Document #15140 Rev.G 01/02/02 P/N 15140:G
65
Troubleshoot Mode
5.3.2 AC Line Voltage
The following table lists the AC line voltage range. The AC On indicator will turn off when the AC line voltage
drops below the Low Line threshold and the trouble LED will turn on.
5.3.3 Battery Voltage
The following table lists the critical battery threshold conditions.
Note that battery measurements should be made
after allowing 48 hours to charge depleted batteries. If batteries do not show normal readings, replace them.
IMPORTANT:
The battery charger will turn off when the battery voltage drops to 17.4 VDC or less (No Battery
condition). A battery with a higher voltage must be installed to turn the charger back on.
5.3.4 Telephone Lines
Pressing
C
for touchtone dialing or
D
for rotary dialing, followed by
[ENTER/STORE]
causes seizure of the pri-
mary phone line which in turn lights the red LED signifying primary phone line active. After a delay of three sec-
onds, the control panel goes off-hook to acquire a dial tone.
The control panel keypad may be used as a telephone touchpad for number dialing. Once the first digit is pressed, the
display will move the
C
or
D
character one position to the left, while placing the digit to be dialed on the farthest right
display position. Continue to press the phone numbers to be dialed. Successive depressions of the
[ENTER/
STORE]
key hangs up and picks up the phone (places the phone on or off the hook).
The secondary phone line may be tested by pressing the
E
key for touchtone dialing or the
F
key for rotary dialing
and then following the same procedure used for the primary phone line.
A handset may be temporarily connected across transformer T1 as indicated in Figure 5-1. The handset, when con-
nected across T1, may be used only as an amplifier/speaker and telephone with the control panel used for number
dialing.
TABLE 5-2:
AC Line Voltage Range
AC Line Voltage
Low Line
Normal
High Line
MS-5024UD
102 VAC
115 VAC
132 VAC
MS-5024UDE
204 VAC
220 VAC
264 VAC
TABLE 5-3:
Battery Voltage
Normal
Low Battery
No Battery
Battery Voltage:
27.6V
20.4V
<17.4V
FIGURE 5-1:
Phone Connectors and LEDs
Both Primary and Secondary Lines
