Flowing sound during operation.
Refrigerant flow inside the unit.
Operation is delayed a few minutes after restarting.
The delay is a protection to the unit’s compressor.
Outdoor unit emits water/mist.
Condensation or evaporation occurs on pipes
Outdoor unit emits mist during heating mode.
This is due to defrost operation happens at the heat exchanger.
Outdoor unit does not operate.
When the outdoor temperature is out of the operation condition range, the heatpump system enter
protection control.
(Outdoor unit) Air-to-water Heatpump system operation
will turn off.
The heatpump system enter protection control. Compressor stops by water inlet temperature lower than
18°C; and backup heater power turn on by water inlet temperature lower than 23°C.
System difficult to heat-up.
Multiple heating circuits can effect the performance at times. Is the snow pile blocking the discharge
outlet or intake inlet of outdoor unit.
System cannot get warm instantly.
Due to the nature of the heatpump system, it may take some time to heat-up the water if the unit is
operated from cold-start.
Backup heater turn ON automatically when it is not enabled.
The turn ON of backup heater is a protection to the indoor unit’s heat exchanger.
Operation starts automatically even without ON Timer.
The sterilisation timer has been set.
5. Troubleshooting
The following symptoms do not indicate malfunction.
SYMPTOM
SYMPTOM
CAUSE
CAUSE
Check the following before calling for servicing .
Indicator that the domestic hot water in the cylinder is above +60 ºC
(only if controlled by A2W heat pump)
The operation LED blinks and error code appear on remote control display.
· Turn the unit off and reveal the error code to authorised dealer.
· Timer operation cancel when error code occur.
Force Heater Mode Button
· In case of a failure of the heat pump system but still power to the unit, the electric heaters can be activated to
provide HEAT, HEAT+TANK or just TANK, check the mode of operation showing (check what is displayed on 6 & 8 on
control panel)
· If a showing against 6 or 8, then when the FORCE button is pressed this will be activated, if it is not showing then
press then the MODE button until the required setting is displayed, once the FORCE button is pressed to activate the
operation the will disappear against HEATER BOOSTER (display 12) and the operation is set.
· Using FORCE heater mode, all operations are not allowed (this is an emergency operation and will incur higher
running costs)
· Press (insert picture of on/off button) to stop the Force heater operation.
TIMER
TIMER
1
MON TUE WED THU FRI SAT SUN
2 3 4 5 6
ON
OFF
FORCE
Heating operation is not working efficiently.
Check the temperature set on house/room thermostat
Is the radiator valve (TRV closed)
Clear any obstructions of the air inlet or outlet vents of the outdoor unit
Noisy during operation.
Check if the outdoor unit has been installed at an incline or a cover is not closed properly.
The outdoor unit does not work
Check if the circuit breaker on house electrical distribution board has not tripped.
Operation LED is no lit or remote control display is blank.
Is the power supply off or power failure.
USER GUIDE
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