TROUBLESHOOTING
The following symptoms do not indicate malfunction.
The following symptoms do not indicate malfunction.
SYMPTOM
SYMPTOM
Flowing sound during operation.
Operation is delayed a few minutes after restarting.
Mono bloc unit emits water/steam.
Mono bloc unit emits steam during heating mode.
Mono bloc unit does not operate.
(Mono bloc) Air-to-water Heatpump system operation will
turn off.
System diffi cult to heat-up.
System cannot get warm instantly.
Backup heater turn ON automatically when it is not
enabled.
Operation starts automatically even without ON Timer.
Check the following before calling for servicing.
Check the following before calling for servicing.
SYMPTOM
SYMPTOM
Heating operation is not working effi ciently.
Noisy during operation.
The unit does not work.
Operation LED is no lit or remote control display is blank.
The operation LED blinks and error code appear on remote control display.
The operation LED blinks and error code appear on remote control display.
TIMER
TIMER
• Turn the unit off and reveal the error code to authorized dealer.
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2 3 4 5 6
MONTUEWEDTHU FRI SAT SUN
• Timer operation cancel when error code occur.
ON
OFF
Force Heater Mode Button
Force Heater Mode Button
• In case of a failure of the (Mono bloc) Air-to-Water Heatpump system, the backup heater can be
used to heat up the heating water. Press
FORCE
• Press
• During Force Heater mode, all other operations are not allowed.
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► • Refrigerant fl ow inside the unit.
► • The delay is a protection to the unit's compressor.
► • Condensation or evaporation occurs on pipes.
► • This is due to defrost operation happens at the heat
► • When the outdoor temperature is out of the operation
► • The heatpump system enter protection control. Compressor
► • When heating is operated together with fl oor heating or
► • Due to the nature of the heatpump system, it may take
► • The turn ON of backup heater is a protection to the
► • The sterilization timer has been set.
► • Set the temperature correctly.
► • Check if the unit has been installed at an incline or the
► • Check if the circuit breaker is tripped.
► • Is the power supply off or power failure.
OFF / ON
to stop the force heater operation.
CAUSE
CAUSE
exchanger.
condition range, the heatpump system enter protection
control.
stops by water inlet temperature lower than 18°C; and
backup heater power turn on by water inlet temperature
lower than 23°C.
panel heater simultaneously, there may be case where
warm water temperature is getting lower and cause fl oor
heating or panel heater heat-up is weaken.
• When outdoor air temperature is low, it may be diffi cult to
get warm.
• Is the snow pile blocking the discharge outlet or intake
inlet of mono bloc unit.
• When water outlet set temperature is low, it may be
diffi cult to get warm.
some time to heat-up the water if the unit is operated
from cold-start.
indoor unit's heat exchanger.
CHECK
CHECK
• Is the panel heater valve closed.
• Clear any obstruction at the air inlet and air outlet vents
of mono bloc unit.
cover is not closed properly.
FORCE
to switch on the backup heater.
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