94
8 System Operation
Fault
Code
No.
Restart according to Description
TRD EN676
141 0 0 Potentiometer faulty, feedback changing too quickly: channel 1
H/Ü The return values of a three-point-step servo output change faster than specified as
maximum in parameters 12-16.
Check the wiring; check the potentiometers for short circuit.
It is possible that the range limit switch is set higher than the end of the range of the
potentiometer. The upper value is exceeded and changes quickly towards zero.
Otherwise, exchange the potentiometers.
142 0 0 Potentiometer faulty, feedback changing too quickly: channel 2
H/Ü See S141
143 0 0 Potentiometer faulty, feedback changing too quickly: channel 3
H/Ü See S141
144 0 0 Potentiometer faulty, feedback changing too quickly: channel 4
H/Ü See S141
145 0 0 Potentiometer faulty, feedback changing too quickly: channel 5
H/Ü See S141
151 >88 3 Reci damper deactivated, out of time in reaching CLOSED position, channel:1
H/Ü The actuating device may not reach its set value since it is limited by a limit switch:
Check the setting of the set values/limit switches.
The actuating device may not have reached its set value quickly enough.
This is especially possible in the case of actuating devices that are activated sepa-
rately and that must then travel the full distance (e.g., recirculation or exhaust valve
or in case of a floating curve switchover):
Increase the adjusting speed on the motor (if possible)
or
Limit the adjusting range by limit switch (to save runtime)
The return does not move even though the actuating device is moving:
Check the connection of the return to the device (see the connection diagram)
To localise the fault, simulate the return at various points of the return circuit (using
a potentiometer or a current sensor).
The motor does not move:
Check whether "OPEN" or "CLOSED" signals are present on the motor.
Check the voltage supply circuit on the motor.
FMS/VMS:
Check whether the "OPEN" or "CLOSED" relay is actuated.
If yes:
Check the fuse of the relay module.
If no:
Make sure that no fault is present (can be seen on the fault LED).
Check the F2 fuse (on the front panel of the power supply unit).
Check the connection between FMS/VMS and the relay module.
152 >88 3 the same as P 151, but channel: 2
H/Ü See S151
153 >88 3 the same as P 151, but channel: 3
H/Ü See S151
154 >88 3 the same as P 151, but channel: 4
H/Ü See S151
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