Checklist For Troubleshooting And Error Correction - tams elektronik GBM-1 Manual

GBM-1

6. Checklist for troubleshooting and error correction

Warning:
!
If you notice a strong heat development, immediately disconnect the connection to the
supply voltage. Fire hazard!
Possible causes:

One or more connections are faulty. à Check the connections.

"Kit" version: one or more components are soldered incorrectly. à Carry out a visual
inspection (à section 3.5.) and eliminate the faults, if necessary.

The track occupancy detector is defective. à Send the detector in for inspection.
Faulty occupancy indications on the integrated LEDs
The LEDs light up dimly although the track sections are not occupied.
Possible cause:

A consumer is connected to the outputs of the GBM which operates with a higher voltage
than the GBM. à Remove the LEDs on the track occupancy indicator.
One or more LEDs do not light up although the associated track sections are occupied.
Possible cause:

The GBM is not correctly connected to the track sections, its power supply and/or the
driving transformer. à Check the connections.

There is a connection between the monitored section and the earth connection of the
driving transformer. à Check the connections.
Faulty occupancy indications on external lamps or LEDs
Possible causes:

The voltage supply has been interrupted. à Check the connection from the module to the
transformer.

One or more lamps are defective. à Check the lamps by connecting them directly to the
power supply.

"Kit" version: The diode D1 is soldered in the wrong direction. à Change the mounting
direction!
Unreliable occupancy signals in combination with digital feedback devices
Possible cause:

The LEDs on the track busy indicator create external voltages which affect the digital
feedback module. à Demount the LEDs from the track busy indicator.

Interference voltages from the digital system generate (false) occupancy signals. The
GBM-1 is obviously not suitable for this application due to its high sensitivity. à Replace
the GBM-1 with a less track occupancy detector optimised for use in digital systems (e.g.
GBM-8 or GBM-8.2**).
22 | Checklist for troubleshooting and error correction
tams elektronik