Alpha Technologies VMX Series - Manual (Page 49)

49 017-940-B0-001, Rev. A
6.0 VMX Power Supply Maintenance
Maintenance must be performed every three to six months. By establishing a routine maintenance
program, and following the guidelines contained in this manual, the VMX Power Supply will provide
years of trouble-free operation.
Care of the batteries is the fi rst step in any power supply maintenance program. In addition to
voltage checks, visually inspect the batteries for signs of cracking, leaking, or swelling. To aid in
quick identifi cation and tracking of voltages in the maintenance log, number the batteries inside the
enclosure using labels or masking tape, etc. Batteries are temperature sensitive and susceptible to
overcharging and undercharging. Since batteries behave differently in the winter than in the summer,
Alpha’s battery chargers automatically compensate for changes in temperature by adjusting fl oat and
accept charge voltages.
6.1 Check Battery Open Circuit Voltage
Prior to testing, record the battery manufacturer, date code, lot number, and power supply’s
model number and serial Number.
Inspect all battery posts, verify that all connections are clean and tight. Reapply corrosion
inhibitor.
Disconnect the AlphaGuard CMT (if used) and switch the front panel battery breaker of the
VMX Power Supply Inverter to OFF. Disconnect the battery connector from the inverter and
measure the individual voltage across each battery. The difference between any battery in the
string should not be greater than 0.3Vdc. Defective or marginal batteries should be replaced
with an identical type of battery. Record the unloaded battery voltages in the maintenance
log.
6.2 System Information
Observe and record the following system information from the Normal Operation and
Additional Information menus in the maintenance log. See Section 6.9.
CAUTION!
• The VMX Power Supply must be serviced by qualifi ed personnel.
• Alpha Technologies is not responsible for battery damage due to improper charger voltage settings.
Consult the battery manufacturer for correct charger voltage requirements.
• When removing batteries, ALWAYS switch the battery breaker off before unplugging the battery connector.
• Always wear safety glasses when working with batteries.
Operation Normal
Input Voltage
Output Voltage
Output Current (1-4)
Standby Events
Battery Voltage
Charger Mode
Total Standby Time
Operation Mode
Additional Information
Battery Temperature
Output Voltage
Input Frequency
Output Watts
Output VA
Percent Load