Raven SCS660M Installation & Service Manual page 53

Issue
Cannot vary the RATE in automatic or
manual operation.
TOTAL VOLUME does not register.
Manual No. 016-0159-845
Preventative Maintenance and Troubleshooting
Corrective Action
Check the cabling to the motorized control valve for breaks in
1.
the line.
Verify the cable connections are clean.
2.
Verify that there is voltage to the valve connector.
3.
Turn the Master switch ON.
a.
Switch the RATE 1/RATE 2/MAN switch to MAN.
b.
Turn the POWER switch ON.
c.
Manually operate the INC/DEC switch to verify voltage.
d.
Verify that the valve is turning. If not, replace the motorized
4.
control valve.
Check the metering shaft encoder cable for breaks and shorts.
1.
Refer to the Testing Flow Meter/Encoder Cables section on
page 43.
Replace the metering shaft encoder.
2.
47