Info from Linear
I got the same thing when I called a few months ago so I lied and told 'em I was an installer (actually, I am in this case... I installed it!) Here's what they sent me... it helped me enormously... hopefully there'll be a gem of wisdom in here for you too
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Hi Jess,
Troubleshooting:
Blinking volume lights indicate no communication. Follow normal routine of checking all the wiring. The XDM is susceptible to ESD and will fail if connections are wiggled/connected while the unit is on. So, the first course of action is to have the installer turn the unit off BEFORE checking wiring at all. If all the wiring checks out, the first suggested remedy is to swap the controller, even if the problem is in the expansion zone alone. During our testing, the controller swap did remedy bad expansion room stations. Finally, if the problem is in the expansion zone and continues after the controller is swapped, then replace the expansion hub.
If the problem is the controller locks up, but then appears to work after several days (2+) of being off, and then works again for a period of time before locking up, then replace the controller.
XDM Troubleshooting
Here is a list of potential technical support issues for
the XDM4600 beta systems in the field.
_________________________________________________________
Problem: Four of the keypads don't work or have their red
LEDs blinking.
Issue: Check to see if the four keypads are all connected
to the Expansion Hub. The beta units in the field require
the Expansion Hub to be turned on before the Central
Controller. If the order is reversed the Central
Controller won't recognize that the Expansion Hub is
present, and won't communicate to it. This will be fixed
with the production units.
*
Problem: A keypad has its red LEDs blinking.
Issue: A keypad blinks its red LEDs to indicate that it is
not communicating with the Central Controller or Expansion
Hub. The problem is most always with the CAT-5 cabling or
the connector isn't plugged in properly.
*
Problem: The blue LED on the front of the Central
Controller or Expansion Hub blinks on an off. A clicking
noise inside the Central Controller or Expansion Hub is
heard.
Issue: This indicates that the power output to the keypads
is shorted. Check the power wiring. The power supply is
designed to handle a continuous short, so it won't be
damaged. If the short is a result of the power cables being
wired into the keypad's speaker output, then permanent
damage to the keypad has probably occurred.
*
Problem: A keypad locks up and won't accept any button
press including Vol +/-.
Issue: The beta systems have a software flaw that causes
the keypad plugged into either Port 7 or Port 8 of the
Expansion Hub to lock up after a while (several hours to
several days). Doing any of the following actions will fix
the problem for a while: do a Talk, Listen, Door Talk or
Party Mode from any other keypad, or ring the doorbell.
This will be fixed with the production units.
Problem: When two people are talking to each other one or
both keypads lock up.
Issue: When a keypad has its talk button pressed just as
another keypad is having its talk button released, one
keypad sometimes will lock up. Often this problem is fixed
when the other keypad does a talk again. This will be
fixed with the production units.
*
Problem: The keypads lock up or are extremely slow to
respond to button presses (5 to 30 seconds).
Issue: This problem occurs when the cable that goes between
the Central Controller and the Expansion Hub has come
partially loose. Check that this cable is plugged in
properly, even screwed down.
*
Problem: At full volume a keypad's audio will cut out for a
second or two. At this time the keypad is unresponsive to
any button presses.
Issue: When the keypad's audio comes back on the homeowner
only has a quick moment to press VOL- or Power to turn the
volume down before the keypad's audio cuts out again. This
is a design error, and a modification to all keypads should
have been performed to prevent this, but there is always a
chance that one keypad was missed. The keypad needs to be
replaced.
All other expected problems will involve various improperly
hooked up components.
Thank You,
TANIA VIEIRA
Applications Engineer
Linear LLC
(800) 421-1587