Faults Which Are Not Displayed At The Programming Unit - Viessmann Vitotronic 200 KW2 Installation And Service Instructions Manual

Faults which are not displayed at the programming unit

Boiler cold, burner does not start
Set the emissions test switch to h
H Pumps are not running →
Check the supply voltage (mains electrical isolator, mains supply cable,
plug fÖ, mains ON/OFF switch, fuse F1, T6.3 A and F2, T4 A).
Fuse F1 or F2 faulty:
1. Disconnect all 230 V plugs (pumps, burner, mixer motors etc.).
2. Replace the F1 fuse.
3. To determine the faulty device, reconnect all 230 V equipment in
sequence, until the faulty device is located.
H Pumps are running → H Pumps are running →
Is plug fA 'live' between L1 and N?
No
Check plug fA, the burner
connecting cable and the
high limit safety cut−out as
well as any other limit
switches (low water (
indicator, pressure switch,
etc.). etc )
Yes
The fault is unlikely to be due to Vitotronic.
Instead, the burner connection area or the
burner itself may be the cause:
Is terminal T1 of plug fA 'live' when
connected?
No
Check any burner
equipment (fuses,
gas governor, etc.).
Troubleshooting
Yes
Press the test button;
the burner should
then start in
accordance with the
delay time (e.g. oil
preheating). If the
burner is still not
operating, repeat the
previous checking
steps.
It may be that faulty
accessories are
preventing the burner
from starting.
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