E27: High Motor Temperature - Graco Reactor H-25 Series Repair And Parts Manual

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 completely, 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:
a. Check and clean the gun inlet screens.
b. Check and clean the gun mix chamber
impingement ports and center port. See gun
manual.
NOTE: Some mix chambers have counter bored
impingement ports, requiring two drill sizes to clean
completely.
312063Z
, until gauges show
Turn valve slightly
1
to reduce pressure
of higher
1
ti9877a
Slow E24 Errors
Slow E24 errors occur gradually. The pressures are
balanced when you begin spraying, but slowly become
imbalanced until an E24 occurs.
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 A or B proportioner pump inlet screen is
plugged.
• the hose is not heating properly.
• kinked supply hose.
• bottom of drum is damaged, causing blockage of
feed pump inlet.
• drum is not vented.

E27: High motor temperature

Causes of E27 Errors:
• Motor temperature is too high. Reduce pressure,
gun tip size, or move Reactor to a cooler location.
Allow 1 hour for cooling.
• Make sure there is no obstruction to fan airflow.
Ensure that the motor/fan shroud is installed.
• Check that the motor overtemperature wire
assembly is plugged into J9 on the motor control
board, F . 5, page 32.
IG
• If the preceding checks do not correct the problem,
perform the following tests:
1. Turn main power OFF
2. Allow motor to cool completely. Check continuity
between pins 1 and 2 on connector J9 on the motor
control board, Motor Control Board, page 31. If the
resistance is infinity, the motor thermal switch or the
wire harness is bad. Check wiring, measure thermal
switch continuity at motor, and replace failed part.
3. Unplug motor from J9 on motor control board. Install
jumper across pins 1 and 2 on board. If error still
occurs, replace motor control board.
4. If the E27 error is still occurring, the problem is with
the motor control board.
Motor Control Diagnostic Codes
.
13