Enerpac Pow'r-Riser PR-Serie Bedienungsanleitung Seite 12

Possible Cause
Symptom
6. Cylinder extends but Internal pressure leaks, or leaking retract
will not retract. hoses.
Internal relief valve setting or retract side
relief valve setting too low.
Defective over-center valve, secondary
lock valve or control valve.
Pump not developing enough pressure.
7. Pump does not run. No power or incorrect power.
Jack circuit breaker tripped.
(single-phase models only)
Jack motor overload relay tripped.
(three-phase models only)
Transformer primary or secondary fuse
blown.
Motor brushes worn.
(single-phase models only)
Loose connections or incorrect wiring.
Motor and/or electrical components worn
or damaged.
8. Pump motor turns in Wiring incorrect.
wrong direction.
(three-phase models
only)
9. Pump motor runs hot Motor worn or damaged.
or trips circuit breaker.
(single-phase models)
Motor is "single phasing".
(three-phase models only)
Pump motor runs hot
Pump element damaged, worn or seized.
or trips motor overload
relay. (three-phase
models)
10. Pump motor tries to Low voltage.
start but will not run.
Pump element jammed.
Motor and/or electrical components worn
or damaged.
11. Jack is diffi cult to roll Low tire infl ation pressure.
on wheels.
Wheel bearings need lubrication.
Wheel locknut out of adjustment.
Table 10 - Troubleshooting Guide (Continued)
Solution
Have hydraulic system inspected by Enerpac authorized service center.
Repair or replace components as required.
Have hydraulic system inspected by Enerpac authorized service center.
Repair or replace components as required.
Have hydraulic system inspected by Enerpac authorized service center.
Repair or replace components as required.
Have hydraulic system inspected by Enerpac authorized service center.
Repair or replace components as required.
Check AC line power.
Depress circuit breaker reset button (on jack electrical enclosure).
Depress reset button on motor overload relay (inside jack electrical
enclosure).
Remove both fuses and check them for continuity.
If one or both fuses are blown, check line voltage to be sure it is correct
for your jack model. Verify that the fuses installed are of the correct type
and rating. Refer to Table 9.
Note: A damaged pendant cable can cause the secondary fuse to blow.
If one or both fuses continue to blow after being replaced and the problem
cannot be determined, have the jack electrical system inspected and
repaired by an Enerpac authorized service center.
Have motor brushes replaced by Enerpac authorized service center.
Have electrical system inspected by Enerpac authorized service center.
Have electrical system inspected by Enerpac authorized service center.
Repair or replace components as required.
Reverse electrical leads.
Have motor inspected by Enerpac authorized service center. Repair or
replace as required.
Correct electrical wiring.
Have pump element inspected by Enerpac authorized service center.
Repair or replace as required.
Check AC line voltage.
Have pump element inspected by Enerpac authorized service center.
Repair or replace components as required.
Have electrical system inspected by Enerpac authorized service center.
Repair or replace components as required.
Check tire infl ation pressure. Add air if low.
Pressure should be 90 psi [6,2 bar].
Apply grease to wheel bearings.
Loosen locknut until wheel rotates freely.
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