PRASTEL MLX24V Manual Del Usuario página 19

TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING
Symptom Symptom Symptom Symptom
Green LED flashes
Green LED flashes, 2 fast
Detector remains in detect
after vehicle has left loop
Intermittent detection
No detection
MLX24V
09/12/2013
ENGLISH
Possible cause Possible cause Possible cause Possible cause
Loop wire shorted or open
Loop was previously shorted
or open
7. Faulty loop
8. Poorly crimped terminals
9. Loose connections
9. Faulty loop
10. Poorly crimped terminals
11. Loose connections
12. Cross-talk between
adjacent loops
5. Loop wire shorted or open
6. Loop sensitivity set too low
Solution Solution Solution Solution
Check loop resistance on the
appropriate loop pins on the control
board connector, between .5 ohms and 5
ohms.
Check loop resistance on the
appropriate loop pins on the control
board connector.
9. Perform megger test from loop lead
to ground, should be >100 megohms
10. Check loop connections to terminals
11. Check splices are properly soldered
and sealed against moisture
12. Observe display, level indicated on
display indicates residual frequency
shift from vacant loop to vehicle
presence, press Frequency Count
switch to re-initialize the detector
5. Perform megger test from loop lead
to ground, should be >100 megohms
6. Check loop connections to terminals
7. Check splices are properly soldered
and sealed against moisture
8. Set adjacent loops to different
frequencies (see Frequency Setting)
5. Check loop resistance on the
appropriate loop pins on the control
board connector, between .5 ohms
and 5 ohms.
6. With vehicle on loop, observe
display, set sensitivity to the level
indicated on the display
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