Raven SCS660M, Installation & Service Manual

Page: 53 / 60

Manual No. 016-0159-845 47
Preventative Maintenance and Troubleshooting
7
Cannot vary the RATE in automatic or
manual operation.
1.
Check the cabling to the motorized control valve for breaks in
the line.
2.
Verify the cable connections are clean.
3.
Verify that there is voltage to the valve connector.
a.
Turn the Master switch ON.
b.
Switch the RATE 1/RATE 2/MAN switch to MAN.
c.
Turn the POWER switch ON.
d.
Manually operate the INC/DEC switch to verify voltage.
4.
Verify that the valve is turning. If not, replace the motorized
control valve.
TOTAL VOLUME does not register.
1.
Check the metering shaft encoder cable for breaks and shorts.
Refer to the
Testing Flow Meter/Encoder Cables section on
page 43.
2.
Replace the metering shaft encoder.
Issue Corrective Action