1)
2)
3)
4)
5)
6)
7)
Check the connection between power supply plug and socket
and ground wiring regularly;
In cold area
(
below 0°C
), if the system will be stopped for
a long time, all the water should be
in case of freezing
of inner tank and damage
E-heater.
It is recommended to clean the inner tank and E-heater every
half year to keep an e
cient performance.
Check the anode every year and change if required. For
more details, please contact the supplier or after-sale
service.
It is recommended to set a lower temperature to decrease the
heat release, prevent scale and save energy if the outlet water
volume is su
nt.
Clean the air
lter every month in case of any ine ciency
the
heating performance.
t
Be fore shutting the system of f for a long time,
Release all the water in water tank and the pipeline and close
all the valves
Check the inner components regularly.
How to change the anode;
Turn o
the power, and turn o water inlet valve.
Open hot water tap, and decrease the pressure of the inner
.
8)
P2
High discharge temperature protection
Tp>110°C Protection active
Tp<90
Protection inactive
°C
P3
P4
LA
It is normal, and no
necessary to repair.
Open the , and release the water, until no water
ow out.
Unscrew anode
.
Replace with a new one, and make sure
Open cold water valve untill water ows out from outlet tap,
then turn of water outlet tap.
Power on
then restart the unit.
Checking
Item
Checking
content
Checking frequency Action
1
air
ter
(inlet/outlet)
every month Clean the
lter
2 anode every year
Re place it if it has
been used out
3 inner tank every year Clean the tank
4
5
E-hea ter every year Clean E-heater
Operate t he
hander of PTR
valve to ensure
that waterways
are clear.
PTR valve
If water doesn
freely when operating the
hander, replace PTR valve with a new one
every year
Table . 10.2
anode
For
Compressor abnormally stopped protection.The discharge
temperature is not so higher than evaporator temperature
after compressor running a term.
Compressor overloaded protection (10 secs after compres-
sor startup, current checking starts, 1) only compressor
running, if it is >10A , the compressor will be stopped and
protected. 2) Compressor+E-heater running, if it is
>IEH+10,the compressor will be stopped and p
rotected.)
When the ambient temp T4 is out of Heat Pump running
range (-7 〜43°C) Heat Pump will stop, unit will show LA on
the position of clock on display until T4 back to (-7 〜43°C).
Only valid for the unit without E-heater.Unit with E-heater
will never show "LA".
System blocked, air or water or less
refrigerant(leakage) in system( after repair), water temperature
sensor malfunction, e
. Contact a quali ed person to service the unit.
Compressor b roken or bad connection between PCB and
compressor.Contact a quali
ed person to service the unit.
Maybe because of compressor broken, system blocked, air or water
or more refrigerant in system(after repair),water temperature sensor
malfunction, e
. Contact a quali ed person to service the unit.
The diagnostic codes listed above are the most com mon. If a
diagnostic code not listed above is displayed, contact residen-
tial technical assistance referenceing the number on the front
of this manual.
If any of P3/P4/P2/P1 continuously appear 3 times within single
heating cycle, system will consider it as “Heat Pump system error”. The
third failure code and will be shown on the display, then heat pump
will stop running,and the unit will shift automatically to E-heater as the
backup heat source,but the third failure code and will be shown until
power is reset.Contact a quali
person to service the unit.
NOTE
10. MAINTENANCE
10.1 Maintenance
10.2 Recomended Maintenance Table
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