Veris Technologies MSP EC and pH (1997-2008 CF card drive 1.10M) - Operating Instructions - Manual (Page 52)

Veris Technologies
Pub. #OM MSP03-1
52
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.