Specifications

COM2 Communications Controller ELAN HOME SYSTEMS
4-6 © ELAN Home Systems 2007 • All rights reserved.
Table 4-5 COM2 Volume Control Troubleshooting Procedures
Symptom
Possible
Cause/s What an authorized installer can do
Volume con-
trols do not
work when
page or Door
Chime is
sent.
VCO- and
VCO+ may be
reverse wired,
or power + and
- may be
reversed.
1. Confirm symptom and homeowner’s findings regarding.
2. Verify that VCO+ and VCO-polarity is wired properly.
3. Verify power supply polarity is wired properly.
4. Enter a page or press a Door Station doorbell to verify
problem corrected.
If problem still exists, call ELAN Technical Support at 1-800-
622-ELAN.
Cannot hear
Page or Door
Chime when
volume con-
trols are
turned down.
1. Page &
Doorbell Over-
ride feature is
not working.
2. VCO- and
VCO+ may be
reverse wired,
or a power
supply + and -
may be
reversed.
1. Confirm symptom.
2. Verify that VCO+ and VCO- connections for the overrides
are connected properly and polarity is maintained to the VCO
removable connectors on the back of the COM2.
3a. Rotary Volume Controls - Ensure that the Override Vol-
ume Jumpers are properly set for rotary volume controls.
3b.
Electronic Volume Controls - Verify that the Override Vol-
ume settings are properly set.
4. Verify that the power supply (internal or external) is con-
nected properly and is providing the voltage and current nec-
essary to power the volume controls. Contact ELAN Technical
Support from the job site at 1-800-622-ELAN, if voltage is
present.
Table 4-6 COM2 Hum Troubleshooting Procedure
Symptom
Possible
Cause/s
What an authorized installer can do
Noise or hum
in phone ear-
piece.
Ground Loop 1. Remove any fax machines, answering machines, DSS/
Cable Boxes or any other equipment connected to the phone
system.
2. Bypass the COM2 RJ-11 connection with an RJ-ll jumper or
power off the COM2.
If the problem clears during the above checks, a ground loop
exists between the power circuit for the COM2 and the phone
system or connected equipment. Have a licensed electrician
check and repair grounding for the homes electrical system.