Dwyer Instruments AN24 Series, Instruction Manual

Page: 15 / 21

AN24 & AN28 Annunciators Instruction Manua
15
Silence Pushbutton
Enable/Disable
1. Press and hold ACK and RESET for 3
seconds until all LEDs cycle, then release.
2. Press RESET within 3 seconds of release
while LEDs cycle.
1
3. Press RESET within 3 seconds of release
while LEDs blink.
1
4. Press the ACK pushbutton twice until LED 3
is either off or brightly on.
5. Press the RESET pushbutton to turn LED 3
off to disable the silence pushbutton or
brightly on to enable the silence pushbutton.
6. Press ACK to accept the silence pushbutton
setting.
7. Press and hold ACK for five seconds to
return to normal operation.
The green power LED will blink quickly to indicate the
unit is in the advanced programming mode. The unit
will automatically leave setup mode if no pushbutton
is pressed for 3 minutes.
Note: LED 1 and 2 are used for relay fail-safe setup
(see page 13)
1
The unit will automatically leave setup mode if steps
2 and 3 are not followed.
No Lock-In Sequence Option
ISA sequence option 4 no lock-in , may be added to
any sequence. Momentary alarms will clear without
the
ACK pushbutton. Sequences A, F1A, F2A, and
F3A will automatically clear any momentary alarm.
Sequences M, F1M, and F2M will clear all momentary
alarms when the
RESET pushbutton is used,
regardless of what channels have previously been
acknowledged with
ACK .
Selecting No Lock-In Operation
1. Press and hold ACK and RESET for 3
seconds until all LEDs cycle, then release.
2. Press RESET within 3 seconds of release
while LEDs cycle.
1
3. Press RESET within 3 seconds while LEDs
blink.
1
4. Press the ACK pushbutton three times until
LED 4 is either off or brightly on.
5. Press the RESET pushbutton to turn LED 4
off to disable the
no lock-in option or on to enable the no lock-
in option.
6. Press ACK to accept the option setting.
7. Press and hold ACK for five seconds to
return to operation.
The green power LED will blink quickly to indicate the
unit is in the advanced programming mode. The unit
will automatically leave setup mode if no pushbutton
is pressed for 3 minutes.
Note: LED 1 and 2 are used for relay fail-safe setup
(see page 13), and LED 3 is used for silence
pushbutton enable/disable (see page 14).
1
The unit will automatically leave setup mode if steps
2 and 3 are not followed.
Reset to Factory Defaults
1. Hold the ACK and RESET pushbuttons for 3
seconds until all red LEDs cycle. Release once the
LEDs begin to cycle.
2. Press and hold the RESET button for 5 seconds. If
the RESET button is not pressed within 3 seconds
of releasing ACK and RESET , the unit will return
to run mode without reset.
3. Reset the 4-position switch on the rear of the
control to the indicated default settings.
Factory
Default
Switch
Positions
Troubleshooting
If the annunciator is not working as expected, refer to
the recommendations below.
Troubleshooting Tips
Symptom Check/Action
Power LED off
Check power at power
connector
Audible alarm does not
sound when alarm state
detected
Check:
1.
Rear switch position 4
is ON.
2. No external pushbutton
contacts on the input
connector are shorted.
Power light blinks and
channel/point indicators
flash intermittently when
powered up.
Check that no external
pushbutton contacts on the
signal connector are shorted
to common.
Display sequence does not
function as expected.
Check:
1.
Verify sequence selection
as shown on page
12 .
2. Check that no external
pushbutton contacts on the
input connector are
shorted.
If the display locks up or
the unit does not respond
at all
Cycle the power to restart the
microprocessor.
Relay operation is
reversed
Check:
1.
Fail-safe settings as shown
on page
13 .
2. Wiring of relay contacts
Other symptoms not
described above
Call Technical Support for
assistance.
To reset unit to factory default settings of sequence
F2A-1, first out indication with silence and
acknowledge pushbuttons with automatic reset,
see
Reset to Factory Defaults .