GTT Canoga C924 Series, Installation Manual, Page: 69 / 81

Canoga™ Vehicle Detectors
Canoga™ C924X Series Installation Manual
Troubleshooting – 63
7.4 Diagnostic Codes
The C924X vehicle detectors have LED indicators on the front panel that display fault conditions.
Table 8-1 lists the diagnostic codes that the LED indicators display when a fault occurs. There is one
red Fault LED and one green Detect LED for each input channel.
Table 7-1 Diagnostic Codes
Diagnostic Codes Problem Solution
Channel 1 and 2 red Fault LEDs
repetitively cycle ON then OFF in
sequence.
Settings stored in EEPROM
(programmable memory) are
corrupt.
Reset the vehicle detector using power switch
or C900-CS. The error should clear in about 5
seconds. All settings will return to hardware
defaults.
A red Fault LED repetitively cycles
ON for one long pulse (6 sec.) and
one short pulse (.25 sec.).
Historical open loop.
Use C900-CS to check the Date/Time when the
most recent fault was recorded. If desired,
reset the vehicle detector to clear the fault
indication.
A red Fault LED repetitively cycles
ON for one long pulse (6 sec.) and
two short pulses (.25 sec.).
Historical shorted loop.
Use C900-CS to check the Date/Time when the
most recent fault was recorded. If desired,
reset the vehicle detector to clear the fault
indication.
A red Fault LED repetitively cycles
ON for one long pulse (6 sec.) and
three short pulses (.25 sec.).
Historical inductance change
greater than 25%.
Use C900-CS to check the Date/Time when the
most recent fault was recorded. If desired,
reset the vehicle detector to clear the fault
indication.
A red Fault LED repetitively cycles
ON for one long pulse (1 sec.) and
one short pulse (.25 sec.). Detect
LED constantly ON.
Open loop.
Correct the problem with the loop. If no loop
is connected to the vehicle detector channel,
turn the channel off and place a short across
the loop terminals.
A red Fault LED repetitively cycles
ON for one long pulse (1 sec.) and
two short pulses (.25 sec.). Detect
LED constantly ON.
Shorted loop. Correct the problem with the loop.
A red Fault LED repetitively cycles
ON for one long pulse (1 sec.) and
three short pulses (.25 sec.).
Detect LED constantly ON.
Inductance change greater
than 25%.
Correct the problem with the loop. This
problem is frequently caused by changing of
resistances in channel sensor connections.
(Check the loop connections. Make sure all
connections are secure.) It is common for this
sensor “failure” condition to be induced during
lightning storms.
Green Detect LED constantly ON.
External reset is active (tied
to ground). Also, there is
currently a loop fault.
Correct the situation causing the remote reset
input to be continuously active. Correct the
loop problem.