Down Stream Valve Leak Test - Graco XM 24W626 Operation Manual

System Verification
Enter the weight (in grams) of each sample in the A and
B input boxes. The system will calculate the ratio and
display a check in the box if it is within tolerance. The
result of the test is also entered in the USB log.
NOTE: If the test passes, the "X" will disappear in the
top right corner and Spray Mode can be used. The sys-
tem is now calibrated for use.

Down Stream Valve Leak Test

This test confirms or troubleshoots leaks in components
located down stream of the dosing valves. Use this test
to detect closed or worn valves, and to detect leaks in
circulation valves installed at a remote mix manifold.
1. Close both mix manifold valves downstream of the
dosing valves.
2. Close recirculation valves (AC, AD).
3. Enter Test mode in the run (fluid control) screen.
See Test Screens on page 79. Select
run down stream valve leak test.
4. Select Press
.
(AA, AB) are open by verifying blue LEDs are illumi-
nated for both dosing valves.
5. If test is successful, both metering pumps will stall
against the downstream valves when the dosing
valves (AA, AB) are open. If any movement is
52
to
. Ensure dosing valves
detected in the metering pumps after stalling, an
alarm is issued indicating which side has a leak.
3A2776H