E-4: Ratio Low Alarm

To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.

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.

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 properly.
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

Adjust 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 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 recommended.

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: Mix Manifold Valve Settings, in manual, for adjustment guidelines.

Fluid pressure is high and air pressure is low

Adjust air and fluid pressure. See recommended air pressure above.