Codan NGT 2010 RF - Figure 9: NRI fault diagnosis chart

NRI—Fault finding
NGT Transceiver System Technical Service Manual 279
Figure 9: NRI fault diagnosis chart
flashing
green
Off
Yes
No
Yes
No
No
Yes
not
green
NRI fault diagnosis
chart
Is the power
supply connected to
the NRI and
switched on?
NRI OK.
Connect the power
supply and switch
on the power.
Check for power
between TP101 and
GND on the NRI
User Connect PCB.
Power supply OK.
Power supply may
be faulty.
Fault find the
power supply.
Is the
LED on the
front panel of the
NRI flashing a
colour other
than green?
Test the NRI
Microcontroller PCB.
What is the
status of the LED
on the front panel
of the NRI?
Is the voltage
+13.5 V nominal?
(10.5 to 15 V
allowable)