User's Manual

Alarm Troubleshooting
313882C 79
E-3: RATIO_HIGH_ALARM
Sequential Dosing System
The mix ratio is higher than the set tolerance on the previous dose cycle.
Cause Solution
There is too little restriction in the system. • Check that the system is fully loaded with material.
• Check that the supply pump’s cycle rate is set prop-
erly.
• Check that the spray tip/nozzle is properly sized for
the flow and application, and that it is not worn.
• Check that the fluid regulator is set properly.
If the alarm occurs during start up, after purging, the flow
rate was probably too high.
Restrict gun needle travel to slow down the initial fluid
delivery rate until fluid hoses are loaded with material.
If the alarm occurred after you were spraying for some
time, the pressures from the fluid supplies could be
unbalanced.
Adjust component A, B, and C fluid supply regulator
pressures until they are about equal. If the pressures are
already about equal, verify that component A, B, and C
dose valves are operating properly.
Slow actuation of the component A, B, or C valves. This
can be caused by:
Manually operate the Dispense A, B, and C solenoid
valves as instructed in the ProMix 3KS Repair-Parts
manual to check operation.
• Air pressure to the valve actuators is too low. • Increase air pressure. Air pressure must be 75-120
psi (0.52-0.84 MPa, 5.2-8.4 bar); 120 psi is recom-
mended.
• Something is restricting the solenoid or tubing and
interrupting valve actuation air.
• There may be dirt or moisture in the air supply. Filter
appropriately.
• A dose valve is turned in too far. • Refer to Table 6: Mix Manifold Valve Settings,
page 50, for adjustment guidelines.
• Fluid pressure is high and air pressure is low. • Adjust air and fluid pressure. See recommended air
pressure above.
Table 10. Alarm Troubleshooting