Legionella Protection Function Failed Alarm

If one of the DHW sensors (the upper and lower sensors) does not reach the anti-legionella setpoint within the appropriate time, an alarm is generated at the output "DHWS_Leg_Alm" and the anti-legionella function will be stopped. This alarm can be reset via the internal reset point or by restarting the anti-legionella function.

In case of anti-legionella alarm (DHWS_Leg_Alm = 1) the operation mode will display the value "6" until no higher priority (> 6) operation mode occurs.

Table 13.   Parameter List

Description

Range

Default

Units

UWT-01: P-band buffer temperature control

1...20

5

K

LEG-01: anti-legionella setpoint

0...90

70

°C

LEG-02:  time to reach legionella setpoint; 0 =disable

0...3600

1800

sec

LEG-03: legionella duration

0...3600

600

sec