Service actions
NOTE
Servicing should only be carried out by persons
with the necessary expertise.
When replacing components on VVM 310 only re-
placement parts from NIBE may be used.
EMERGENCY MODE
Emergency mode is used in event of operational interference
and in conjunction with service. Hot water capacity is re-
duced in this mode.
Emergency mode is activated by setting switch (SF1) in
mode "
". This means that:
•
The status lamp illuminates yellow.
•
The display is not lit and the control computer is not con-
nected.
•
The temperature by the immersion heater is controlled by
the thermostat (FQ10-BT30). It can be set to 35 or 45 °C.
•
Only the circulation pumps and electric additional heat
are active. The electrical additional heat power in emer-
gency mode is set in the immersion heater board (AA1).
See page 23 for instructions.
EMPTYING THE HOT WATER COIL
The hot water coil is most easily drained by detaching the
cold water pipe at the coils's entry to the reservoir.
NOTE
There may be some hot water, risk of scalding.
DRAINING THE CLIMATE SYSTEM
In order to carry out service on the climate system, it may
be easier to drain the system first using drain valve (QM1).
NOTE
There may be some hot water when draining the
heating medium side/climate system. There is a
risk of scalding.
W
ilo
W
ilo
VVM 310
QM1
TEMPERATURE SENSOR DATA
Voltage (VDC)
Resistance (kOhm)
Temperature (°C)
3.047
56.20
-10
2.889
33.02
0
2.673
20.02
10
2.399
12.51
20
2.083
8.045
30
1.752
5.306
40
1.426
3.583
50
1.136
2.467
60
0.891
1.739
70
0.691
1.246
80
51
Chapter 9 | Service
NIBE VVM 310
Service
