Service actions
NOTE
Servicing should only be carried out by persons
with the necessary expertise.
When replacing components on VVM 310 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:
႑
The status lamp illuminates yellow.
႑
The display is not lit and the control computer is not
connected.
႑
The temperature at the immersion heater is con-
trolled by the thermostat (FD1-BT30). It is set
between 35 and 45 °C.
႑
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 24 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.
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.
40
Temperature sensor data
Voltage (VDC)Resistance
(kOhm)
Temperature
(°C)
3.256351.0-40
3.240251.6-35
3.218182.5-30
3.189133.8-25
3.15099.22-20
3.10574.32-15
3.04756.20-10
2.97642.89-5
2.88933.020
2.78925.615
2.67320.0210
2.54115.7715
2.39912.5120
2.24510.0025
2.0838.04530
1.9166.51435
1.7525.30640
1.5874.34845
1.4263.58350
1.2782.96855
1.1362.46760
1.0072.06865
0.8911.73970
0.7851.46975
0.6911.24680
0.6071.06185
0.5330.90890
0.4690.77995
0.4140.672100
USB service outlet
LEK
55Chapter 9 | ServiceNIBE™ VVM 310
9 Service
To Next Page
Loading...
