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Problem
Pump will not start
Pendant does not function
Motor stops under load
Electric valve will not operate
Pump fails to build pressure or
less than full pressure
Pump builds full pressure, but
load does not move
Cylinder drifts back on its own
Single-acting cylinder will
not return
Double-acting cylinder will not
return
Pump runs hot
Pump pressure goes above
"PRESR A" or "PRESR B" value
Dwell Mode does not work
correctly
After boot-up, LCD display
shows "P switch open"
LCD display shows "FILTER"
* As required during troubleshooting, refer to sections 6.2 LCD Menus, 6.3 Fault Conditions and 6.4 Warning Conditions.
Table 1, Troubleshooting Guide
Possible Cause
Fault condition
Pump in local mode
Pendant damage
Low voltage
No power or wrong voltage
Solenoid cable disconnected or damaged
Valve out of adjustment
Low oil level
Relief valve set too low
External system leak
Internal leak in pump
Internal leak in valve
Internal leak in system component
Load greater than cylinder capacity at full pressure
Flow to cylinder blocked
External system leak
Internal leak in a system component
Non-load holding valve used
No load on a "load return" cylinder
Return flow restricted or blocked
Valve malfunction
Cylinder return spring broken
Return flow restricted or blocked
Valve malfunction
Advance or retract flow restricted
High ambient temperature
Cylinder comes to a sudden stop (i.e., strokes out) Set user adjustable relief valve 200 psi above "PRESR A"
Pressure transducer installed in pressure port other
than "GP"
Pressure switch circuit is open
Loose jumper on power board
See Section 5.0, Operation and 6.3, Fault Conditions for
details
See Section 6.2L, Local Menu
See Section 6.2N, Diagnose Menu
See authorized service center
See Sections 6.3B and 6.4A
Turn off other electric loads
Use heavier gauge extension cord
Connect to correct power source per pump name plate
Connect, repair, or replace cable
See authorized service center
Add oil per Section 4.4
Adjust per Section 5.4
Inspect and repair or replace
See authorized service center
See authorized service center
See authorized service center
Reduce load or add cylinder capacity
Check hydraulic couplers for full engagement
Inspect all hydraulic connections and replace or repair
See authorized service center
See authorized service center
Add load
Check couplers for full engagement
See authorized service center
See authorized service center
Check couplers for full engagement
See authorized service center
Check couplers for full engagement
Install heat exchanger for hydraulic oil
or "PRESR B" value to redirect excess oil flow
Move pressure transducer to "GP"
See authorized service center.
See authorized service center.
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Action*
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