Kidde VM-1 Technical Reference Manual

Chapter 7: Service and troubleshooting
132 P/N 3101890-EN • REV 006 • ISS 21JUN18
Note: Remove the audio amplifier when you finish troubleshooting.
Common problems
Evaluation of visual and audible indications will usually serve to isolate the source of trouble. Before replacing a
VM-DACT, investigate the following common causes of a module problem.
• The module is not properly seated on the electronics chassis, or one or more connector pins are bent away
from the associated connectors
• A modular telephone plug is not connected to the appropriate line 1 or line 2 jack, is not fully seated, or is not
connected at the telephone block
• The module is configured with incorrect CMS telephone numbers
• The telephone line is faulty
If the module and telephone line are okay, check the CMS telephone number by dialing it using a standard
telephone plugged directly into the RJ-31X jack. (The jack will accommodate a standard modular phone plug.)
You should:
1. Hear a dial tone when going off-hook
2. Lose the dial tone after dialing the first digit
3. Hear the receiver ringing
4. Hear the CMS receiver go off-hook and send a handshake tone
Typical problems dialing the CMS involve missing or incorrect area codes, the need to dial 1 for long distance, or
missing line access codes (for example, dialing 9 for an outside line).
If the receiver answers, check that it is sending out the correct handshake. For Contact ID, the handshake signal
consists of two short tones of different frequency. For TAP, there should be a modem-type exchange of
handshake messages.
If the receiver sends the correct handshake and the VM-DACT transmits data but the receiver does not send an
acknowledgement, check that the receiver is compatible with the desired protocol. Typical problems involve an
incompatible format or data message.
If the handshake and acknowledge signals are audible, check that the correct account number was configured in
the VM-DACT and the code being sent was correctly programmed in the CMS computer.
Where a VM-DACT module is suspected of being faulty, try substituting a known good one that has been properly
programmed.

Kidde VM-1 Specifications

General

Brand	Kidde
Model	VM-1
Category	Fire Alarms
Language	English