User's Manual

Alarm Troubleshooting
94 3A1080C
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. 16
Totals Screen on page 23. I
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 ProControl 1KS is reading any fluid flow.
4. If the ProControl 1KS shows there is fluid flow and
there are no leaks from the gun or any other seals or
fittings, 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 ProControl 1KS to
reduce the fluid supply pressure. Contact your Graco
distributor for information.
Slow actuation of component A valve. See E-3: RATIO_HIGH_ALARM and E-4:
RATIO_LOW_ALARM, pages 92-93.
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 66.
Table 14. Alarm Troubleshooting