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The operation of the S
S
UHP system during loading with a
PILL
TOP
hydraulic pump is as follows: When the system is powered on and
the tank is empty, the green EMPTY/RE-ARM indicator is on, the
orange POWER indicator is on, the green PUMP ON indicator is
on, the horn is off, and the pump is allowed to run. If the hydraulic
pump in engaged to load when there is a closed valve on the
discharge side of the pump, this will be detected by a pressure
sensor and will cause the red VALVE ERROR indicator to go on and
the PUMP ON indicator to go off, resulting in an immediate pump
shutdown. This prevents equipment damage, blown off hoses,
spills, and possible operator injury. The horn is not activated for this
condition, and this shutdown cannot be bypassed so the operator
must correct the condition before loading can occur. If loading
is able to proceed normally, the EMPTY/RE-ARM indicator will go
off as the fluid level starts to rise. When the horn alarm point is
reached, the orange HORN ALARM indicator turns on, the PUMP
ON indicator turns off, the horn will start to sound, and the pump
will shut down. Pressing the BYPASS button on the right hand side
of the controller will turn on the orange BYPASS indicator, turn on
the PUMP ON indicator, turn off the horn and allow the pump to
restart. This allows the operator to clean out hoses or to continue
to load to maximize the load volume. The bypass will not work
below the horn alarm point. The HORN ALARM indicator stays
on even when bypassed to remind the operator that the alarm
condition still exists.
If loading is continued to the point that the SHUT DOWN alarm
point is reached, then the red SHUT DOWN indicator turns on,
the PUMP ON indicator turns off, and the pump will shut down.
There is no bypass button for this condition so it is not possible
to load higher than this alarm point due to the risk of an overfill
spill. However, it is possible to unload with the hydraulic pump by
pressing and holding the over-ride button. This allows the pump
to operate as long as the tank level does not rise any further,
so it can only be used to pump off product. While the over-ride
button is pressed, the orange indicator will turn on. If the over-
ride indicator does not turn on, then the tank level is too high for
the over-ride to work. As soon as the tank level drops below the
shut down point, the over-ride button can be released.
If there is a valve closed on the discharge side of the pump for
the unloading operation then the VALVE ERROR indicator will go
on and the PUMP ON indicator will go off, causing an immediate
pump shutdown just like during loading.
Once loading is
completed and the system is powered off, the horn is always off.
This prevents sloshing or other disturbances from sounding the
horn during driving.
815UHP/H Manual
Page 5
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