Voith BTS User Manual

BTS, non
-contacting thermal switch unit
Malfunctions - Remedial Actions, Troubleshooting
Installation and Operating Manual / Version 10 / 3626-011500 en / Protection Class
0: public / 2017-12-15
38
Malfunction
Possible
cause(s)
Remedial action
See
After the start-up by-pass
time, operating fluid is
leaking through the
fusible plugs, the BTS did
not display any excessive
temperature.
The nominal response
temperatures of
switching element and
fusible plugs do not
match.
Please consult Voith
Turbo.
Chapter 12
The switching element
is defective.
Check the switching
element, and replace it,
if necessary.
Please consult Voith Turbo (

Chapter 12), if a malfunction occurs which is not included in this
table.
Table 12
In order to determine the cause of failure more precisely, the following
measures should be taken in the corresponding order:
Measurement
Result
Probable
troubleshooting
Apply supply voltage to the
evaluator.
Measure the no-load voltage and
the short-circuit current at the
NAMUR input (terminals 9 and 8).
Clear deviation from the
setpoints:
- no-load voltage 8.2 V DC
- short-circuit current 6.5 mA
Defective evaluator.
Connect the initiator to the
evaluator.
Measure the current consumption
of the initiator which is not
attenuated.
Current consumption
> 6.0 mA
or
< 2.1 mA
Defective initiator.
Connect the initiator to the
evaluator.
Measure the current consumption
of the initiator which is attenuated.
Note:
The initiator can, for example, be
attenuated with a metal plate which
is held directly in front of the
initiator head.
Current consumption
> 1.2 mA
or
< 0.1 mA
Defective initiator.
Attenuate the initiator, after proper
installation, with the switching
element, with the turbo coupling
not being overheated.
Current consumption
> 1.2 mA
and
< 6.0 mA
Defective switching
element.
Table 13

Voith BTS Specifications

General

Brand	Voith
Model	BTS
Category	Switch
Language	English