Panasonic PAW-DHWM300ZC, Installation Instructions Manual

Page: 11 / 172

11
EN
Switching on the Heat Pump
Press key no. 1 and keep it pressed for some 2 seconds. The display shows the
current water temperature in the hot water tank, the signal lamp 3 switches on.
Temperature Setting
Pres and release key 6 or 7. When the key is pressed, the display shows the marking
°C. Now you can set the required temperature. With key 7 the temperature is reduced
and with key 6 the temperature is increased. When the setting is completed, the
marking on the display starts flashing. After eight flashes the new temperature is set,
and the display shows the temperature of the water in the hot water tank.
In versions with installed thermometer, the thermometer will show ambient
temperature, while the display on the heat pump will show the temperature of water in
the lower part of the water heater. This is why the two temperatures will vary.
WARNING: If the heating pump is operating outside the temperature zone of
operation, the evaporator may freeze. Then, the heating pump switches off, and the
display shows the marking tLo. After switching off the heating pump will remain
inoperational until the evaporator unfreezes.
Legionella Control Programme
Your heat pump features a system for thermal disinfection for legionella prevention.
This system includes a special function for high temperature heating (up to 65 °C) of
water in the hot water tank. The system operates automatically, switching on the high
temperature heating of water every 14 days. When the temperature in the water tank
reaches 65 °C, the high temperature heating is switched off.
High temperature heating can also be activated manually, by pressing the key 2 (ca.
5 seconds). The display alternatively shows the temperature of water in the hot water
tank and marking LEG. When the temperature in the hot water tank reaches 65 °C,
the heat pump is switched to normal operation.
Indicator of errors and warnings
WARNING: Even after switching off with the switch, the elements in the electric
control unit are live!
Error Description Solution
Er1 Error - Temperature sensor 2a
(disconnected, faulty
connection, short circuit) Call your service provider.
Er2 Error - Temperature sensor 2b
(disconnected, faulty
connection, short circuit) Call your service provider.
tLo Inlet air temperature too low. When the inlet air temperature rises, the
water pump starts functioning normally.
LEG Heat pump is operating in the
anti-legionella mode. When the water temperature in the tank
reaches 65 °C, the heat pump starts
functioning normally.
Control
lamp 3 is
flashing Delayed start of the heating
pump. The heating pump starts functioning after
the time delay is finished.