Instruction Manual

512.14 Hydraulic Power Unit
20
Recovering From an Interlock Condition
Operation
Recovering From an Interlock Condition
Abnormal shutdowns Any one of the following conditions can cause your HPU to suddenly shut down.
You will not be able to restart your HPU until you correct the condition.
Interlock Conditions
Problem Solution
The hydraulic fluid exceeds 75ºC (160ºF). See “Reducing the Fluid
Temperature”
on page 21.
The hydraulic fluid cannot be seen in the sight glass (or it is
at a low level).
See “Adding Hydraulic Fluid”
on
page 35
.
A tripped thermal overload or blown fuse in the control
box removed power from the unit.
See “Resetting the Thermal
Overloads”
on page 24.