Alpha Technologies Micro, Micro XL, Micro XL3 UPS - Manual (Page 87)

85 017-237-B0 Rev A
7.3 Preventative Maintenance
Perform preventative maintenance on the Alpha Micro module every 6 to 12 months. For mission critical applica-
tions such as backup traffic intersections, more frequent maintenance should be done. Proper implementation of
the following procedure will insure that your system continues to provide reliable backup power in the event of a
utility power failure.
7.3.1 Tools and Materials Required
• Wrench set.
• Labels and marker to number batteries.
• Conductance meter for optional conductance test.
7.3.2 Procedure
1. Inspect the Alpha Micro 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 is connected to
Battery #1, and the battery positive cable from the Alpha Micro is connected to Battery #4.
7. Verify that the battery temperature probe is securely taped to the side of either battery #2 or #3.
7.3.3 Operational Test
1. Activate the Alpha Micro self-test function.
2. After passing the self-test, disconnect the AC input to the Alpha Micro to trigger the unit into the backup
(Inverter) mode.
3. Let the Alpha Micro operate in the backup mode for approximately 10 minutes.
4. Measure the individual battery voltages while the Alpha Micro 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.