18
10.4 STEP 1 — Checking the Power Pack
Indicator light is flashing or not illuminated
The toggle switch should be placed in the off position to
the power pack enclosure, open power pack enclosure lid
door, and disconnect both high voltage wires (Ionizer #8 and
Collector #7) from the power pack. The high voltage wires
should carefully be placed away from the ionizer and collector
cell power pack connectors, eliminating the high voltage wires
from contacting the power pack connectors. Place the toggle
switch in the on position and engage interlock switch; the
indicator light should be illuminated. If the indicator light is
illuminated the power pack is operational, proceed to step (2).
If the indicator light is flashing (high voltage wires #8 and #7
disconnected from the power pack), the power pack requires
replacement. If the indicator light is not illuminated proceed
with following until the problem is located and corrected.
The following steps refer to the wiring diagram within the power
pack enclosure or Figure 17.
Verify there is 120 VAC to the power pack, place the toggle
switch in the off position and remove the 120 VAC wires from
the power pack terminals 5 and 6. Connect the multimeter to
the two 120 VAC wires and place the toggle switch in the on
position and engage the interlock switch.
Confirm 120 VAC to the power pack enclosure terminals, not
the power pack terminals 5 and 6.
Verify the interlock switch operation (120 VAC) to the power pack
enclosure (measure voltage to the primary side of the interlock
switch and engage interlock switch before measuring voltage to
the secondary side. The mechanical engagement of the limit switch
should be checked refer to Section 9.5.
Place system off line and check the tightness of all wire terminal
screws and inspect for disconnected wires at the power pack
enclosure or remote electrical panel terminal blocks.
Inspect the fuses or circuit breaker to the power pack circuit.
Indicator light and circuit should be checked. Check wire
connections (#9 and #2) to the power pack, and to the indicator
light assembly. The LED requires correct wiring polarity. The LED will
not illuminate if the wiring polarity is incorrect.
The power pack has two terminals for the indicator light, identified
as #9 (+), and #2 (-). The factory wiring numbers are identical.
LED has two wires (red and black) from the assembly, wire #9 to
the red wire, wire #2 to the black wire.
VDC measurement with wires #9 and #2 disconnected from the
power pack: 7.9 to 10.0 VDC, with #9 and #2 connected 3.8 to
6.0 VDC.
Place toggle switch in the off position and connect all wires which
have been disconnected.
Parts should be replaced as required.
Figure 17 Power Pack Enclosure Wiring Diagram
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