Operation
28
Operating instructions
VITOBLOC 200 EM-530/660
version
SCR
58
4
1
4
3
5
GB
Pos. Message text
Possible cause of fault
Measures to rectify the fault
11
UDS AdBlue
TM
pump cable break
●
UDS faulty
●
Replace UDS.
12
UDS AdBlue
TM
pump short circuit
GND
●
UDS faulty
●
Replace UDS.
13
UDS AdBlue
TM
pump short circuit
VBB
●
UDS faulty
●
Replace UDS.
14
SCR miscalculation
●
Problem during data
processing.
●
Contact Viessmann Service.
15
SCR temperature sensor faulty
●
Cable break or sensor faulty.
●
Check cable and replace if
necessary.
●
Replace temperature sensor.
16
SCR overmetering of NH
3
●
Engine adjustment faulty
(untreated NOx emissions too
high)
●
Metering curve unsuitable.
●
Check engine adjustment and
untreated emissions.
●
Adjust metering curve.
17
KL15 off
●
Faulty power supply.
●
Check wiring.
18
5 V missing
●
DC-DC converter faulty.
●
Replace DC-DC converter
Tab. 2
Fault messages on the SCR system programming and display unit
