Alpha Technologies LPE Enclosure - Manual (Page 29)

031-302-B0-001 Rev A
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3.0 LPE Enclosure Maintenance
Preventive Maintenance must be performed every three to six months. By establishing a routine
maintenance program and following the guidelines contained in this manual, the LPE Enclosure will
continue to provide years of trouble free operation.
Inspect the LPE Enclosure
Perform a complete inspection of the LPE Enclosure. Look for signs of rust and corrosion, paying
particular attention to the battery tray. Clean any rust or corrosion immediately.
Inspect the Mounting Brackets and Hardware
Carefully inspect the LPE Enclosure’s Mounting Bracket and mounting hardware. Look for signs of
unusual wear and loose hardware. Correct all mounting hardware failures immediately.
Check Battery Terminals and Connecting Wires
Care of the batteries is a critical step in any maintenance program. In addition to voltage checks,
visually inspect the batteries for signs of cracking, leaking, or swelling. To aid in quick identification
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 under-charging. Since batteries behave differently in the winter than in the summer, Alpha’s
battery chargers automatically compensate for changes in temperature by adjusting float and accept
charge voltages. See the power supply Operator’s and Technical Manual for complete Power Supply
Preventive Maintenance instructions.
Check each battery terminal and connection. Verify the posts are clean and the crimped connectors
are tight. Terminal connectors must be torqued to manufacturer specifications at installation. If there
is an “in-line” or battery-mounted fuse in the battery cable, check the fuse holder and fuse. Verify the
terminals are properly greased with an approved battery terminal corrosion inhibitor such as NCP-2.
Record date of maintenance in the maintenance log.
Check Battery Open Circuit Voltage
Switch the power supply’s BATTERY BREAKER to the OFF position. Disconnect the battery
connector from the Inverter Module and measure the individual voltage across each battery. The
difference between any battery in the string must not be greater than 0.3 Vdc. Defective or marginal
batteries must be replaced with an identical type of battery. Record the unloaded battery voltages in
the maintenance log.
Whenever the power supply’s BATTERY BREAKER is turned OFF or the batteries are not connected, the
power supply will not operate in Inverter Mode in the event of a utility power failure.
NOTE: