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Alarm Troubleshooting
84 312776F
E-5: OVERDOSE A/B DOSE TOO SHORT ALARM and
E-6: OVERDOSE B/A DOSE TOO SHORT ALARM
E-5: the A dose overshoots and, when combined with B, is too large for the mix chamber capacity.
E-6: the B dose overshoots and forces an A side dose that, when combined with B, is too large for the mix chamber
capacity.
Cause Solution
Valve seal or needle/seat are leaking. Check F
IG. 11
Totals Screen on page 23. If A and B are dosing simul-
taneously (sequential dosing only), there is a leak.
Repair the valve (see valve manual 312782).
Sampling valve is leaking. Tighten or replace valve.
Flow meter fluctuations caused by pressure pulsations. Check for pressure pulsations:
1. Close all the manifold valves.
2. Turn on the circulating pumps and all the booth
equipment (such as fans and conveyors).
3. Check if the ProMix 2KS is reading any fluid flow.
4. If the ProMix 2KS shows there is fluid flow and there
are no leaks from the gun or any other seals or fit-
tings, the flow meters are probably being affected by
pressure pulsations.
5. Close the fluid shutoff valve between the fluid supply
system and the flow meter. The flow indication
should stop.
6. If necessary, install pressure regulators or a surge
tank on the fluid inlets to the ProMix 2KS to reduce
the fluid supply pressure. Contact your Graco distrib-
utor for information.
Slow actuation of component A or B valves. See E-3: RATIO HIGH ALARM and E-4: RATIO LOW
ALARM, pages 82-83.
Running a high mix ratio and a high flow rate. It may be necessary to restrict the flow rate through the
component B dose valve by adjusting its hex nut (E).
See page 51.
Table 11. Alarm Troubleshooting