Enerpac SLVS-8, Instruction Sheet

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12
APPENDIX 1
TROUBLE SHOOTING GUIDE
SYMPTOM POSSIBLE CAUSE SOLUTION
Computer does not start up
No stable reading from all
sensors
No stable reading from one or a
few sensors
Reading from sensor does not
match movement of cylinders
Reading from stroke sensor
does not match reading from
pressure sensor
No operation of electro-box
No pump/motor operation
Load does not move up or down
Cylinder moving when not
selected
Error message regarding D/A or
D/O board
1. Power failure
1. Power failure
2. Emergency switch
3. Short circuit
4. Cable broken
5. Sensor defect
1. Cable broken
2. Sensor defect
1. Mismatch of circuits
1. Mismatch of circuits
1. Power failure
2. Emergency switch
1. Power failure
2. Thermal protector activated
1. Hydraulic failure
2. Valve failure
3. Relay panel defect
4. Too short steptime in special
mode
5. SELECTION ERROR
6. EMERGENCY STOP
7. Coupler not tight causing blocked
or restricted fluid movement to
cylinder
8. Defective CYLINDER CONTROL
VALVE
9. DIRECTIONAL CONTROL
VALVE will not shift
10. No signal from junction box
11. Signal present at valve plugs.
Load too heavy to lift with
advance pressure of 700 bar
(10,000psi). Retract pressure
too low to open SCK-1 CHECK
VALVES on cylinder.
1. Excessive air in the system
2. Defective SCK-1
3. Defective CYLINDER CONTROL
VALVE
4. Cylinder internal seal leakage.
5. Hydraulic hose mismatch; hose
to wrong cylinder
1. Electronics failure
1. Check cables to PC, monitor, keyboard
1. Check cables to electro-box
2. Release emergency switch
3. Check power supply in electro-box (green light). Check sensor
cables
4. Check all cables between electro-box, switchbox and PC
5. Check / replace sensors
1. Check all cables between electro-box, switchbox and PC
2. Check / replace sensors
1. Check that all sensors match the related hydraulic circuit
1. Check that all sensors match the related hydraulic circuit
1. Check power supply to electro-box.
2. Release emergency switch.
1. Check power supply to motor.
2. Check power supply to motor
1. Check if all couplers are connected properly.
2. Check power supply to valves.
3. Check ref. relays activated.
4. Increase steptime.
5. Check to see if cylinders have been selected and activated.
6. EMERGENCY STOP is depressed – twist to release.
7. Tighten coupler
8. Use manual override to lower load if necessary. Depress the
pin at the center of the solenoid coil. (Refer to photo on page
7.)
9. Check for signal from CONTROLLER. If necessary, the valve
may be shifted manually by pushing the pin at the center of
the solenoid coil.
10. Replace cables. Faulty CONTROLLER CIRCUIT. Return for
service. Blown fuse in CONTROLLER. – REPLACE.
11. Replace valve. Revisit load calculations – possibly use larger
cylinders or more cylinders. Check retract pressure and reset
to 124 – 138 bar (1800 – 2000 psi).
1. Bleed air out of system.
2. Replace
3. Replace
4. Replace seals or cylinder.
5. Correct hose routing.
1. Contact Enerpac to replace D/A or D/O board.