15
12.1 Communication
The control box communicates by using a flash code.
An LED inside the reset button of the control box dis-
plays this flash code.
flash code
meaning of codes
│││.
waiting time Tw
││││.
pre-ignition (Tvz)
▌│.
safety time (Ts) and post ignition time (Tn)
▌││.
delay time to valve V2 (Tv2)
│.
running
table 04 Program phases
flash code
meaning
cause
│▌▌.
low mains voltage (shut down)
│▌.
Internal fuse defect
control box defect
│▌▌▌▌
lock out
no flame detection within safety time Ts
││▌▌▌
early flame
Ionisation probe may be faulty
││▌▌▌▌▌▌▌▌
manual lock out
table 05 Error messages
▌
= long pulse
│
= short pulse
.
= short pause
12.2 Fault causes
In case of a failure the LED is permanently illuminated.
Every 10 seconds the illumination is interrupted by a
flash code.
In case of all failures the gas supply is interrupted.
Fault Possible
cause:
Burner not working =>
shut down
- no heat demand
- no mains supply
- voltage < 187 V
- continuously tension on
terminal A
2-3 seconds after apply-
ing mains =>
lock out
- control box not reset
Burner starts, no flame
=> lock out
- false flame detected
- no
ignition
- no gas supply
Burner starts, flame
established => lock out
after safety time (Ts)
- ionisation current < 1,5 µA
- phase and neutral
reversed
- ionisation probe damaged
or dirty
table 06 Trouble shooting
