MR tapcon 240 - Fault elimination; General faults; No regulation in AUTO mode

9 Fault elimination
Maschinenfabrik Reinhausen 2014146 222/08 ENTAPCON® 240
Fault elimination
This chapter describes how to eliminate simple operating faults.
General faults
Characteristics/detail Cause Remedy
No function
▪ Operating status LED
does not illuminate
No power supply Check the power supply
Fuse tripped Contact Maschinenfabrik Reinhausen
GmbH
Relays chatter Supply voltage too low Check the supply voltage
High EMC load Use shielded cables or external filters
Poor grounding Check the functional ground
Table 36: General faults
No regulation in AUTO mode
Characteristics/detail Cause Remedy
Device control commands
have no effect.
▪ RAISE/LOWER LEDs
light up periodically
LOCAL/REMOTE switch in
motor-drive unit switched to
LOCAL.
Check operating mode and switch to RE-
MOTE if necessary.
No connection Check wiring as per connection diagram.
Device blocking Negative power flow Check current transformer polarity.
Control inputs have duplicate
parameterization.
Check parameterization of control inputs.
A function may only be assigned to one
control input.
A control input is parameter-
ized with blocking and a sig-
nal is present at this control
input.
Check parameterization and status of
control input under Info (Input/Output Sta-
tus). If necessary, change parameteriza-
tion or deactivate signal source.
NORMset is active, but has
not been started up correctly
Activate operating mode and perform
a manual tap-change operation using
keys or . Then activate operating
mode .
Device blocking
▪ LED V< illuminated
Undervoltage blocking active Check parameters
Device blocking
▪ LED V> illuminated
Overvoltage blocking active Check parameters
Device blocking
▪ LED I> illuminated
Overcurrent blocking active Check parameters
Bandwidth set too high - Determine recommended bandwidth
[► 68] and set parameters.
Table 37: No regulation in AUTO mode
9
9.1
9.2