Graco ProMix PD2K Repair Parts Manual page 43

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 36.
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 29.
Disconnect the wires from the power supply
(103).
4. Remove the screws (128) 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).
6. Reconnect the wires to the positions as noted
above.
7. Reinstall the cover (117) and tighten the screws
(124).
3A2800B
8. Turn on power at the main circuit breaker.
9. Turn on the control 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 31 Replacing the 48 Vdc Power Supply
Repair
43