Service actions
NOTE
Servicing should only be carried out by persons
with the necessary expertise.
When replacing components on VVM 325 only
replacement parts from NIBE may be used.
Emergency mode
Emergency mode is used in event of operational inter-
ference and in conjunction with service. Hot water ca-
pacity is reduced in this mode.
Emergency mode is activated by setting switch (SF1)
to ” ”. This means that:
■
The status lamp illuminates yellow.
■
The display is not lit and the control computer is not
connected.
■
The temperature at the immersion heater is con-
trolled by the thermostat (FD1-BT30). It can be set
to 35 or 45 °C.
■
Only the circulation pumps and electrical addition
are active. The electrical addition power in emergency
mode is set in the immersion heater card (AA1). See
page 26 for instructions.
Draining the climate system
In order to carry out service on the climate system, it
may be easier to drain the system first using the filler
valve (QM11).
NOTE
There may be some hot water when draining
the heating medium side/climate system.
There is a risk of scalding.
1.
Connect a hose to the lower filler valve for heating
medium (QM11).
2.
Open the valve to drain the climate system.
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