Operating instructions

36
Fault code
on the dis-
play
System characteris-
tics
Cause Measures
Fd Burner blocked Burner control unit
fault
Check ignition electrodes
and connecting cables.
Check whether a strong
interference (EMC) field
exists near the equip-
ment.
Press "Reset" (see
page 36).
Replace control unit if the
fault persists.
FF Burner blocked Burner control unit
fault
Check ignition electrodes
and connecting cables.
Check whether a strong
interference (EMC) field
exists near the equip-
ment.
Press "Reset" (see
page 36).
Replace control unit if the
fault persists.
Press reset
r
Turn rotary selector "rt" less than 2 s
to "
U
RESET", then back to the control
range.
Troubleshooting
Fault messages on the display
(cont.)
5366 836 GB