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Switching the anti-Legionella program on and off
Press and hold (3 seconds) the
briefly for seven (7) times to display the current anti-Legionella function status. The function status is indicated by LED1 or LED7. If
LED1 is lit, then the anti-Legionella program function is switched off (Figure 10b). If LED7 is lit, then the anti-Legionella program
function is switched on (Figure 10a). Briefly press the
pressed for 5 seconds. The electronic controls return to standby mode. Press and hold (for 3 seconds) the
appliance again.
Fig. 10a: Anti-Legionella program activated
Backup operating mode
If the inlet air temperature is lower than 7 °C or higher than 40 °C, the appliance switches to backup operating mode. The compressor
and fan do not operate, and the electric heater is switched on the heat the domestic hot water. The heat pump water heater operates
in the backup operating mode. Possibility to switch to normal operating regime is checked cyclically. When the temperature conditions
for normal heat pump operation are met, the appliance switches to normal operating regime. The heater is then switched off.
Operation in the backup regime is indicated by the
Special aspects of heat pump operation
After the heat pump is switched on, the compressor and the fan always operate for at least 5 minutes (minimum compressor
operation time).
After the heat pump is switched off, the compressor and the fan are switched off for at least 20 minutes (minimum compressor down
(off) time). If there is a request for compressor activation within this period of time, the compressor is not switched on. LED4 slowly
flashes on the display unit
automatically. Current temperature level of the water in the tank is displayed on the display unit
activation of the "TURBO" function, and switching off of the appliance are possible while the compressor is off.
Fig. 11: Compressor unit is switched off
Error indication
In case of an error, the control lamps start flashing on the display unit
function are not possible while errors are displayed or indicated; the appliance can only be switched off.
Error
Error description
Temperature sensor error
E2
(heat pump)
Temperature sensor error
E3
(electric heater)
E4
Temperature sensor error (evaporator)
Temperature sensor error
E5
(air)
Overheating
E6
(Temperature > 90 °C)
If several errors occur simultaneously, they are displayed on the display unit
occurrence of errors E4 and E5, the following is displayed repeatedly: 4x rapid flashing of control lamps, pause, 5x rapid flashing of
control lamps, pause).
If the errors E2 and E3 occur simultaneously, the heat pump and the electric heater do not operate.
If the errors E4 and E5 occur simultaneously, the appliance switches to back-up operating mode.
22
key to switch off the heat pump. The electronic controls switch to standby mode. Press the
key again to change the setting. The setting is stored when the
Fig. 10b: Anti-Legionella program deactivated
indicator that flashes until the appliance switches to normal operating regime.
(Figure 11) (5-second interval). After the down (off) time, the compressor and the fan are switched on
Indication
Repeated 2x rapid flashing of the
indicator
.
Repeated 3x rapid flashing of the
indicator
.
Repeated 4x rapid flashing of the
indicator
.
Repeated 5x rapid flashing of the
indicator
.
Repeated 6x rapid flashing of the
indicator
.
. Temperature adjustment,
. Temperature adjustment and activation of the "TURBO"
Solution
Call service
(Heat pump operates nevertheless).
Call service
(The heat pump operates, but the electric heater
does not operate.)
Call service
(Heat pump operates nevertheless).
Call service
(Heat pump operates nevertheless).
Disconnect the heat pump from the power mains;
call service.
in succession (e.g. in case of simultaneous
key
key is not
key to switch on the
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