Status Indicator Of The Burner Control Unit - Bosch Condens 7000 F Installation And Maintenance Instructions For The Contractor

1)
Type Error Sub- Cause
code code
V EE 612 Readings of the
return
temperature
sensor
V EE 613 Flow temperature
sensor reading
V LL 571 Too many restarts
despite resetting.
V LP 570 Too many resets
via the interface.
Table 17 Fault displays1) V = locking; B = blocking
14.4

Status indicator of the burner control unit.

The lighting of the reset button displays the current operating condition.
Operating condition
Burner control unit is in operation ................................................................................................................... on
The burner control unit is in the
locked-out fault status
The boiler control unit is in
emergency operation,
communication disrupted
The burner control unit is not in
operation
Table 18 Display of the operating condition of the burner via the lighting of the reset button.
... Permanently

Off

GREEN
Condens 7000 F – 6720871560 (2019/11)
Description
Successive return
temperature readings are
too widely divergent.
Successive flow
temperature readings are
too widely divergent.
15 restarts have occurred
in direct succession. This
means that the same
problem persisted after
the resets.
Please note: this fault can
only be reset via the reset
button on the burner
control unit.
Too many resets have been
received via the interface
within a certain period.
Please note: this fault can
only be reset via the reset
button on the burner
control unit.
Colour code
.............................................................

.................................................................................................................. Off
Test procedure/Cause
Check the cable running to the return
temperature sensor and the
contacts.
Check plug-in connector.
Check sensor readings against table. ▶ Replace temperature sensor if there
Burner control unit defective.
Check the cable running to the flow
temperature sensor and the
contacts.
Check plug-in connector.
Check sensor readings against table. ▶ Replace temperature sensor if there
Burner control unit defective.
Faults have continually been reset
and not rectified.
Faults have continually been reset
and not rectified.
The basic controller has developed a
fault, which is causing constant
resets.
The burner control unit has
malfunctioned.
Operating and fault displays
Action
▶ Replace if damaged.
▶ Clean if dirty or replace if necessary.
▶ Reconnect any loose plugs.
are discrepancies.
▶ If the connecting lead, contacts and
resistance values are all OK, replace
the burner control unit.
▶ Replace if damaged.
▶ Clean if dirty or replace if necessary.
▶ Reconnect any loose plugs.
are discrepancies.
▶ If the connecting lead, contacts and
resistance values are all OK, replace
the burner control unit.
▶ Identify and eliminate the cause of
the faults leading to the resets.
▶ Identify and eliminate the cause of
the faults leading to the resets.
▶ Replace basic controller.
▶ Replace burner control unit.
Lighting of the reset
button
flashes slowly
flashes quickly
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