Viessmann VITOFLAME 200, Service Instructions Manual

Page: 18 / 34

Troubleshooting
18
Diagnosis
(cont.)
Fault/system characteristics Flashing
code red Cause of fault Check
Burner does not start,
demand lamp does not
illuminate.
No voltage. Check the fuse in the control unit,
check the electrical connections, the
position of the ON/OFF switch on
the control unit and the mains
electrical isolator.
High limit safety cut−out
activated. Press the reset button on the boiler
control unit.
Vitoair motor faulty. Replace the Vitoair motor.
Burner does not start
(voltage present),
demand lamp illuminated.
Gas flow pressure too
low, gas governor cuts
out. Check the gas flow pressure. The
gas flow pressure should be at least
20 mbar; clean gas filter, if
necessary.
Gas burner control unit
faulty. Replace the gas burner control unit.
Fuse in the leak detector
device blown. Replace the fuse.
Fault during leak test
(fault lamp illuminates). Check the gas train pressure nipple
for leaks.
If the valves leak, replace the gas
train.
Leak detector faulty. Replace the leak detector.
3×flashes
DDD
Burner motor faulty. Replace the burner motor.
19×flashes
DDDDDDDDDD
DDDDDDDDD
External voltage across
output terminals. Check whether the burner control
unit receives external voltages (e.g.
via S3).
20 ×flashes
DDDDDDDDDD
DDDDDDDDDD
Internal device error. Replace burner control unit.
Burner does not start
goes into a fault state after 4×flashes
DDDD
Air pressure switch
faulty. Replace the air pressure switch or
check its settings.
g
approx. 65 s.
4×flashes
DDDD
Ionisation cable or
electrode earthing. Remove earthing.
The burner motor starts, but
during the pre−purge phase 3×flashes
DDD
Dirty air pressure switch
connection. Clean the connection.
g p p g p
the system creates a fault
shutdown.
3×flashes
DDD
Air pressure switch
incorrectly set or faulty. Adjust or replace the air pressure
switch (see page 10).
3×flashes
DDD
Air pressure too low. Clean impeller (see page 11).
Burner starts up, but no
flame is formed.
2×flashes
DD
Ignition electrode poorly
adjusted. Adjust correctly (see page 22).
2×flashes
DD
Ignition electrodes damp
and contaminated. Clean ignition electrode.
2×flashes
DD
Insulation of ignition
electrode cracked. Replace the ignition electrode.
2×flashes
DD
Ignition transformer
faulty. Replace ignition transformer.
2×flashes
DD
Ignition cable earthing. Replace ignition cable.
5692449 GB