- Check that an alarm is actually present, as indicated by the LEDs on the
front panel. In its default condition, the B1290 expects to see a closure to
ground at the alarm input. If your alarm inputs are normally closed con-
tacts which open on an alarm condition, this parameter may be adjusted us-
ing Program Code 5. The debounce can also be set in this section. This pa-
rameter may be set to delay reporting an alarm until it has been present for
a certain number of seconds, in which case it will not recognize a momen-
tary closure.
Problem: The B1290 waits a long time before announcing the alarm
over the radio.
- The B1290 will wait for one minute when the COS input is busy and then
transmit anyway. This is done to ensure that an open squelch on the radio
does not disable the reporting operation. Check the Squelch Polarity set-
ting to make sure that it matches the operation of the radio’s COS output. If
the COS input to the B1290 is left open the Squelch Polarity should be set to
0 using Program Code 6.
- Check the alarm delay (debounce) parameter using Program Code 5. If a
delay has been programmed, the B1290 will wait until the alarm has been
present for that interval before reporting it.
- Check the directory programming to make sure that there is not an
unwanted Wait command present.
Problem: The B1290 continues dialing even after the alarms have
been acknowledged.
- The most common cause of this problem is fleeting alarms. They occur
when the device reporting an alarm to the B1290 gives a series of pulses on
the contacts instead of a clean closure. If the problem cannot be corrected in
the field wiring, one option is to “debounce” the alarms using the B1290
alarm delay parameter using Program Code 5. When this value is set, con-
tacts must be closed for a specific period of time before they are recognized
as alarms.
- Check if any new alarms are announced when the B1290 continues to dial
after it has been acknowledged. Sometimes alarms at a remote site are re-
lated, occurring in a chain reaction from a single cause. The B1290 will start
dialing when it receives the first alarm, but if another alarm occurs in the
meantime, it will keep dialing until all the alarms are acknowledged.
Problem: The B1290 won’t answer the phone.
- Check that the phone line is plugged into the PHONE jack and not the
PGM jack.
- Check that the phone line is using the inner red/green pair, and not the
outer black/yellow pair (normally reserved for line 2).
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Troubleshooting