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5
Service and Maintenance
Troubleshooting
Fault symptom
Cold water at taps
set temperature.
down to the set temperature. (ONLY
After DHW operation room tempera-
ture rises a little.
Heating emitter is hot in the DHW
mode. (The room temperature rises.)
-
tem from operating but the outdoor
unit operates.
Pump runs without reason for short
time.
indoor unit
Water discharges from one of the
relief valves
Small amounts of water drip from
one of the relief valves.
An error code appears in the main The indoor or outdoor unit is reporting an abnormal
Heat pump is forced to turn ON and
OFF.
<Power failure>
All setting will be saved for 1 week with no power, after 1 week Date/Time ONLY will be saved.
6
Serial number
The serial number is indicated on the SPEC NAME PLATE.
Sequential number for each unit: 00001–99999
Year of manufacture (western calendar) : 2020
Possible cause
Scheduled control off period
All hot water from DHW tank used
Heat pump or electric heaters not working
The room in which the temperature sensor is located is
at a different temperature to the rest of the house.
the outdoor unit.
low, Cooling mode does not start running to avoid freez-
ing of the water pipes.
components from overheating. The amount of hot water
directed into the space heating circuit is dependent on
Freeze stat. function is active.
Pump jam prevention mechanism to inhibit the build up
of scale.
Heaters switching on/off
heating mode.
Loose pipework
condition
switch-on and off commands are input.
0, 2021
1
Solution
Ensure DHW mode is operating and wait for DHW tank to re-heat.
Contact installer.
Check settings and change as appropriate.
Contact installer.
Contact installer.
Open the valves.
settings.
Contact installer.
Contact installer.
tact installer.
Twist the valve cap in the direction indicted until a click is heard. This
careful the water released will be hot. Should the valve continue to drip
en
-
10
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