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Installation and Operations Guide

VLX/ACM-VLX/EXP/AXM operation and maintenance

VLX/VLX-Platinum coin-cell battery replacement

The onboard lithium coin-cell battery provides power for the real-time clock and

for battery-backed SRAM when 24 VAC power is unavailable.

For best results, replace the coin-cell battery every three years. Standby battery

life is approximately 10 years, with 1.5 years of cumulative backup capability.

Battery life varies depending on application.

CAUTION Always back up VLX/VLX-Platinum data to the Compass operator

workstation before replacing the coin-cell battery. It is recommended that you

replace the battery while 24 VAC power is applied to the unit. Otherwise, the

VLX/VLX-Platinum loses configuration data, and you must restore data

manually from an operator workstation.

 To re plac e the VLX co in-c e ll batte ry

1. Raise the left flap of the VLX and note the battery location.

2. Without removing power, carefully raise the battery clip about 1/8" with

a small screwdriver.

3. Dispose of the old battery in an approved method.

4. Paying attention to polarity, insert the replacement battery into the

battery clip.

5. Close the flap.

Resetting the VLX and clearing data

Resetting the VLX, clearing data, and clearing the ROC file may be necessary

when troubleshooting the VLX. These steps are usually performed in ascending

order. If the first does not fix the problem, try the next.

1. Reset the VLX.

2. Clear DDC and objects, and then reload them.

3. Clear ROC and reload ROC and DDC.

IMPORTANT Procedures in this topic require operational system boot code.

These procedures are not effective if the SYS LED indicates a problem. In this

case, contact your Alerton dealer.

Resetting the VLX

The VLX has a Reset button, which resets CPU power without physically

removing and replacing power connections. When instructions or procedures

call for you to reset the VLX, use the Reset button.

Alerton part number BT-3.0V-COIN2

Type 3.0V lithium coin cell. Duracell DL2450 or

equivalent.

Honeywell ALERTON ACM-AXM User Manual

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