Disturbances in comfort
In most cases, RMU S40 notes a malfunction (a malfunction
can lead to disruption in comfort) and indicates this with
alarms, and instructions for action, in the display.
MANAGE ALARM
Heating
Alarm
Below is a brief description
of the alarm, as well as
proposed actions.
Show more information
ALARM
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Alarm
Reset alarm
Activate auxiliary operation
In the event of an alarm, some type of
malfunction has occurred, which is indic-
ated by the status lamp shining with a
steady red light. A dialogue box appears
in the display, containing information
about the alarm.
ALARM
In the event of an alarm with a red
status lamp, a malfunction has occurred.
The display shows what type of alarm it
is and lets you reset the alarm.
In many cases, it is sufficient to select
“Reset alarm” for the installation to re-
vert to normal operation.
If the alarm indication disappears after
you have selected “Reset alarm”, the alarm has been
remedied. If the alarm recurs, the cause of the problem re-
mains.
"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 compressor is not in oper-
ation. In this case, any electric additional heat produces heat
and/or hot water.
Caution
To select "Auxiliary operation", an alarm action
must be selected in menu 7.1.8.1 – "Alarm actions"
in the main product.
Caution
Selecting "Auxiliary operation" is not the same as
correcting the problem that caused the alarm. The
status lamp will therefore remain red.
TROUBLESHOOTING
COMMUNICATION ERROR
RMU S40 has lost contact with the main product.
Wireless connection
•
Check that the distance between the main product and
RMU S40 is not too great.
•
If the communication is weak between the main product
and an accessory in a zone, a repeater (RPP 10) may need
to be installed to amplify the signal between the zones.
Wired connection
•
Check that the cable is correctly connected between
RMU S40 and the main product.
•
Check that the addresses in the room unit's "Installation"
menu and the main product’s 7.2.1 menu correspond.
THE DISPLAY IS OFF
No information is visible on the display.
•
Check that the screensaver is active by pressing the
screen.
•
Check that the On/Off button is set to On.
•
Check that the cable is correctly connected between
RMU S40 and the main product.
•
If RMU S40 is set to "Night mode", the display is off. (See
NIBE RMU S40 | GB
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