D4220 Installation Manual - D4220-INST/09F/v2
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4.6 Alarm and Alarm LED
The LED indicates when alarm/telemetry event signals are received. The alarm relay can be reset
locally and remotely, or be controlled by the radio devices; the alarm display can only be reset
locally.
4.7 Tamper and Tamper LED
The tamper LED indicates when a system tamper has been detected; the tamper relay will remain
energised until reset or when the tamper is restored to normal. The tamper relay can be reset locally
and remotely; the tamper display can only be reset locally. A lit tamper LED without an associated
alphanumeric display indicates a unit tamper.
4.8 Batt LED
The batt LED displays a low battery condition in the system; the fault relay will remain energised until
reset or when the low battery condition is restored to normal. The fault relay can be reset locally and
remotely; the low battery display can only be reset locally. A lit bat LED without an associated
alphanumeric display indicates unit low battery.
4.9 Supervision LED
The supervision LED indicates when a supervision fault has been detected; the fault relay will remain
energised until reset or when supervision is restored to normal. The fault relay can be reset locally
or remotely; the supervision display can only be reset locally.
4.10 Display Decimal Point
Indicates that the unit is working normally and the power is on.
4.11 Display Meanings
Alphanumeric
display
Reset
Alar
m
Tam
p
er
Batt
Su
p
e
rv
is
io
n
Meaning
3-C-3-C
*
*
Alarm on channel 3, position C
2-F-T-2-F-T
* * Tamper
on
channel
2,
position
F
2-F-T- -2-F-T
*
Previous tamper on channel 2, position F
3-A-L—3-A-L
*
*
Low battery on channel 3, position A
3-A-L—3-A-L
*
Previous low battery on channel 3, position A
6-H-S—6-H-S
* *
Supervision fault on channel 6, position H (device missing for 20
minutes or more)
6-H-S—6-H-S
* * *
Supervision tamper on channel 6, position H (device missing for 2
hours or more)
6-H-S—6-H-S
*
Previous supervision fault or tamper on channel 6, position H
J
* Radio
jamming
or
interference
--
*
Unit tamper on D4220 receiver or D4221 expander
