Troubleshooting Guide - Enerpac ZU4 T Serie Manual De Instrucciones

Pressure values are updated 5x per second on the display.
9.0 TROUBLESHOOTING (SEE TROUBLE-SHOOTING
GUIDE)
Only qualified hydraulic technicians should service the pump or
system components. A system failure may or may not be the
result of a pump malfunction. To determine the cause of the
problem, the complete system must be included in any diagnostic
procedure.
The following information is intended for use as an aid in
determining if a problem exists. For repair service, contact your
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 torque wrench does
not advance
Torque wrench does not
Auto Cycle or Auto Cycles
erratically.
Torque wrench will not
retract
Pump runs hot
After boot-up LCD shows
"P switch open"
LCD shows "FILTER"
* See sections 6.2 Fault, 6.3 Warning Conditions and 6.4 LCD Menus.
Trouble-shooting Guide
Possible Cause*
Fault condition
Motor brushes worn to end of life
Pump in LOCAL mode
Pendant damaged
Low voltage
No power to pump 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
Torque greater than wrench capacity at full pressure
Advance flow to wrench restricted or blocked
Auto Cycle mode set to OFF
Relief valve setting at or below "SET PRES" or "HI
PRESS" value
SET PRESS value below 2900 PSI (200 Bar)
(Firmware 5.5 and earlier)
HI PRESS value below 1400 PSI (96 Bar) (Firmware
5.6 and later)
Retract flow restricted or blocked
Valve malfunction
Advance or retract flow restricted
High ambient temperature
Loose jumper on power board
Loose jumper on power board
local Authorized Enerpac Service Center.
See section 5.0 Operation and 6.2 Fault Conditions for details
See Section 7.4 Motor Brush Replacement
See section 6.4I Local Menu
See Section 6.4K, Diagnose Menu
See authorized Service Center
See section 6.3A and 6.4F
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 5.3A
Inspect and repair or replace
See authorized service center
See authorized service center
See authorized service center
Use torque wrench with larger capacity
Check couplers for full engagement per section 4.5
Switch Auto Mode ON according to section 6.4B
Increase relief valve setting per section 5.3A
Upgrade pump Firmware to 5.6 or later, see Enerpac sales
representative or Authorized Service Center
Raise HI PRESS value above 1400 PSI (96 Bar)
Check couplers for full engagement per section 4.5
Run motor while retracting
See authorized service center
Check couplers for full engagement per section 4.5
Install heat exchanger
Check power board pressure switch jumper for being loose or
missing (see Fig. 9).
Check power board filter jumper for being loose or missing (see
Fig. 9)
11
Action*