System Errors
62 3A0869H
R4
Ratio High Error
The mix ratio is higher than
the set tolerance for an A to B
component volume compari-
son.
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 properly.
• 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 unbal-
anced.
A
djust component A and B fluid supply
regulator pressures until they are about
equal.
If the pressures are already
about equal,
verify that component A
and B dose valves are operating prop-
erly.
Slow actuation of the component A or B
valves. This can be caused by:
Manually operate the Dose Valve A1
(A2, A3) and B solenoid valves 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 actu-
ation air.
• There may be dirt or moisture in the
air supply. Filter appropriately.
• Dose Valve B is turned in too far.
Dose Valve A1 (A2, A3) is open too
far.
• Refer to Valve Settings, page 38,
for adjustment guidelines.
• Fluid pressure is high and air pres-
sure is low.
• Adjust air and fluid pressure. See
recommended air pressure above.
Alarm and Description Cause Solution