Relief Valve Adjustment - Enerpac ZE3-6 Carnet D'instructions

d. Pressing the pendant Down-Arrow (if applicable) will also
retract the cylinder.

5.7 Relief Valve Adjustment

Z-Class pumps are equipped with one user adjustable relief
valve (see Figure 10.) It can be adjusted as follows:
1. Install a gauge on the pump. If a unit is equipped with
optional pressure transducer, verify AUTOMODE is off. (See
section 6.1C for more details).
2. Start the pump to allow the oil to warm.
3. Loosen the set screw locking nut.
4. Shift the control valve and build pressure in the system.
Using an Allen wrench, turn the set screw counter-clockwise
to decrease pressure and clockwise to increase pressure.
NOTE: To get an accurate setting, decrease the pressure to
a point below the final setting and then slowly increase the
pressure until it reaches the final setting.
5. Tighten the locking nut when the desired pressure is set.
6. Shift the control valve to the neutral position, allowing the
system pressure to return to 0 psi.
7. Recheck the final pressure setting by shifting the control
valve and pressurizing the system.
Relief valve body (DO NOT TURN relief
valve body.)
Locknut
6.0 LCD ELECTRICAL USE INSTRUCTIONS
The LCD version of the Z-class Pump is driven and operated by
a set of two boards: the Power Board (PB) and the Control Board
(CB), connected to each other by a flat cable.
On the PB are the terminals for the main power supply, the
motor power supply and all peripherals such as fan, valve
solenoids, pendant, pressure switch, pressure transducer, oil
temperature switch, and oil level switch. The PB also contains
the transformer, circuit breaker, rectifier and drivers.
CAUTION: The CB is an electrostatic sensitive device.
Special care has to be taken while handling this board
(i.e.: ESD wristbands).
6.1 LCD Function
Screen 1
Number
display 00000000
SET
0000.0
HOURS CYCLES
LOW MOTOR
VOLTAGE OVERLOAD
Besides the pendant, which is used to switch the motor on/off
and operate the valves, the CB with its four-button switches is
Set screw
Figure 10
Text display
PSI MPa
BAR
the main interface between the operator and the pump. With the
use of these four-button switches all functions and settings that
are described in the following can be activated.
CAUTION: Make sure that the plastic overlay, that
protects the LCD screen and the button switches, is not
broken or otherwise damaged. Never punch the button
switches with a sharp or pointed instrument, use fingertips only.
Clean the overlay regularly with a damp cloth; never use
aggressive or abrasive detergents.
A. Boot Sequence
When the pump is connected to electrical power the LCD screen
will show: "FIRMWARE" x.x for 1 second, then "Model xx" for 0.5
seconds, and then "Motor UN/1P/3P" for 0.5 seconds. Additional
information may appear depending on model and installed
accessories. See section 8.0 for more detailed information.
This is setup information about your pump that maybe needed for
service. The boot sequence is finished successfully when the text
display on the LCD screen shows "OK" (sequence takes
approximately 2 seconds).
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:
• 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.
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 the low voltage hour-meter (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
6
/ Down Arrow / Up Arrow