Outline Of Control (Indoor Unit); Freeze Prevention - Daikin ALTHERMA HT ERSQ 011 AA Service Manual

Outline of Control (Indoor Unit)

6. Outline of Control (Indoor Unit)

6.1 Freeze Prevention

Freeze-up
The freeze-up prevention is only active when the unit is in thermo OFF condition.
Prevention by
[Start condition]
Thermo Off
AND/OR*:
Condition
 Outdoor ambient temperature < 4°C
 Leaving or return water temperature < 7°C
* AND/OR depending of setting [8 - 04] for further details see chapter of setting.
[Operation]
Pump will operate and if leaving OR return water < 5°C for 5 minutes, the unit will start up the freeze-up
prevention function to prevent too low temperatures.
70
ESIE09-08A
Function