Alarm Troubleshooting
312776K
85
E-4: RATIO LOW ALARM
Sequential Dosing System
The mix ratio is lower than the set tolerance on the previous dose cycle.
Dynamic Dosing System
The mix ratio is lower than the set tolerance for an A to B component volume comparison.
Cause
Solution
There is too much 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 clogged.
•
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.
A
djust component A and B fluid supply regulator pres-
sures until they are about equal.
If the pressures are
already about equal,
verify that component A and B dose
valves are operating properly.
Slow actuation of the component A or B valves. This can
be caused by:
Manually operate the Dispense A and B solenoid valves
as instructed in the ProMix 2KS 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 7: Mix Manifold Valve Settings
page 55, for adjustment guidelines.
•
Fluid pressure is high and air pressure is low.
•
Adjust air and fluid pressure. See recommended air
pressure above.
Table 11. Alarm Troubleshooting
