Veris Technologies MSP EC and pH (1997-2008 floppy disk drive 1.02E) - Operating Instructions - Manual (Page 54)

Veris Technologies
Pub. #OM MSP03-1
54
Procedure #2: Trouble-shooting Sampler Cylinder Hydraulics
The Veris pH module uses electro-hydraulics to perform the cycling functions. If the sampling shoe
hydraulic cylinder is not functioning properly, the cause of the problem must be traced to either the
electronic or the hydraulic side. This Procedure will guide you through the steps necessary to identify
the problem when the sampler cylinder in manual mode is not moving or only moves in one direction.
An overview of this procedure is shown in Figure1. (Erratic movement or cycling problems in
automatic mode are addressed in Procedure #1.)
Figure 1. Flowchart for trouble-shooting sampler hydraulics.
1. If cylinder doesn’t move at all in manual mode, check hydraulic flow. Does main lift
cylinder function? If not, check ball valve on Power Pack (Figure 2), or tractor hydraulic lever
position. If necessary, check flow with pressure gauge.
Figure 2: Ball valve must be open for hydraulic flow
2. Inspect LED’s on External Controller circuit board. Remove metal plate covering external
controller and inspect the solenoid LED lights, as shown in Figure 3. Do not remove clear lid at
this time. The LED’s on the UP circuit should light when the sampler up-down switch is raised
and the LED’s on the down circuit should light when the manual up-down switch is lowered. If
the four LED’s on the solenoid circuit do not light in that sequence, see Procedure #1 to test
power inside External Controller.