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© 2016 Sensata Technologies
Troubleshooting
5.0
AGS-N Controller Troubleshooting
5.1
Using the AGS-N’s LED Indicators
The AGS’s two LEDs can assist you with troubleshooting the AGS
system. The STATUS LED is bi-color (green or red) and indicates the
AGS’s operational status. The READY LED is green, and illuminates if
the AGS has power and the remote temp sensor is connected.
The AGS controller performs a “self test” when power is
¿
rst applied
(see functional operation tests in Section 4.0). If the generator does
not start and stop as expected, refer to Table 5-1 below.
WARNING: To be safe, unplug the green 8-port terminal
block from the ME-AGS-N before performing maintenance on
the electrical or generator system.
LED
SYMPTOM
SOLUTION
STATUS solid
red = Gen fault
1) Gen won’t start;
or 2) Gen won’t
run. It starts, but is
stopped by the AGS
(B+ or gen run sense
voltage not sensed
to Terminal 2).
Check generator to AGS start
wiring; or, check B+ wiring from
generator to AGS. Measure DC
voltage from Terminal 2 (+)
to Terminal 4 (–), ensure DC
voltage is 10-40 volts only when
the generator is running.
STATUS
À
ashes
green = Gen
start initiated
Gen start initiated.
No problem – normal operation.
STATUS solid
green = Gen run
Gen is running.
No problem – normal operation.
READY LED off
= No power
connected to the
AGS
DC voltage to
Terminals 3 (+) and
4 (–) on controller
missing or incorrect.
1) Check battery voltage.
2) Check fuse.
3) Check DC wiring.
READY
À
ashes
green = Temp
sensor not
detected
Note: Connect
temp sensor if
temp autostart
feature needed.
The temp sensor
is not sensed or
plugged into the
purple REMOTE port.
1) Check the temp sensor cable
and its connection to the purple
REMOTE port, or
2) Check the temp sensor cable
for any damage.
3) Replace temp sensor cable.
READY solid
green = Power
& temp sensor
connected
The temp sensor is
connected to the
purple REMOTE port.
No problem – normal operation.
Table 5-1, AGS
-
N Controller Troubleshooting Guide