Krom Schroder BCU 46 Series Operating Instructions Manual page 18

!
Short-circuit or discontinuity on the flame signal
cable.
!
Soiled UV sensor.
• Remedy fault.
E
? The display blinks and indicates
! Actuation of the remote reset input is faulty.
! Too many remote resets. More than 5 resets
have been conducted within the last 15 minutes,
either automatically or manually.
! Consecutive fault caused by a previous fault
whose actual cause has not been remedied.
• Pay attention to previous fault messages.
• Remedy cause.
▷ The cause will not be remedied by performing a
reset every time a fault lock-out occurs.
• Check whether remote reset complies with
standards (EN 746 allows resetting only under
supervision) and correct if necessary.
▷ The BCU may only be reset manually under su-
pervision.
• Press the Reset/Information button on the BCU.
E
? The display blinks and indicates
! Too many restarts for burner 1. More than 5 re-
starts initiated within the last 15 minutes.
• Check burner settings.
▷ Ensure that the flame signal is above the switch-
off threshold during operation.
• Check the settings for capacity control during
operation.
• Press the Reset/Information button on the BCU.
E
? The display blinks and indicates
! Too many restarts for burner 2. More than 5 re-
starts initiated within the last 15 minutes.
• Check burner settings.
▷ Ensure that the flame signal is above the switch-
off threshold during operation.
• Check the settings for capacity control during
operation.
• Press the Reset/Information button on the BCU.
E
? The display blinks and indicates
! Inputs 40 and 41 are activated simultaneously.
1 0
E 10 .
1 1
E 11 .
1 2
.
E 12
2 1
E 21 .
• Check input 41.
▷ Input 41 may only be activated if the valve is
open.
• Check input 40.
▷ Input 40 may only be activated if the valve is in
the position for ignition capacity.
? The display blinks and indicates
! The butterfly valve position is not constantly sig-
nalled back to the BCU.
• Check the wiring and ensure that the position for
max. capacity/ignition capacity of the butterfly
valve is constantly signalled back via terminals
41 and 42.
E
? The display blinks and indicates
! Abnormal data change in the parameters set for
the BCU.
• Reset the parameters to their original values using
the BCSoft software.
• Establish the cause of the fault to avoid repeat
faults.
• Ensure that the cables have been installed prop-
erly – see page 5 (Cable selection and instal-
lation).
• If the measures described above do not help,
remove the unit and return it to the manufacturer
for inspection.
? The display blinks and indicates
! Supply voltage too low or too high.
• Operate the BCU in the specified mains voltage
range (mains voltage +10/-15%, 50/60 Hz).
! An internal device error occurred.
• Remove the unit and return it to the manufacturer
for inspection.
? The display blinks and indicates
! Faulty parameterization.
• Check parameter settings using BCSoft.
! An internal device error occurred.
• Remove the unit and return it to the manufacturer
for inspection.
GB-18
E 2 2
E 22
E 3 1
3 0
E 30
E 3 2
E 32
E 3 3
E 33
.
, E 31 .
.
.