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12.2 Control Head Troubleshooting
Problem Possible Cause Solution
Head doesn’t release Solenoid malfunction
dump valve
12. GENERAL TROUBLE SHOOTING
Check the electrical connections for proper operation of
the solenoid. A click should be heard when the circuit is
closed.
Check the white wires on the solenoid for shorting. See
Fig. 16
Check that the white wires have not come loose
from the terminal block. See Fig. 16.
Check for a burned-out solenoid. measured with an
ohmeter, the solenoid should have about 5.7 ohms
resistance. A higher resistance may indicate a poor
connection or a burned-out solenoid. A lower resistance
may indicate a shorted-out solenoid coil. (12 volt model
6072 solenoid resistance should be about 1.5 ohms)
With the cover plate removed, activate the solenoid and
check for jamming of linkage.
The tail of the catch may ride up on the bearing,as shown
in Fig. 17. Activate solenoid to release.
Check that the spring link is resting on the body of the
stop bolt, as shown in Fig. 20, and not on the head of
the bolt, with the control head sitting vertically.
Check the catch for burrs at the bearing or the point.
The point can be worn by the passage of the trip line
bullet. Remove burrs with a fine file. See Fig. 18.
Jammed linkage
CHECK WIRES ON
TERMINAL BLOCK
CHECK WIRES FOR
SHORTING
Fig 16
CHECK IF TAIL OF
CATCH IS JAMMED ON
TOP OF BEARING
Fig 17
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