If there is no response from any of the following tests, refer
to the main wiring diagram to locate the next connector in
line to ward the con sole and repeat the test at that con nec tor.
If there is a response at that connector, the problem may be
in the cable between the two connectors (or the con nec tors
themselves).
SPEED INPUT
Turn rotary switch to speed po si tion and dis con nect the
speed sensor (yel low tie) from the main harness. Check
for 12 volts between pins B (white) and C (black) of the
main harness speed cable (yellow tie). Using a clip lead
or other jumper wire (such as a paper clip bent in a “U”),
several times rap id ly short to geth er pins A (red) and C
(black) of the 3-pin connector
(See Illustration below).
The console should respond with some speed read ing.
FLOW INPUT
Turn rotary switch to VOLUME/MINUTE and disconnect
the flow sen sor (green tie) from the main harness. Check
for 12 volts be tween pins B (red) and C (orange) of the
main harness flow cable (green tie). Using a clip lead or
other jumper wire (pa per clip bent in a “U”), several times
rapidly short together pins A (brown) and C (orange) of
the 3-pin connector. The con sole should re spond with
some flow rate reading.
REMOTE RUN/HOLD INPUT
Grounding the grey run/hold wire should turn on the
“HOLD” icon on the console’s left display, and display
“HOLD” on the console’s right display. Disconnecting
the grey wire should remove the “HOLD” messages
(console run/hold switch in “RUN”).
FLOWMETER
Shaking the Flowmeter end to end should pro duce a “rattling”
sound (shaft end play). Blowing in the meter from either end
should spin the turbine freely. If the turbine spins freely but
the meter will not register flow with a known working sensor,
the turbine may be defective.
See Flow me ter Assembly and
clean ing on page 54 for details.
Troubleshooting
(cont)
Console Inputs
43
SERVO VALVE CONTROL SIGNAL
With the console turned ON, put the console in MANUAL
mode, place the remote Run/Hold switch in the RUN position
and turn at least one boom switch to ON. Using a voltmeter
or simple test light, check from a good frame ground to each
of the servo wires on the main harness connector. You should
get 0 volts on each wire. Holding the “+” button should cause
one wire to pulse toward 12 volts (light will pulse). Holding
the “-” button should cause the other wire to pulse toward 12
volts (light will pulse).
SERVO VALVE
The best way to test the servo valve is with a known working
console. Turn console ON, put the console in MANUAL mode,
place the remote Run/Hold in the RUN position, turn the
rotary switch to RATE and turn at least one boom switch to
ON. With the servo valve connected to the servo valve lead
on the main harness, holding the “+” button should close
the servo valve and holding the “-” button should open the
servo valve.
NOTE: Assuming you are in bypass configuration (provided
the console has passed the Servo Valve Control Signal
test). The servo valve should operate smoothly in both
directions, from fully open to fully closed.
You may also use a 12-volt battery or a 9-volt battery.
Connecting the battery to each terminal on the servo valve
should cause the servo valve to run in one direction. Reversing
the battery connections should cause the servo valve to run
the other direction. The servo valve should operate smoothly
in both directions, from fully open to fully closed.
PLUMBING
Proper plumbing is a very important factor in obtaining
optimal performance from your MT-3405D system. The chart
on the next page will help you determine what area of the
plumbing may be causing your problem. At this point, it is
assumed that your plumbing basically matches that of the
system diagram and that the servo valve and flowmeter are
known to be installed correctly and functioning properly. In
addition, make certain that you have selected and installed
the correct spray tips for the application, speed and spray rate
that you intend to maintain. Don’t forget the obvious such
as leaky fittings and hoses, pinched hoses and plugged or
worn nozzles.
If you need more detail than the chart provides,
please refer to Plumbing Guidelines on pages 45-46.
C
B
A
Three-Pin Connector
Содержание DUAL CONTROL MT-3405D
Страница 1: ...REFERENCE MANUAL DUAL CONTROL AUTOMATIC RATE CONTROLLER MT 3405D ...
Страница 47: ...Appendices 47 ...
Страница 56: ...P N 14366 56 Appendix F cont MT 3405D NH3 Specific cont MT 3405D Wiring Diagram for NH3 Channel 1 ...
Страница 82: ...82 NOTES ...
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