13
Trouble-shooting Guide
Problem Possible Cause Action*
* For LCD versions, also see sections 6.2 Fault Conditions, 6.3 Warning Conditions and 6.4 LCD Menus.
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 "HI PRESS" value
AUTOMODE does not
work correctly with VE33
or VE43 valves
After boot-up LCD shows
"P switch open"
LCD display shows
"FILTER"
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
Locking valve used
Valve malfunction
Cylinder return spring broken
Return flow restricted or blocked
Locking valve used
Valve malfunction
Advance or retract flow restricted
High ambient temperature
Cylinder comes to a sudden stop (i.e., strokes out)
Pressure transducer installed in pressure port other
than GA
Pressure switch circuit is open and press transducer
is installed
Loose jumper on power board
See section 5.0 Operation and 6.2 Fault Conditions for details
See Section 6.4G, Local Menu
See Section 6.4I, Diagnose Menu
See authorized service center
See Section 6.2B and 6.3A
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 5.7
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
Run motor while retracting
See authorized service center
See authorized service center
Check couplers for full engagement
Run motor while retracting
See authorized service center
Check couplers for full engagement
Install heat exchanger for hydraulic oil
Set user adjustable relief valve 200 psi above "HI PRESS" valve
to redirect excess oil flow.
Move pressure transducer to “GA” (see section 8.1). Change
microprocessor setting to “GB” (see Authorized Service
Center).
Check power board pressure switch jumper for being lose or
missing (see Fig. 11).
Remove pressure switch or pressure transducer from pump.
Check power board for lose or missing jumper at filter (see fig.
11).
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