Graco ProMix PD2K Repair Parts page 55

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
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
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.
Remove the entire assembly, mounted to the
din rail.
5. Install the new power supply assembly, using the
screws (128) and washers (176).
6. Reconnect the wires to the power supply.
Failure to follow the electrical schematic could
result in damage to the electrical components.
7. Reinstall the cover (117) and tighten the screws
(124).
332709D
Before Servicing, page
NOTICE
8. Turn on power at the main circuit breaker.
9. Turn on the control box power switch. Press
NOTE: The 48V green LED on each of the pump
control modules (132) will light when operating.
48.
34.
Figure 35 Replacing the 48 Vdc Power Supply
to turn pump power on.
Repair
55