Operating instructions

6. INSTALLATION

6.10 APM (Automatic Performance Monitor)

The APM is a field-replaceable logic upgrade that allows the XM Series power module

to self-test the inverter and batteries at pre-determined intervals and durations. It also

allows the battery charger's equalize voltage (interval and duration) to be pre-selected to

further optimize battery performance. The APM logic card plugs directly onto the main

control board at connector J2 (see illustration on previous page). Note: The Main Circuit

Module assembly must be completely removed from the power module when installing the

APM.

6.10.1 APM "Auto-Test" Interval and Duration Selection

Select self-test interval and duration settings at switch (S402) located on the APM

logic card (see previous page). Positions 1, 2, 3 or 4 determine the test intervals; posi-

tions 5, 6 or 7 determine the test duration. When a DIP switch is in the ON position, the

mode is activated. If none of the switch positions are selected, the mode reverts to its

default setting (manual test only: 34 minute test duration on 60 Hz models; 40.8 minutes

on 50 Hz models). If two switch positions are accidently selected for either interval or

duration (i.e., 6 and 7), the mode reverts to the lower of the two settings. Note: DIP switch

#8 is used only to activate the "After Outage Equalize" (AOEQ) feature.

6.10.2 APM "Auto-Equalize" Interval and Duration Selection

Equalize increases the normal battery recharge voltage by the amount selected at the

main board jumpers (Section 6.9.2). This feature is used to automatically send an equalize

voltage to the batteries at predetermined intervals and durations. It is extremely useful in

maintaining equal charges among individual battery cells.

Select Auto-Equalize interval and duration settings at switch (S401) located on the

APM logic card (see previous page). Positions 1, 2, 3 or 4 determine the equalize inter-

vals; positions 5, 6, 7 and 8 determine the equalize duration. When a DIP switch is in the

ON position, the mode is activated. If none of the switch positions are selected, the mode

reverts to its default setting (manual equalize only: 2.3 hour equalize duration on 60 Hz

models; 2.8 hour equalize duration on 50 Hz models). If two switch positions are accidently

selected for either interval or duration (i.e., 3 and 4), the mode reverts to the lower of the

two settings.

The APM logic upgrade is also equipped with an "After Outage Equalize" (AOEQ)

feature that automatically activates equalize mode after

every outage. This allows se-

verely discharged batteries to be aggressively recharged after inverter operation to prepare

for the next utility power outage. This feature is extremely useful in areas where long

outages occur on a regular basis. AOEQ is activated by placing DIP switch #8 (S402) in

the ON position. The AOEQ duration is determined by the duration setting on the equalize

switch (S401). CAUTION: Possible battery damage can occur if used incorrectly. Always

refer to the battery manufacturer's recommendations for equalize charging before selecting

AOEQ.

Note: Interval and Duration settings must be selected. DIP switches must be in the ON

position to activate the mode.