I want to see more info about the alarm
I want to change settings for my system
Your system has an active alarm.
Please select an action below or contact your installer.
12°C 13.45 3 October
Reset alarm
Auxiliary operation
S1155/S1255 has no contact with the outdoor temperature sensor. Calculated
flow line temperature is set to min. flow line. If a higher temperature is desired
then min. flow line can be temporarily changed in menu 1.30.4. Check the
connection to the outdoor temperature sensor and reset the alarm. If the alarm
recurs, select aid mode and contact your installer.
12°C 13.45 3 October
In the event of an
alarm, a malfunction
has occurred and the
status lamp shines
with a steady red
light. You receive in-
formation about the
alarm in the smart-
guide on the dis-
play.
ALARM
In the event of an
alarm with a red
status lamp, a mal-
function has occurred that S1155/S1255 cannot remedy
itself. On the display, you can see what type of alarm it
is and reset it.
In many cases, it is sufficient to select “Reset alarm”
for the installation to revert to normal operation.
If a white light comes on after selecting “Reset alarm”,
the alarm has been remedied.
It the red light is still on or if the alarm recurs, the cause
of the problem remains.
"Auxiliary operation" is a type of emergency mode. This
means that the installation attempts to produce heat
and/or hot water, even though there is some kind of
problem. This could mean that the heat pump’s com-
pressor is not in operation. In this case, any electric ad-
ditional heat produces heat and/or hot water.
Caution
Selecting "Auxiliary operation" is not the same
as correcting the problem that caused the
alarm. The status lamp will therefore remain
red.
If the alarm does not reset, contact your installer for
suitable remedial action.
Caution
You need the product's ((14 digit) serial number
for servicing and support.
If the operational interference is not shown in the display
the following tips can be used:
BASIC ACTIONS
Start by checking the following items:
• Group and main fuses of the accommodation.
• The property's earth circuit breaker.
• Correctly set load monitor (if installed).
LOW HOT WATER TEMPERATURE OR A
LACK OF HOT WATER
S1155: This part of the fault-tracing chapter only applies
if a water heater is installed in the system.
• Closed or choked filling valve for the hot water.
– Open the valve.
• Mixing valve (if there is one installed) set too low.
– Adjust the mixer valve.
• S1155/S1255 in incorrect operating mode.
– Contact your installer!
• Large hot water consumption.
– Wait until the hot water has heated up. Temporarily in-
creased hot water capacity can be activated in home
screen "hot water" or in menu 2.1.
• Too low hot water setting.
– Enter menu 2.2 and select a higher demand mode.
13Chapter 6 | Disturbances in comfortNIBE S1155/S1255
6 Disturbances in comfort
In most cases, S1155/S1255 notes a malfunction (a
malfunction can lead to disruption in comfort) and indic-
ates this with alarms, and instructions for action, in the
display.
Info-menu
All the heat pump's measurement values are gathered
under menu 3.1 (Operating info) in the heat pump' menu
system. Examining the values in this menu can often
make it easier to identify the source of the fault.
Manage alarm
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