Fault Conditions - Enerpac ZU4 Serie Instructions

The micro-controller will automatically recognize the optional
pressure transducer (if equipped). In this case the reading after
the boot process is "OK" in the text display and the current
pump-pressure on the numeric display.
B. LCD Operational Buttons
The CB is equipped with four button switches, from left to right
On/Off / Menu
• The On/Off button toggles the motor ON and OFF. The motor
OFF function is available on this button even if the pump is
NOT in the local mode but is operated by using the pendant.
• The Menu button enables the operator to step from normal
operational mode into menus. With repeated pressing the
operator steps through the various menus. Pressing the
Menu button also saves any changes made. To return to the
normal operational mode, press and hold the Menu button
for two seconds or don't push any button for 60 seconds.
• The Down Arrow and Up Arrow buttons serve two purposes.
When the display shows one of the menus, the Down Arrow
and Up Arrow buttons are used to step through the menu's
options. When the pump is placed in Local Mode, the Down
Arrow and Up Arrow buttons switch the B and A electric
solenoids (the pendant is non-operational in local mode).
C. Menus Available
The software provides the operator with the following Menus:
• Set Pres - (Firmware 5.5 and earlier) this menu is only
available when the optional pressure transducer is installed.
(The hidden calibration menu for the digital gauge is
accessed from this menu.)
• Units - this menu is only available when the optional
pressure transducer is installed. Set the pressure units to
PSI / BAR / MPa, with psi being the default setting.
(Firmware 5.6 and later.) The hidden menus for "AUTOMODE"
(HI PRESS and LO PRESS) and Calibration of the digital
gauge are accessed from this menu.
• Motor - display the motor hour meter and on/off cycle
counter (nonresetable)
• Low Volt - display
(nonresetable)
• Advance - display the Advance solenoid hour meter and
on/off cycle counter (nonresetable)
• Retract - display the Retract solenoid hour meter and on/off
cycle-counter (nonresetable)
• Local - set the pump local mode on/off
• Language - set the language of the display to English /
Spanish / French / Italian / German / Portuguese, with
English being the default setting
• Diagnose – display to show input signals from the pendant
and other electrical accessories

6.2 Fault Conditions

Any fault will shut down and prevent pump from starting.
A. Clearing a Fault Condition from the LCD
After the fault causing problem has been corrected, clear the fault
message from the LCD by disconnecting electrical power from the
pump, wait until all characters clear the LCD (~ 10 seconds), then
reconnect power.
/ Down Arrow / Up Arrow
the low voltage hour-meter
B. Power Failure
Display: "POWER OFF"
Screen 2
The Power Off fault is displayed when the main power supply drops
to 65% or less of nominal voltage. The pump will automatically shut
off the valves and the motor, and display "Power Off" on the LCD.
NOTE: Power Off is also displayed for several seconds after the unit
is disconnected from electrical power.)
C. Button Fault
Display: "Button Fault"
Screen 3
BUTTON
FAULT
The Button Fault is displayed when the microprocessor detects
any button press during the boot sequence or if shroud on/off
button is held in for more than 3 seconds.
D. Motor Overload
Display: "MTR OVLD"
Motor Overload
Screen 4
MTR OVLD
The Motor Overload fault is displayed when the electric current
drawn by the motor exceeds the pre-set limit of the internal
circuit breaker. (The internal circuit breaker will automatically
reset once the condition has been corrected; however, the
operator must clear the fault and then press the motor on/off
button to restart the motor).
6
POWER
OFF
MOTOR
OVERLOAD