Installation & Owner's Manual
17
Anode Rod
P2
High discharge temperature protection
TP>110°C, Protection active
TP<90°C, Protection inactive
Maybe because of 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.
P3
Compressor abnormally stopped protection The
discharge temperature is not so higher than evaporator
temperature after compressor running a term.
Maybe because of compressor broken or bad connection
between PCB and compressor.
Contact a qualified person to service the unit.
P4
Compressor overloaded protection (10 secs after
compressor startup, current checking starts , 1)only
compressor running, if it is >10A , the compressor will
be stopped and protected.)
2)ComE-heater running, if it is >IEH+10,the
compressor will be stopped and protected.)
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.
LA
When the ambient temp T4 is out of Heat Pump running
range (-7°C~43°C) Heat Pump will stop, unit will show
LA on the position of clock on display until T4 back to
(-7°C~43°C).
Only valid for the unit without E-heater.
Unit with E-heater will never show "LA".
It is normal, and no necessary to repair.
NOTE
● The diagnostic codes listed above are the most common.
If a diagnostic code not listed above is displayed, contact
residential technical assistance referenceing the number on
the front of this manual.
● If any of P1/P2/P3/P4 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 active 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.
7. MAINTENANCE
7.1 Maintenance
1) Check the connection between power supply plug and socket
and ground wiring regularly;
2) In some cold area (below 0°C), 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.
3) It is recommended to clean the inner tank and E-heater every
half year to keep an efficient performance.
4) Check the anode rod every half year and change it, if it has
been used out. For more details, please contact the supplier or
the after-sale service.
5) 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.
6) 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 duct), 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.
7) 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.
8) How to change the anode rod
● Turn off the power, and turn off the water inlet valve.
● Open hot water tap, and decrease the pressure of the inner
container.
● Open the drainage valve, and drain out the water, until there are
no water flow out.
● Get off the anode rod.
● Replace with a new one, and make sure effective sealed.
● Open cold water inlet tap untill water flows out from outlet tap,
then turn of water outlet tap.
● Power on then restart the unit.
Fig.7-1
7.2 Recommended regular maintenance table
Table.7-1
Checking Item Checking content
Checking
frequency
Action
1
air filter (inlet/
outlet)
every month
Clean the filter
2
anode rod
every half year
Replace it if it
has been used
out
3
inner tank
every half year
Clean the tank
4
E-heater
every half year
Clean E-heater
5
PTR valve
every year
Operate the
hander of PTR
valve to ensure
that waterways
are clear.
If water doesn't flow freely when operating the
hander, replace PTR valve with a new one.
Summary of Contents for COMPAK KHP 15/190 ACS1
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