AMETEK/PRESTOLITE POWER AC1000 Control, Owner'S Manual

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193111 - 055
MAINTENANCE
November 17, 2020 6 - 2
1. Locate charging rate adjustment label inside charger
cabinet (same as Table 6 - 1). The factory set
charging rate is indicated on this label by circles
around terminal numbers to which YELLOW jumper
and ORANGE lead were connected.
2. Locate YELLOW jumper and ORANGE lead on each
transformer terminal block present in your unit (one
transformer for single - phase, three for three - phase).
3. Mark present location of YELLOW jumper and
ORANGE lead on charger rate adjustment label and
on Table 6 - 1 if different from that marked by factory.
4. Reconnect YELLOW jumper and ORANGE lead to
the terminals giving the desired change of charging
rate, as shown in Table 6 - 1.
CAUTION: Do not change connections
more than one step before observing
effect on charging rate. On fully charged
battery (approx. 1.270 to 1.290 specific
gravity), rate should not exceed 22% of
“ MAX AMPS ” on charger nameplate.
On fully discharged battery (approx.
1.140 specific gravity), rate should not
exceed 110% of “ MAX AMPS ”.
On three - phase chargers, all
transformer terminal blocks must
be identically connected.
Fuse Replacement
The silicon diodes in this charger are protected by a
“ fast - clearing ” type fuse.
CAUTION: The use of any other type
fuse besides the “ fast - clearing ” type
may cause damage to silicon diodes.
Silicon Diode Testing
WARNING: ELECTRICAL SHOCK
HAZARD — Before checking electrical
components, turn OFF and remove
fuses of disconnect switch (supplying
AC power to charger), disconnect
battery, and check for voltage on
capacitors. Discharge through insulated
screwdriver if there is any reading.
1. Disconnect one diode lead to isolate diode on each
transformer from electrical circuitry.
2. Use a good quality ohmmeter (preferably one having
a mid - scale value of approximately 50 ohms) to
measure resistance values.
3. Zero ohmmeter on R x 1 scale.
4. Record indicated resistance while placing either
ohmmeter lead on threaded end of diode and other
ohmmeter lead on diode lead.
5. Reverse ohmmeter leads on diode and record
indicated resistance.
Table 6 - 1 Charging Rate Adjustment Table