I can't change target pressure in intellisys. display indicate -5.1 bar. what can i do?

ECOAIR COMPRESSOR MODEL t100z
How to chance pressure in to psi to bar

Ingersolll Rand website support section should be able to provide a manual.
Failing that contact customer services.

But it is Asking unlock password

I did find the manual hope it helps
ww1 ingersolrandproducts com

Try resetting the SMC
Before Resetting the SMC Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to determine if the issue still occurs.

1. Press Command + Option + Escape to force quit any application that is not responding.
2. Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosing Sleep. Wake the computer after it has gone to sleep.
3. Restart your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
4. Shut down your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.

If your Mac appears to be running normally but isn't responding, force the computer to shut down by pressing and holding the power button for 10 seconds. Note: You will lose any unsaved work in any open applications.
For Mac portables experiencing issues related to the MagSafe power adapter and/or battery, try:

1. Unplug the MagSafe power adapter from the Mac and the wall power socket for several seconds.
2. Shutdown the Mac. Physically remove and re-insert the battery (if it's removable) and startup the Mac.

If the issue is still not resolved after following the troubleshooting items above, an SMC reset may be necessary.
After performing normal troubleshooting, these symptoms may indicate that an SMC reset may be necessary:
Fans
The computer's fans run at high speed although the computer is not experiencing heavy usage and is properly ventilated.
Lights
The keyboard backlight appears to behave incorrectly (on Mac computers that have this feature).
The Status Indicator Light (SIL) appears to behave incorrectly (on Mac computers that have an SIL).
Battery indicator lights, if present, appear to behave incorrectly (on portables that use non-removable batteries).
The display backlight doesn't respond correctly to ambient light changes on Mac computers that have this feature.
Power
The computer doesn't respond to the power button when pressed.
A portable Mac doesn't appear to respond properly when you close or open the lid.
The computer sleeps or shuts down unexpectedly.
The battery does not appear to be charging properly.
The MagSafe power adaptor LED doesn't appear to indicate the correct activity.
System Performance
The computer is running unusually slowly although it is not experiencing abnormally high CPU utilization.
Application icons may "bounce" in the Dock for an extended amount of time when launched.
Applications may not function correctly or may stop responding after being opened.
Video
A computer that supports target display mode does not switch into or out of target display mode as expected.
A computer that supports target display mode switches into or out of target display mode at unexpected times.

For and SG controller use the following instructions to access factory setpoints which will allow you to change the pressure setting. Note : look at the metal data tag affixed to the compressor for the correct pressure setting. (eg: 125 psi) do not exceed the data tag pressure or premature damage to the compressor and personal injury may occur.

To access... Power must be applied to the
compressor with READY TO START showing in
the display.... press the center (MAIN MENU)
display button two times and then press the LOAD
button followed by the UNLOAD button, all within
three seconds.
To change settings... The values of the Factory
Setpoints can be changed using the same buttons
and procedures used to change the Operator
Setpoints. Refer to the Operator's Manual for
details.
To exit... Press either the STATUS or MAIN MENU
buttons. If no buttons are pressed within 30
seconds, the display will automatically return to
the Current Status screen showing Package
Discharge Temperature and Airend Discharge
Temperature

David ,I will need more info like type of intellisys controller. IR actually has at least 4 intellisys controller. Need to know what controller you have. Model and serial #, HP, voltage, Ep,XF,HP, Y-delta start or DOL start. pressure rating from ID tag. Some info can be obtained from the metal tag affixed to one end or in the electrical compartment (ID tag)

Goto factory setting change design pressure setting of the unit.

OK, Compressor should be shut down and showing (ready to start) in display. Press load/unload button once then press hidden right button within 3 seconds. This will let you access the set point program. It will include language, temperature and pressure, rated pressure,etc. Make sure you look at the data tag affixed to the unit and see what the rated pressure is for your unit. You can endanger yourself and equipment by over pressurizing the components of the compressor.

I have a Few questions before trying to answer.Does the pressure go up quickly to 200 psi and down to 120 psi or does the pressure build slowly to 200 psi and slowly down to 120 Psi. Does this unit have a dryer built in or in the system. Are the pressures set correctly on the intellisys. Does this unit have modulation. What mode of operation is unit in.
Pressure building up fast is an indication of an obstruction in the discharge line. It could be a valve positioned wrong or a dryer froze up. If the pressure builds slowly up and down it sounds like the intellisys settings are incorrect. If the unit has modulation and is operating in modulation it sounds like the cash regulator needs adjusting.