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Installation & Owner’s Manual
16
7. MAINTENANCE
1)
2)
3)
4)
5)
6)
7)
Check the connection between power supply plug and socket
and ground wiring regularly;
In some cold area (below 0), if the system will be stopped for
a long time, all the water should be released in case of freezing
of inner tank and damage of E-heater.
It is recommended to clean the inner tank and E-heater every
half year to keep an efficient performance.
Check the anode every half year and change if required. For
more details, please contact the supplier or the 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 sufficient.
Clean the air filter every month in case of any inefficiency on the
heating performance.
In terms of the filter set in air inlet directly (namely, air inlet
without connect with canvas), the method of dismantle the filter
is: anti-clockwise unscrew the air inlet ring, take out the filter
and clean it completely, finally, remount it to the unit.
Before shutting the system off for a long time, please:
Shut off the power supply;
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 off the power, and turn off the water inlet valve.
Open hot water tap, and decrease the pressure of the inner
container.
7.1 Maintenance
8)
P2
High discharge temperature protection
Tp>110℃,Protection active
Tp<90℃,Protection inactive
P3
P4
LA
It is normal, and no necessary to repair.
7.2 Recommended regular maintenance table
Open the drain port, and release the water, until there are no water
flow out.
Unscrew anode according to instruction.
Replace with a new one, and make sure effective sealed.
Open cold water valve untill water flows out from outlet tap,
then turn of water outlet tap.
Power on then restart the unit.
Checkin
g
Item
Checkin
g
conten
t
Checking frequency Action
1
air filte
r
(inlet/outle
t
)
every month Clean the filte
r
2 anode every half year
Replace it if it h
a
s
been used ou
3 inner tank every half year Clean the tan
k
4
5
E-heater every half year Clean E-heater
Operate the
hander of PTR
valve to ensure
that waterways
are clear.
PTR valve
If water doesn't flow freely when operating the
hander, replace PTR valve with a new one
every year
Table.7-1
Fig.7-1
anode
For the bad mining area environment and poor water quality, it
must periodic do the following works base on the actual
situations: check the magnesium bar to see whether it has been
consumed; clean the sundries in the filter screen to prevent
blocking the air inlet; clean the filter screen.
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 protected.)
When the ambient temp T4 is out of Heat Pump running
range (-743) Heat Pump will stop, unit will show LA on
the position of clock on display until T4 back to (-743).
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, ect. Contact a qualified person to service the unit.
Compressor broken or bad connection between PCB and
compressor.Contact a qualified 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, ect. Contact a qualified person to service the unit.
The diagnostic codes listed above are the most common. 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 qualified person to service the unit.
NOTE
19


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