E27: High Motor Temperature - Graco Reactor H-VR Repair And Parts Manual

Variable ratio hydraulic proportioner

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Operation (44 pages)

Table Of Contents

Table of Contents

Enlarged version

4. To test if the failure is with the transducer or the

socket on the motor control board:

a. Reverse connections at J3 and J8 on the motor

control board.

b. Run the unit until pressure is 1000-1500 psi

(7-10.5 MPa, 70-105 bar).

c. If the problem stays on the same side as before,

replace the motor control board. If the problem

appears to move to the other side, replace the

transducer.

•

If the gauge readings are not very close:

1. Secure bleed lines in grounded waste containers, or

route back to respective component A or B supply

drum. Reduce pressure of higher component by

slightly turning PRESSURE RELIEF/SPRAY valve

for that component toward PRESSURE

RELIEF/CIRCULATION

balanced pressures.

NOTE: Turn PRESSURE RELIEF/SPRAY valve only

enough to balance pressure. If you turn it com-

pletely, all pressure will bleed off.

2. If you cannot get the pressures to balance:

a. Check for damaged pump seals or check

valves.

b. Check if you've run out of material.

c. Check for a plugged fluid path by using the feed

pump to push fluid through the gun manifold.

3. If you are able to balance pressures, try running the

unit.

4. If a fast E24 error occurs again, and the gauges

readings are not very close:

313540L

, until gauges show

Turn valve slightly

to reduce pressure

of higher

ti9877a

a. Check and clean the gun inlet screens.

b. Check and clean the gun mix chamber impinge-

ment ports and center port. See gun manual.

NOTE: Some mix chambers have counter bored

impingement ports, requiring two drill sizes to clean

completely.

Slow E24 Errors

Slow E24 errors occur gradually. The pressures are bal-

anced when you begin spraying, but slowly become

imbalanced until an E24 occurs.

NOTE: If spraying at a ratio other than 1:1, an E24

may occur. Size hoses and mix chamber appropri-

ately to avoid pressure imbalance.

Causes of Slow E24 Errors

•

one side of the gun is partially plugged.

•

the A or B proportioner pump has failed.

•

the A or B feed pump has failed.

•

the A or B feed pump pressure is set too high.

•

the hose is not heating properly.

•

kinked supply hose.

•

bottom of drum is damaged, causing blockage of

feed pump inlet.

•

drum is not vented.