Alarm Troubleshooting

Table 17. Alarm Troubleshooting

E-3: RATIO HIGH ALARM

Sequential Dosing System

The mix ratio is higher than the set tolerance on the previous dose cycle.

Dynamic Dosing System

The mix ratio is higher than the set tolerance for an A to B component volume comparison.

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

Restrict gun needle travel to slow down the initial fluid

rate was probably too high.

delivery rate until fluid hoses are loaded with material.

 

 

If the alarm occurred after you were spraying for some

Adjust component A and B fluid supply regulator pres-

time, the pressures from the fluid supplies could be

sures until they are about equal. If the pressures are

unbalanced.

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

Manually operate the Dispense A and B solenoid valves

be caused by:

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

• There may be dirt or moisture in the air supply. Filter

interrupting valve actuation air.

appropriately.

 

 

• A dose valve is turned in too far.

• Refer to Table 13: Mix Manifold Valve Settings,

 

page 89, for adjustment guidelines.

 

 

• Fluid pressure is high and air pressure is low.

• Adjust air and fluid pressure. See recommended air

 

pressure above.

 

 

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Graco TI12553a, TI12552a Sequential Dosing System, Dynamic Dosing System, Refer to Mix Manifold Valve Settings

TI12553a, TI12552a specifications

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