Krom Schroder PFU 780, Technical Information, Page: 16 / 70

PFU 780 · Edition 02.12 16
Function
Program status
DISPLAY
Fault message (blinking*)
Start-up position/standby 00
Cooling
A0
Waiting time/Pause time 1 Flame simulation, pilot burner
Safety time on start-up, pilot burner 2 Start-up without flame signal, pilot burner
Flame proving period, pilot burner 3 Flame failure during flame proving period, pilot burner
Operation, pilot burner 4 Flame failure during operation, pilot burner
Waiting time, main burner
5
Flame simulation, main burner
Safety time on start-up, main burner 6 Start-up without flame signal, main burner
Flame proving period, main burner 7 Flame failure during flame proving period, main burner
Operation, main burner 8 Flame failure during operation, main burner
Purge P0
Air valve
A
High temperature operation** . .
10
Faulty remote reset
32
Supply voltage too low
33
Faulty parameterisation
35
Short-circuit on a valve output
3 .3 Program status and fault messages
During operation, the 7-segment display shows the program
status. In the event of a fault, the PFU halts the program run,
the display blinks and it then displays the cause of the fault.
The burner control unit can be reset using the Reset button
or the remote reset.
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