Pumps Do Not Reverse Direction - Graco Reactor 2 H-30 Repair Parts

Troubleshooting
Pumps Do Do Not Not Reverse Reverse Direction
Pumps Pumps Do Not Reverse
For proportioning pumps to reverse direction, the
proximity switches (211) must sense the switching
plate (319) to reverse the directional valve (207).
DANGER
DANGER DANGER
SEVERE ELECTRIC ELECTRIC SHOCK SHOCK
SEVERE SEVERE ELECTRIC SHOCK
This equipment can be powered by more than
240 V. Contact with this voltage will cause death
or serious injury. When accessing the electrical
enclosure while power is present:
• Do not make contact with components or wires
unless instructed to do so.
• Wear appropriate personal protective equipment.
See Electrical Schematics, page
The switching plate moves from side to side during
operation. Keep hands away from the switching
plate, while checking the functionality of the
directional valve, to prevent pinching hands.
40
Direction
Direction
1. Check the functionality of each proximity switch
102.
2. Confirm the proximity switches (211), switch
3. Check distance between the proximity switches
(211).
a. Remove the front cover.
b. With the motor powered off, confirm that the
indicating lights on the body of each proximity
switch (211) turns on when a metallic item,
such as the shaft of a screwdriver, is placed
on the face of each switch.
c. If the indicating lights turn on, the proximity
switches, its wiring, and the HCM are likely
operating correctly; proceed to step 2. If the
indicating lights do not turn on, proceed to
step 6.
bracket (209), and switching plate (319) are
firmly mounted and not damaged.
(211) and the switching plate (319).
a. Park the pump.
b. Confirm that the proximity switch (211)
nearest the A-side of the pump is backed out
0.5 to 1.5 turns from being in contact with the
switching plate (319).
c. Disconnect the cable from the proximity
switch (211) nearest the B-side of the pump.
Operate the pump until the switching plate
(319) is located above the B-side proximity
switch, then turn off the motor/pump.
d. Confirm that the proximity switch (211)
nearest the B-side of the pump is backed out
0.5 to 1.5 turns from being in contact with the
switching plate (319).
e. Reconnect the cable to the B-side proximity
switch (219).
334946H