Read Status

Operating Instructions

4.22.3 Power

Pressing 3 while viewing Read Status Screen #1 will cause the following screens to be displayed:

 

 

POWER

 

 

 

BATTERY

27.21V

 

 

24 V RST

25.31

 

 

 

 

 

 

Power Screen #1

 

 

 

 

 

 

 

POWER

 

 

 

CHARGER

28.36V

 

 

NAC 1

-1.49V

 

 

NAC 2

-1.49V

 

 

 

 

 

 

Power Screen #2

 

 

 

 

 

 

 

POWER

 

 

 

NAC 3

-1.49V

 

 

NAC 4

-1.49V

 

 

 

 

Power Screen #3

A real-time display of the control panel voltages can be used to determine if a problem exists in the system. Note that Power Screen #3 will only be displayed if the NACKEY NAC option card is installed, in JP8 of the main circuit board, for Class B operation.

The following table lists the circuit being measured, possible conditions and their respective voltage ranges:

Circuit

Condition

Voltage Range

 

 

 

 

Normal Battery (nominal)

27.05 to 28.15 VDC

Battery

Low Battery

20.0 to 20.8 VDC

 

No Battery

0 to 18.36 VDC

 

 

 

24V Resettable

Normal

21.25 to 27.50 VDC

 

 

 

24V Nonresettable

Normal

21.25 to 27.50 VDC

 

 

 

Charger

Normal

21.87 to 29.84 VDC

 

 

 

 

Normal

-1.3 to -1.6 VDC

NAC 1 or NAC 2

Open Circuit

-2.3 to -2.5 VDC

 

Short Circuit

0 to 1.0 VDC

 

 

 

MS-9200UDLS PN 52750:A 11/04/05

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