
8 6-051344 X2
212iLM Keypad Installation & Programming
Troubleshooting
Issue Explanation Solution
LED’s cycling slowly from right to
left.
The 212iLM Mullion is designed to
monitor for low voltage. Once low
voltage is detected, the keypad
turns off the backlighting to ensure
operation of the keypad until the
problem can be attended to.
Verify the power supply output
voltage. If it is below the voltage
threshold of 7.5 Volts AC or 9 Volts
DC, you must increase the voltage
to between 12-24 Volts.
LED’s cycling rapidly from left to
right and the keypad has lost all
operation.
The 212iLM Mullion is designed
to monitor for over voltage. This
is a very “severe” condition and
significantly affects the keypad’s
operation. Once the over voltage is
detected, the keypad shuts down all
operation and does not operate until
the voltage is lowered.
Verify the power supply output
voltage. If it is over the voltage
threshold of 35 Volts, you must
lower the voltage below 29 Volts.
Can’t access programming mode
using the master code.
The code you are entering is likely
not the master code.
Perform the program mode
loopback in the following section to
enter program mode and reprogram
the master code.
No LED’s are lit on the keypad. Power is not reaching the keypad. First verify there is voltage at
the keypad. If not, verify there is
voltage at the power supply. If
there is voltage, verify continuity
on the wires out to the keypad.
Otherwise contact the power supply
manufacturer or Nortek Security &
Control if there is a problem with the
keypad. You also may try power the
keypad with a 12V battery to verify
operation.
DEALERS/INSTALLERS ONLY! End users must contact the dealer/installer for support. If the keypad still does not
work after troubleshooting, please call the Technical Services department at 1-800-421-1587.
Testing the Keypad
After installing the keypad, it is recommended that you perform the keypad self-test once a year, to ensure that the keypad
is working properly.
●To perform the self-test, with the unit powered up, press the following keys on the keypad: 7890 # 123456 ✱
●If all 12 key presses are accepted, the keypad enters self-test mode.
●The LEDs alternate three times followed by the sounder beeping three times.