Nibe S1155 Installer Manual page 59

You can activate the emergency mode both when S1155
is running and when it is switched off.
When the emergency mode is active, the status lamp
turns yellow.
To activate when S1155 is running: press and hold the
on/off button (SF1) for 2 seconds and select "emergency
mode" from the shutdown menu.
To activate when S1155 is switched off: press and hold
the on/off button (SF1) for 5 seconds. (Deactivate the
emergency mode by pressing once.)
When S1155 is put in emergency mode, the display is
switched off and the most basic functions are active:
• The immersion heater works to maintain the calculated
supply temperature. If there is no outdoor sensor
(BT1), the immersion heater works to maintain the
maximum supply temperature, set in menu 1.30.6.
• The compressor and the brine pump are off and only
the heating medium pump and the electric additional
heat are active. The immersion heater is stepped ac-
cording to the setting in menu 7.1.8.2 - Emergency
mode.
GP2
QM2
The image shows an example of what a cooling section could look
like.
NIBE S1155
QM31
QM34
DRAINING THE CLIMATE SYSTEM
GP1
In order to carry out service on the climate system, it
may be easier to drain the system first. This can be done
in different ways depending on what needs doing:
NOTE
QM1
There may be some hot water when draining
the heating medium side/climate system. There
is a risk of scalding.
Draining the heating medium side in the
cooling module
If, for example, the heating medium pump requires re-
placing or the cooling module requires servicing, drain
the heating medium side as follows:
1. Close the shut-off valves to heating medium side
(QM31) and (QM32).
Connect a hose to the bleed valve (QM1) and open
2.
the valve. Some liquid will run out.
3. Air must get into the system for the remaining liquid
to run out. To let in air, slacken off the connection
slightly at the shut-off valve (QM32) that joins the
heat pump with the cooling module.
When the heating medium side is empty, the required
service can be carried out and/or replacement of any
components carried out.
XL2
XL7
SF1
QM33
QM32
Chapter 10 | Service 59