output)(220-230VAC)
2
OUT2
Heater (output)
（
220-230VAC
）
3
OUT3
Four way valve (output)(220-230VAC)
4
OUT4
High speed fan/Source pump (output)
（
220-230VAC
）
5
OUT5
Low speed fan /Circulate pump/Solar pump/
Recovery pump/Cooling(output)(220-230VAC)
6
AC-N
Ground
7
NET GND 12V
Remote controller
8
DI01 GND
Remote ON/OFF
9
DI02 GND
Over heat protection
10
DI03 GND
Low pressure protection
11
DI04 GND
High pressure protection
12
DI05 GND
(SPARE)
13
DI06 DND
Flow swtich protection
14
AI01 GND
Ambient temp. sensor(input)
15
AI02 GND
Tank of bottom temp.Sensor(input)
16
AI03 GND
Tank of top temp. Sensor(input)
17
AI04 GND
Coil temp. Sensor/Anti-freeze Sensor(input)
18
AI05 GND
Suction temp. sensor(input )
19
AI06 GND
Solar temp.sensor(input)
20
CN6
Running indication/Circulate pump/Solar pump
