4-10
Chapter 4 IDNAC Power Supply
Troubleshooting, Continued
System Trouble
LED Codes
System troubles are indicated by LEDs A to D.
Table 4-12. System Trouble LED Codes
ABCD Description:
No Trouble: There are no troubles detected on the system.
AC Fail: The AC power is disconnected but the battery is working.
Low Battery: The battery voltage is under 22.8 V.
Battery Cutout: The Battery voltage is below 19.4 V. At this point, if jumper
P16 is set to “battery disconnect when depleted”, the system will shut down.
Depleted/Missing Battery: If jumper P16 is not set to “battery disconnect
when depleted”, this trouble will appear when the battery voltage is below
19.4 V. This code will also appear if the system cannot detect the battery.
Charger Trouble: There is a trouble with the battery charger.
Card Overcurrent: The module is drawing too much current.
Negative Earth: The circuit is shorted to ground on the negative wire.
Positive Earth: The circuit is shorted to ground on the positive wire.
Negative Earth on RUI: The RUI circuit is shorted to ground on the negative
wire.
Positive Earth on RUI: The RUI circuit is shorted to ground on the positive
wire.
City Circuit 1 Trouble: The trouble configured on the City Card’s circuit one
has been triggered.
City Circuit 2 Trouble: The trouble configured on the City Card’s circuit two
has been triggered.
AuxNAC Open: Depending on the chosen configuration, either the Aux circuit
or the NAC circuit is open.
AuxNAC Short: Depending on the chosen configuration, either the Aux circuit
or the NAC circuit is experiencing a short circuit.
AuxNAC Overcurrent: Depending on the chosen configuration, either the
Aux circuit or the NAC circuit is drawing too much current.
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