Graco ProMix PD2K Repair Parts Manual page 47

Replacing the Air Flow Switch
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. Disconnect the air flow switch wires
from J6 pins 1–2 on the EFCM. See
Electrical Schematics, page 29.
4. Disconnect the air lines.
5. Remove the air flow switch (159) and attaching
hardware from the side of the control box.
6. Install a new air flow switch. Connect the wires
to J6 pins 1–2. Reconnect the air lines.
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.
Figure 35 Replacing the Air Flow Switch
Repair
47