KSB Cervomatic EDP.2, Installation & Operating Manual

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8 Trouble-shooting
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Cervomatic EDP.2
Display
Fault message
Description
System behaviour Remedy
A4
A4
OVERCURRENT
Fault message:
LED "FAILURE" FLASHES (FAULT).
Fault message after acknowledgement:
LED "FAILURE" ILLUMINATED (FAULT).
The pump has an overcurrent protective
device that responds in accordance with
the value defined in the configuration
menu. These overcurrents generally
pertain to pump malfunctions or power
supply faults.
If this fault is detected, the
system attempts to restart the
pump four times. If the pump
still does not start after the
fourth attempt, it remains
stopped until the fault has been
rectified. Check the status of the pump.
Impeller is blocked.
Verify the amperage entered in
the configuration menu (it is
recommended that you always
set the amperage to 15 % above
the rated pump current).
Check the fuses for damage.
The pump is put back into
operation as soon as the
problems have been resolved.
The INSTALLATION menu is then
displayed for entering the
appropriate amperage.
(
ð
Section 6.2.2, Page 16)
A5
A5
PUMP OFF
Fault message after acknowledgement:
LED "FAILURE" ILLUMINATED (FAULT).
The automatic control unit does not
detect any throughflow and stops the
pump to prevent greater damage from
occurring. There are 3 fuses, each of
which has a 10 A rating. Use suitable
fuses if pumps with different current
input are operated.
The system remains stopped
until the problem has been
resolved by implementing
appropriate measures. Check the status of the fuses
and replace the fuses if
necessary.
The motor winding and current
input of the pump should also
be checked. The pump is put
back into operation as soon as
the problems have been
resolved.
The INSTALLATION menu is then
displayed for entering the
appropriate amperage.
(
ð
Section 6.2.2, Page 16)
A6
A6
ACCUMULATION
Fault message after acknowledgement:
LED "FAILURE" ILLUMINATED (FAULT).
The system checks the status of the
accumulator at regular intervals.
This occurs only in pressure-dependent
mode.
2)
The system continues to operate
even if the pressure in the
accumulator is insufficient. It is
highly recommended that you
check the accumulator
immediately. The system has detected that
the accumulator is damaged.
Check the pre-charge pressure
of the accumulator, the status of
the membrane and the spherical
accumulator and replace the
membrane if necessary.
(
ð
Section 6.2.3, Page 18)
None No display
-
-
- Check the electrical connection
and power supply.
Call in customer service.
2)
No longer available from 2014 production date