14
Troubleshooting
Problem Possible Cause Solution
Pump will not start.
Battery pack not installed. Install battery pack.
Electrical contacts dirty or corroded. Clean contacts on the battery, pump and charger.
Battery pack discharged. Charge battery.
Battery pack shut o. Refer to battery/charger instruction sheet.
Brushes worn. Contact ENERPAC service center.
Trigger lock engaged. Undo trigger lock.
Motor damaged. Contact ENERPAC service center.
Pump clicks when trigger is depressed, but does not
start.
Electrical contacts dirty or corroded. Clean contacts on the battery, pump and charger.
Battery pack discharged. Charge battery.
Battery too cool or too warm. Get battery back to operating range (-20°C / 60°C)
Battery pack damaged or not functioning. Replace battery pack.
Pump jammed due to obstruction. Possible
internal damage to pump.
Contact ENERPAC service center.
Low fluid output.
Bypass valve malfunction. Contact ENERPAC service center.
Oil intake screens clogged with debris. Contact ENERPAC service center.
Internal damage to pump. Contact ENERPAC service center.
Cylinder will not advance or retract.
Oil level low. Add oil until reservoir is completely full.
Oil intake screen clogged. Contact ENERPAC service center.
Valve handle in wrong position. Shift valve to extend (pressure) position.
Pump slows down and stops. Battery pack discharged. Charge battery.
Cylinder advances and retracts erratically.
Air in the system. Extend and retract the cylinder until operation is smooth.
External hydraulic leak. Tighten connections. Replace damaged components.
Internal leakage in valve. Contact ENERPAC service center.
Internal damage to valve. Contact ENERPAC service center.
Internal damage to pump. Contact ENERPAC service center.
Pump pulses and/or stops during prolonged or heavy
operation.
Current draw too high.
Immediately release the trigger to prevent battery from
shutting o. Allow time for battery pack to cool before
restarting pump.
Note: If battery pack shuts o, place pack on charger to
reset.
Pump does not build pressure. User adjustable relief valve set too low.
Adjust pressure (see page 10).
Noisy pump operation.
Pump element piston sticking. Contact ENERPAC service center.
Motor or gear damaged. Contact ENERPAC service center.
(2 pages)
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