10
TROUBLESHOOTING
The following symptoms do not indicate malfunction.
The following symptoms do not indicate malfunction.
SYMPTOM
SYMPTOM
CAUSE
CAUSE
Flowing sound during operation.
►
• Refrigerant
fl
ow 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/steam.
►
• Condensation or evaporation occurs on pipes.
Outdoor unit emits steam 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.
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 dif
fi
cult to heat-up.
►
• When heating is operated by indoor unit together with
fl
oor heating or 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 dif
fi
cult to
get warm.
• Is the snow pile blocking the discharge outlet or intake
inlet of outdoor unit.
• When water outlet set temperature is low, it may be
dif
fi
cult to get warm.
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 sterilization timer has been set.
Check the following before calling for servicing.
Check the following before calling for servicing.
SYMPTOM
SYMPTOM
CHECK
CHECK
Heating/cooling operation is not working ef
fi
ciently.
►
• Set the temperature correctly.
• Is the panel heater/cooler valve closed.
• Clear any obstruction at the air inlet and air outlet vents
of outdoor unit.
Noisy during operation.
►
• Check if the unit has been installed at an incline or the
cover is not closed properly.
The unit does not work.
►
• Check if the circuit breaker is tripped.
Operation LED is no lit or control panel display is blank.
►
• Is the power supply off or power failure.
The operation LED blinks and error code appear on control panel display.
The operation LED blinks and error code appear on control panel display.
TIMER
TIMER
1
MONTUEWEDTHU FRI SAT SUN
2 3 4 5 6
ON
OFF
• Turn the unit off and reveal the error code to authorized dealer.
• Timer operation cancel when error code occur.
Force Heater Mode Button
Force Heater Mode Button
FORCE
• In case of a failure of the Air-to-Water Heatpump system, the backup heater can be used to heat
up the heating water. Press
FORCE
to switch on the backup heater.
• Press
OFF / ON
to stop the force heater operation.
• During Force Heater mode, all other operations are not allowed.
