Operating instructions

31
CONSOLE INPUTS
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 11). The
console should respond with some speed read ing.
FLOW INPUT
Turn rotary switch to WEIGHT/MINUTE and disconnect
the flow sen sor (green tie) from the main harness. Check
for 12 volts be tween pins B (white) and C (black) 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 (red) and C (black) of the
3-pin connector. The con sole should re spond with some
flow rate reading.
REMOTE RUN/HOLD INPUT
Disconnect the remote run/hold sensor (or jumper cover)
from the main harness.
Check for 12 volts between pins B (white) and C (black)
of the main harness remote run/hold cable (grey tie).
Placing a clip lead or other jumper wire (such as a
paper clip bent in a “U”) between pins A (red) and C
(black) of the main harness run/hold connector (gray tie)
should turn ON the “HOLD” icon on the console display.
Removing the jumper should turn OFF the “HOLD” icon
on the console display.
CB A
Three-Pin Connector
Illustration 11
Troubleshooting (cont)
Checking Console Inputs
PWM 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, connect the positive lead from the
test light or voltmeter to Pin A on the PWM Control Valve
connector and the other lead to Pin B. Holding the “+”
button should cause the voltmeter voltage to increase from
about 4 volts to about 12 volts and the test light should go
from dim to bright.
CrustBuster
DrillMaster Quick Start Guide
346-001150 Pg 22 Revised 11/2010