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PN: 1725-36097-001_J.doc
49
The following STATUS LEDs are displayed in combination with the
ERROR LED.
STATUS LEDs Description Action
1, 2, 3, 4, 5
MCU has not been configured for
switch interface type.
Assign a switch type to the MCU. See
Chapter 5, section Install MCUs -Set Switch
Interface Type for instructions.
1, 3
A Base Station has reported an
internal problem.
Replace the Base Station. In rare cases a
problem with the MCU can cause this error.
2, 3
No communication with one or more
Base Stations on this MCU.
Check cabling to verify that the Base
Station’s cable is plugged into and fully
seated in the Base Station port at the back
of the MCU and plugged into the Base
Station at the other end.
If the LED on the Base Station is not lit,
check for proper wiring of the 8-pin modular
plugs. See Chapter 4, section Terminate
Cable at Base Station Locations.
If the cable is over 600 feet long, verify that
the extra wire pairs have been connected
correctly.
If the Base Station LED is flashing red,
check for open or shorts on pins 1 and 2 of
the cable.
If the Base Station has been removed,
acknowledge the alarm by moving the
mode switch to REGISTER. Press the STEP
button until the LED for the removed Base
Station is blinking. Press DEL/ENTER, then
move the mode switch back to NORMAL.
1, 2, 3
Internal communication problem with
the MCU.
Replace the MCU.
4 IPC problem.
Check IPC cabling by disconnecting and
reconnecting the MCUs. Connect the Male
RJ-21 connector from the appropriate
demarcation block to the designated RJ-21
connector (A or B) on each MCU. Secure
cables using the keeper.
If the error still occurs try using a different
IPC cable. Replace MCU if the problem still
occurs.
4, 5
The switch type selected is not
supported by this MCU.
Verify that the switch type selected is
correct. If the type is incorrect, repeat the
steps to select a new switch type. See
Chapter 5 section Install MCUs -Set Switch
Interface Type.