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Troubleshooting
The following symptoms do not indicate malfunction.
Symptom
Water flowing sound during operation.
Operation is delayed a few minutes
after restarting.
Outdoor unit emits water/steam.
Steam comes out of the outdoor unit in
the heating mode.
Outdoor unit does not operate.
System operation switches off.
System is hard to heat up.
System does not heat up instantly.
Backup heater is automatically turned
ON when it is disabled.
Operation starts automatically when the
timer is not set.
Display power consumption remains
as previous value.
HEAT indicator blinks on the display.
Loud refrigerant noise continue for a
few minutes.
*
Cool mode is unavailable.
1
Check the following before calling for servicing.
Symptom
Operation in HEAT/ *
COOL mode is
1
not working efficiently.
Noisy during operation.
System does not work.
Operation LED is not lit or nothing is
displayed on the control panel.
Force Heater Mode Button
• If a malfunction occurs in the system, the backup heater may be used to heat up the water.
Press
to switch on the backup heater.
• Press
• In the Force Heater mode, no other operation can be used.
*
The system is locked to operate without COOL mode. It can be unlocked only by authorized installers or our authorized service partners.
1
*
Only displayed when COOL mode is unlocked (Means when COOL mode is available).
2
Cause
• Refrigerant flow inside the unit.
• The delay is a protection for the compressor.
• Condensation or evaporation occurring in the pipes.
• It is caused by defrost operation in the heat exchanger.
• It is caused by the protection control of the system when outdoor temperature is
out of the operating range.
• It is caused by the protection control of the system. When the water inlet
temperature is lower than 10 °C, the compressor stops and the backup heater
power turns on.
• When the panel and the floor are heated simultaneously, warm water temperature
may decrease, which may reduce the heating ability of the system.
• When the outdoor air temperature is low, the system may need longer time to heat
up.
• Discharge outlet or intake inlet in the outdoor unit is blocked by some obstacle,
such as a pile of snow.
• When the preset water outlet temperature is low, the system may need longer time
to heat up.
• System will take some time to heat up the water if it starts to operate at cold water
temperature.
• It is caused by the protection control of the indoor unit heat exchanger.
• Sterilisation timer has been set.
• Memory is saved on hourly basis. If a power failure occurs, the data kept from last
hour will be displayed.
• Total power consumption has reached 999 days. press
• System is performing deice operation.
• It is caused by protection control during deice operation at outdoor ambient
temperature lower than -10°C.
• System has locked to operate in HEAT mode only.
Check
• Set the temperature correctly.
• Close the panel heater/cooler valve.
• Clear any obstruction in the air inlet and air outlet vents of the outdoor unit.
• Outdoor unit or indoor unit has been installed at an incline.
• Close the cover properly.
• Circuit breaker has tripped/activated.
• Check that the power supply is working correctly, or that a power failure has not
occurred.
to switch off the backup heater.
to reset the counter.
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