Panasonic WHMHF12D6E5 - Manual (Page 9)

ENGLISH
9
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.
Mono bloc unit emits water/steam. ► • Condensation or evaporation occurs on pipes.
Mono bloc unit emits steam during heating mode. ► • This is due to defrost operation happens at the heat
exchanger.
Mono bloc unit does not operate. ► • When the outdoor temperature is out of the operation
condition range, the heatpump system enter protection
control.
(Mono bloc) 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 diffi cult to heat-up. ► • When heating is operated 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 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.
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 operation is not working effi ciently. ► • Set the temperature correctly.
• Is the panel heater valve closed.
• Clear any obstruction at the air inlet and air outlet vents
of mono bloc 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 remote control display is blank. ► • Is the power supply off or power failure.
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
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 (Mono bloc) 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.
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