System Errors
Alarm and Description | Cause | Solution | |
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R4 | There is too little restriction in the system. | • Check that the system is fully | |
Ratio High Error |
| loaded with material. | |
The mix ratio is higher than |
| • Check that the supply pump’s | |
the set tolerance for an A to B |
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| cycle rate is set properly. | ||
component volume compari- |
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son. |
| • Check that the spray tip/nozzle is | |
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| properly sized for the flow and | |
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| application, and that it is not | |
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| worn. | |
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| • Check that the fluid regulator is | |
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| set properly. | |
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| If the alarm occurs during start up, after | Restrict gun needle travel to slow | |
| purging, the flow rate was probably too | down the initial fluid delivery rate until | |
| high. | fluid hoses are loaded with material. | |
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| If the alarm occurred after you were spray- | Adjust component A and B fluid sup- | |
| ing for some time, the pressures from the | ply regulator pressures until they are | |
| fluid supplies could be unbalanced. | about equal. If the pressures are | |
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| already about equal, verify that com- | |
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| ponent A and B dose valves are oper- | |
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| ating properly. | |
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| Slow actuation of the component A or B | Manually operate the Dose Valve A | |
| valves. This can be caused by: | and B solenoid valves to check oper- | |
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| ation. | |
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| • Air pressure to the valve actuators is | • Increase air pressure. Air pres- | |
| too low. | sure must be | |
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| psi is recommended. | |
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| • Something is restricting the solenoid or | • There may be dirt or moisture in | |
| tubing and interrupting valve actuation | the air supply. Filter appropri- | |
| air. | ately. | |
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| • Dose Valve B is turned in too far. | • Refer to Valve Settings, page | |
| Dose Valve A is open too far. | 35, for adjustment guidelines. | |
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| • Fluid pressure is high and air pressure | • Adjust air and fluid pressure. See | |
| is low. | recommended air pressure | |
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| above. | |
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QDA1 | Valve seal or needle/seat are leaking. | Repair the valve. | |
Overdose A |
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Slow actuation of component A or B valves. | See Ratio Low Error and Ratio High | ||
The A dose has overshot and, |
| Error, pages | |
when combined with B, is too |
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Running a high mix ratio and a high flow | It may be necessary to restrict the | ||
large for the mix manifold | |||
rate. | flow rate through the component B | ||
capacity. | |||
| dose valve by adjusting its hex nut. | ||
QDB1 |
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Overdose B |
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The B dose has overshot, |
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forcing an A dose that, when |
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combined with B, is too large |
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for the mix manifold capacity. |
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3A0868G | 57 |