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Section 6: Troubleshooting Guide
Powering up the LE4020/LE4020CF
– When powering up the LE4020/LE4020CF, always connect the bat-
tery (if used) first before connecting primary DC power from the control panel or transformer.
Wiring Primary
– R-1/T-1 of LE4020/LE4020CF to RING/TIP of control panel, DC power from control panel
or DC transformer to DC input, backup battery.
Wiring Backup
– Incoming line to RING/TIP on LE4020/LE4020CF, R-1/T-1 of LE4020/LE4020CF to
RING/TIP of control panel, R-1/T-1 of control panel to house phones, DC power from control panel or DC
transformer to DC input, backup battery.
Testing Communications
– When the LE4020/LE4020CF transmits a signal for the control panel, or for an
internal transmission, the BLUE light flashes once when the signal is transmitted and twice when it receives a
kiss-off.
SIM
– The SIM should be activated at least 24 hours prior to installation. The LE4020/LE4020CF will show
signal strength with an inactive SIM; However, it will display the signal strength of any available wireless net-
work. The SIM must be active to ensure the signal strength displayed is that of the wireless network provider
for which the SIM belongs to.
Panel Programming
– The control panel should be programmed to communicate Contact ID or SIA exactly
the same way it would be programmed to communicate Contact ID or SIA over the telephone line.
Blue/Green LED Status
What it means
CSQ Values
Signal Strength Status
Both Signal Strength LEDs
ON
Excellent Sig-
nal Strength
14+
l
Unit can be installed in the current mounting location.
Top LED
FLASHING
with
bottom LED
ON
Excellent Signal
Strength
11-13
l
Unit can be installed in the current mounting location.
Bottom LED
ON
Good Signal
Strength
7-10
l
Unit can be installed in the current mounting location.
Bottom LED
FLASHING
Poor Signal
Strength
5-6
(no trouble)
1-4
(with trouble)
l
Ensure the antenna cable is plugged securely into the radio con-
nector.
l
If the SIM is active, connect a battery to the unit and test vari-
ous locations for good/excellent signal strength.
l
Connect an antenna extension kit (LTE-15ANT, LTE-25ANT,
LTE-50ANT).
Both LEDs
OFF
No Signal
Strength
0
l
If the red LED is also FLASHING, refer to the RED LED
chart.
l
Verify SIM card is activated.
l
Ensure the antenna cable is plugged securely into the radio con-
nector.
l
If the SIM is active, connect a battery to the unit and test vari-
ous locations for good/excellent signal strength.
l
Connect an antenna extension kit (LTE-15ANT, LTE-25ANT,
LTE-50ANT).
Both LEDs
Flashing
ON/OFF
together
Signal Strength
is invalid
N/A
Radio is in process of network registration.
Both LEDs
Alternating
Radio Reset
Sequence
N/A
Radio is performing a Reset. If the issue persists, please verify the SIM
card is inserted correctly.
LE4020/LE4020CF Installation Manual
