13
The following symptoms do not indicate malfunction.
Symptom
Cause
Water flowing sound during operation. • Refrigerant flow inside the unit.
Operation is delayed a few minutes
after restarting.
• The delay is a protection for the compressor.
Mono bloc unit emits water/steam.
• Condensation or evaporation occurring in the pipes.
Steam comes out of the mono bloc
unit in the heating mode.
• It is caused by defrost operation in the heat exchanger.
Mono bloc unit does not operate.
• It is caused by the protection control of the system when outdoor temperature is
out of the operating range.
System operation switches off.
• 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.
System is hard to heat up.
• 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 mono bloc 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 does not heat up instantly.
• System will take some time to heat up the water if it starts to operate at cold water
temperature.
Backup heater is automatically turned
ON when it is disabled.
• It is caused by the protection control of the unit heat exchanger.
Operation starts automatically when the
timer is not set.
• Sterilisation timer has been set.
Display power consumption remains
as previous value.
• 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
to reset the counter.
HEAT indicator blinks on the display.
• System is performing deice operation.
Loud refrigerant noise continue for a
few minutes.
• It is caused by protection control during deice operation at outdoor ambient
temperature lower than -10°C.
*
1
COOL mode is unavailable.
• System has locked to operate in HEAT mode only.
Check the following before calling for servicing.
Symptom
Check
Operation in HEAT/ *
1
COOL mode is
not working efficiently.
• Set the temperature correctly.
• Close the panel heater/cooler valve.
• Clear any obstruction in the air inlet and air outlet vents of the mono bloc unit.
Noisy during operation.
• Mono bloc unit has been installed at an incline.
• Close the cover properly.
System does not work.
• Circuit breaker has tripped/activated.
Operation LED is not lit or nothing is
displayed on the remote control.
• Check that the power supply is working correctly, or that a power failure has not
occurred.
Troubleshooting
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
to switch off the backup heater.
• In the Force Heater mode, no other operation can be used.
*
1
The system is locked to operate without COOL mode. It can be unlocked only by authorised installers or our authorised service partners.
*
2
Only displayed when COOL mode is unlocked (Means when COOL mode is available).
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How to use / Maintenance /
Troubleshooting
