Specifications

IV MAINTENANCE AND TROUBLESHOOTING

In the unlikely event that trouble is suspected with the system, it must be promptly

disconnected from the telephone network, and referred to Microtel or its authorized

service representatives. A service manual detailing troubleshooting procedures is

available to qualified personnel.

Periodically inspect the system internally for any evidence of moisture, blown fuses, or

battery failure as instructed herein.

A. MAINTENANCE

1. Battery Care

Battery life is dependant upon a number of factors, and will vary depending on the

number of outages, and the age of the battery. A new battery will take no longer than

24 hours to gain a full charge, capable of powering the system through any power

outage up to four hours in length. It should be noted that the LOW BATTERY indicator

is only valid when the 120 vac power is on. If the LOW BATTERY indicator stays on

for more than eight hours, the battery is in need of replacement.

2. Battery Replacement

The battery is installed at the top of the system, in the battery tray provided as part of

the interior chassis assembly.

It is necessary to remove power from the system by throwing the supply circuit

breaker or removing the power transformer from the power outlet before replacing the

battery.

Refer to Section I.C - Battery Installation for instructions on installing a new battery.

3. Volume Adjustment

The volume of the system's speech messages delivered to the telephone network is

fixed. The volume of the speech heard through the system speaker is, however,

adjustable by varying the setting of potentiometer R21, located on the main circuit card

in the unit.

4. Acknowledge Tone Adjustment

R33, located on the system's main board, is the adjustment for the frequency detected

during the acknowledgement of an alarm call. By activating SEQUENCE 55 (see

previous section) the system will deliver a continuous acknowledge tone (* key) to

itself, during which the potentiometer R33 may be set. Center the adjustment by

varying the setting until the Acknowledge LED on the front panel turns on. There is

some amount of hysteresis associated with this detection so the centering of the

component must take into account approaches from each direction. The continuous

tone used for adjustment may be halted by depressing the HALT key after the

adjustment is completed.