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Repair
Replacing the 48 Vdc Pump Power Supply
NOTICE
To avoid damaging the circuit boards when
servicing the control box, wear Part No. 112190
grounding strap on your wrist and ground
appropriately.
To avoid electrical component damage, remove all
system power before plugging any connectors.
1. Follow the steps in Before Servicing, page 34.
2. Loosen the screws (124) and remove the
enclosure cover (117).
3. Note the position of the power supply input and
output wires. See Electrical Schematics, page 27.
Disconnect the wires from the power supply
(103).
4. Remove the screws (128) and washers (176)
holding the power supply din rail to the enclosure.
Removetheentireassembly,mountedtothe
din rail.
5. Install the new power supply assembly, using the
screws (128) and washers (176).
6. Reconnect the wires to the positions as noted
above.
NOTICE
Failure to follow the electrical schematic could
result in damage to the electrical components.
7. Reinstall the
cover (117) and tighten the screws
(124).
8. Turn on power a
t the main circuit breaker.
9. Turn on the con
trol box power switch. Press
to turn pump power on.
NOTE: The 48V green LED on each of the pump
control modules (132) will light when operating.
Figure
28 Replacing the 48 Vdc Power Supply
332709B 43