Raven SCS 460 Installation And Service Manual page 37

15) CANNOT VARY RATE IN MANUAL
OPERATION OR IN AUTO.
16) SPRAYER PRESSURE IS CORRECT
BUT RATE IS LOW.
17) TOTAL VOLUME DOES NOT REGISTER.
18) TOTAL VOLUME REGISTERS FLOW
INACCURATELY.
19) MOTORIZED CONTROL VALVE
ROTATES MORE THAN 1/4 TURN.
20) WATER INSIDE COVER OF MOTORIZED
CONTROL VALVE.
21) BOOM SOLENOID(S) WILL NOT
OPERATE.
22) TIER DRIVER NOT FUNCTIONING.
1) Check cabling to motorized Control Valve for
breaks.
2) Check connections in cabling for cleanli-
ness.
3) Verify that there is voltage at the valve con-
nector by placing MASTER switch ON;
RATE 1/RATE 2/MAN switch to MAN; and
POWER switch to ON. Manually operate
INC/DEC switch to verify voltage.
4) Verify that valve is turning. If not, replace
motorized Control Valve.
1) Verify that nozzle strainer screens or check
valves are not plugged.
2) Verify that pressure at each boom is the
same.
3) Verify all nozzles are of proper and same
orifice size. See Page 13 of Installation
Manual.
1) Check Flow Meter Cable for breaks and
shorts. See Appendix 5 for test procedure.
2) Check internals of Flow Meter; clean and
adjust. See Appendix 6 for Flow Meter
cleaning and adjustments.
3) Replace Flow Meter Transducer.
1) Verify that arrow on Flow Meter is pointing in
direction of flow. See Appendixes 6 and 7.
1) Replace motorized Control Valve.
1) Replace Isolation Flange Assembly and
coupler shaft.
2) If PC board or motor is corroded and will not
run, replace entire motorized Control Valve.
1) Check cable for wires with breaks.
2) Check connectors for cleanliness.
3) Check BOOM switch and MASTER switch
for operation.
4) Replace Boom Valves.
1) Verify cabling is properly plugged into Tier
Driver Interface box and to air valves.
2) Place console in manual tier mode and scroll
through different sets of tiers. If there is
voltage to air valves, check air valve plumb-
ing and/or nozzles.
3) Verify that there is voltage to Tier Driver
Interface box.
4) Verify that there is voltage from console on
tier driver output pins.
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