The control box in the VMAC hydraulic air compressor is the computer that tells the compressor what to do and when to do it. Control boxes also give a voice to air compressors and allow them to share important information via the display box that can help with system maintenance, operation, and diagnosing issues.
If your VMAC hydraulic air compressor doesn’t have a display box, it is an earlier model that utilized red and green indicator lights instead. These lights will display in patterns, similar to Morse code, to communicate. To learn more about these indicator lights and what their patterns mean, please visit the Hydraulic Air Compressor Error Codes guide in our Knowledge Base.
Top 5 Control Box Features
The VMAC hydraulic air compressor control box has numerous features, including:
5. Air Filter Reminders
The display box will remind you to check the air filter every 100 hours and it’s at your discretion whether the filter should then be replaced. The air filter reminder will go away on its own after 6 hours of operation.
4. Service Reminders
Every 500 hours, the display box will let you know that it’s time for servicing. Use the instructions in your VMAC service kit to complete this work, and then log the service work as complete. The hydraulic air compressor control box will maintain a record of the last ten system service times, for your record.
3. Temperature Warnings
The hydraulic air compressor also has a fail-safe mechanism that prevents the system from getting too hot by automatically shutting down. The display box will let you know whether it’s the air compressor or the hydraulic oil that is overheating, which will help diagnose and resolve the issue.
In addition, the display box will notify operators during start up if the hydraulic oil is too cold (below -13°F or -25°C) or in the process of warming up.
2. Errors & Service Diagnostics
The VMAC hydraulic air compressor will also display error messages on the display box. These error messages can help operators and service techs diagnose the issue and, as a result, implement the most efficient fix possible.
1. Modify System Parameters
One of the coolest features of the hydraulic air compressor control box is the ability to modify the system parameters from the default settings to the settings that make the most sense in your environment. You can modify the following parameters:
- System Pressure
- Temperature Sensor Overrides
- System Restart Pressure
- Standby Delay
You can also review the PSI and temperatures by pressing the ON button repeatedly until the data is displayed on the display box.
Change Your Hydraulic Air Compressor Defaults
|Standby Delay||Delay time to standby||2 minutes||30 sec, 45 sec, 1, 2, 5, 10, 15, 30 minutes, Never|
|System Pressure||Maximum operating system pressure||150 PSI||110 to 150 PSI|
|Restart Pressure PSI||Air pressure set-point for pressure-based restart||120 PSI||80 to 120 PSI (limited to 30psi or more below the UNLOAD PRESSURE)|
|Temperature Probe Override (Temporary)||Override temperature controls to perform emergency system maintenance||Disabled||Enabled|
Hydraulic Air Compressor Display Box Messages
The following messages have been coded into the hydraulic control box and will be displayed on the display box:
Power ON, System Off
ON button pressed/initial start up
For further assistance with VMAC’s hydraulic air compressor, please call our technical support team at
1-888-241-2289 or visit the VMAC Knowledge Base.
Discover More Articles In Our Control Box Series
- VMAC Diesel Driven Air Compressor’s Control Box Features & Functions
- Control Box Features of VMAC DTM Air Compressor & Multipower System
- What’s Your UNDERHOOD™ Control Box Telling You?
- 4 Helpful Features of Your Multifunction Control Box