Specifications

Printed in the United Kingdom for TSO
J002593116 C15 04/12
Trouble-shooting guide (continued)
Problem
Possible cause Remedy
Long gap between last
All-Red setting too long Decrease setting
vehicle clearing shuttle lane
and start of next green
Detector fault – working fixed time Call service engineer
Signals do not remain on
Detector fault – working fixed time Call service engineer
red in absence of vehicles
Switched to Fixed Time Switch to VA
Misaligned detectors Re-align detectors
*’Nudge circuit’ operating No action
Signals do not change
Faulty detector (MVD) Call service engineer, work
after one stream has
signals MANUALLY or FT until
stopped, even though
engineer arrives.
vehicles are waiting
* See page 14 for nudge circuit.
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