Bedienungsanleitung Panasonic WH-UD09HE8 (Seite 25 von 108) (Englisch, Holländisch, Italienisch, Spanisch)

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Cleaning instructions / Troubleshooting

The following symptoms do not indicate malfunction.

Symptom Cause

Water ﬂ owing sound during operation. • Refrigerant ﬂ ow inside the unit.

Operation is delayed a few minutes

after restarting.

• The delay is a protection for the compressor.

Outdoor unit emits water/steam. • Condensation or evaporation occurring in the pipes.

Steam comes out of the outdoor unit in

the heating mode.

• It is caused by defrost operation in the heat exchanger.

Outdoor 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 ﬂ oor 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 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 indoor unit heat exchanger.

Operation starts automatically when

the timer is not set.

• Sterilization timer has been set.

Loud refrigerant noise continues for

several minutes.

• It is caused by protection control during deice operation at outdoor ambient

temperature lower than -10 °C.

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/*

COOL mode is

not working efﬁ ciently.

• 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.

Noisy during operation. • Outdoor unit or indoor 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 Controller.

• Power supply is working correctly, or a power failure has occurred.

Troubleshooting

The system is locked to operate without COOL mode. It can be unlocked only by authorised installers or our authorised service partners.

Only displayed when COOL mode is unlocked (This means when COOL mode is available).

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