Alpha Technologies Micro Secure UPS - Manual (Page 68)

017-220-J0 Rev B
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7.4 Preventative Maintenance
Perform preventative maintenance on the Alpha Micro Secure module every 6 to 12 months. For mission critical
applications such as backup traffic intersections, more frequent maintenance should be done. Proper implemen-
tation of the following procedure will insure that your system continues to provide reliable backup power in the
event of a utility power failure.
7.4.1 Tools and Materials Required
• Wrench set.
• Labels and marker to number batteries.
• Conductance meter for optional conductance test.
7.4.2 Procedure
1. Inspect the Alpha Micro Secure and wiring for any physical damage. Repair or replace as required.
2. Verify that all connections are securely fastened. Tighten if necessary.
3. Inspect the batteries for cracks or swelling. Replace all four batteries if any of the batteries are cracked or
swollen. Replace only a faulty battery if an Alphaguard battery balancer is installed.
4. Inspect the battery terminals for corrosions. Clean and apply a corrosion prevention compound such as
NOCO Company NCP-2 or Sanchem Inc. NO-OX-ID if required.
5. Re-tighten the battery terminal bolts on Insert Terminal batteries. Re-torque the battery terminal bolts on Flag
Terminal batteries to the manufacturers specifications on if required.
6. Label the batteries #1, #2, #3 and #4. The battery negative cable from the Alpha Micro Secure is connected
to Battery #1, and the battery positive cable from the Alpha Micro Secure is connected to Battery #4.
7. Verify that the battery temperature probe is securely taped to the side of either battery #2 or #3.
7.4.3 Operational Test
1. Activate the Alpha Micro Secure self-test function.
2. After passing the self-test, disconnect the AC input to the Alpha Micro Secure to trigger the unit into the
backup (Inverter) mode.
3. Let the Alpha Micro Secure operate in the backup mode for approximately 10 minutes.
4. Measure the individual battery voltages while the Alpha Micro Secure is operating in the backup mode.
There should be no more than 0.6 volts difference between the highest battery voltage and the lowest battery
voltage.
CAUTION!
A battery that measures 2 V lower than the other three batteries in the string probably
has a shorted cell. Replace all four batteries.
Three batteries in the string measuring the same voltage and one battery measuring
several volts higher indicates an open cell in the battery with the higher reading. Re-
place all four batteries.
5. Verify that there is no Low Battery Alarm.
6. Reconnect the AC input.