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If pH sampler or lift cycler doesn't move in manual mode or only moves one direction.
A. Does the motor run and maintain above 10V?
Check for adequate voltage good connections to the battery, and hydraulic pump. Is there 10V at the
motor while running the hydraulics?
Rev engine if necessary to maintain voltage above 10V while testing.
C. Check the LED on din connectors—this indicates signal is reaching coil to engage the valve.
LED on the clear Din connector will
light up when each hydraulic function
is enabled.
Figure 5
If the appropriate LED indicator doesn't light up when the hydraulics are engaged, there could be a
broken wire in the harness, or less than adequate voltage to engage the coil.
Cart Lift
pH probe up
Figure 6—Valve Function
Figure 4
Cart Lower
pH probe down
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