FMS Fault Correction Three-point step control output (B)
Aids
B1
Motor does not move Check whether "OPEN" and "CLOSE" relays pull on when the
switch (4) is operated.
If not:
Make sure that there is not a fault
(recognisable from the fault LED)
Check F2 fuse (on power supply front panel)
Check FMS relay-module connection
If so:
Check whether "OPEN" and "CLOSE"
signals are present on motor
Check fuse on relay-module
Check voltage supply circuit of the motor
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B3
Fault 151 201 The control element may not have reached its set-point value rapidly enough.
191 202 Possible especially on control elements that are activated separately and
192 203 then have to run their full travel (e.g. re-circulation damper or flue gas damper
193 204 or in the case of flying curve switching).
194 205
195 Increase control speed on motor (if possible)
or
Limit control range by means of limit switch (in order to save running time)
otherwise
Increase parameters for monitoring bands (if admissible)
(possible only for level 2)
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B4
Fault 171 181 Although the control element is in the monitoring band it does not reach
172 182 the dead band.
173 183
174 184 Increase pulse length for the channel (parameter 730 to parameter 734)
175 185 or
limit switch is too close the programmed top or bottom point.
Adjust limit switch
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After adjusting the limit switch the FMS must read in the range limits again,
see page 116.
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