Ingersoll Rand UP6: Why Won’t My Compressor Start? Common Causes and Quick Fixes
Your Ingersoll Rand UP6 compressor is built for reliable operation but when it refuses to start, productivity stops cold. Before you call for service, there are several quick checks you can perform to potentially get back up and running fast. Here’s a practical guide to common no-start issues and their solutions.
1. Power supply or voltage issues
If the compressor doesn’t receive correct power, it won’t start or may trip immediately.
- Suggested action: Verify incoming voltage matches the compressor nameplate requirements. Check main disconnects and fuses. Inspect connections for looseness or corrosion.
2. Control voltage fault
The control circuit requires proper voltage to activate starters and safety systems.
- Suggested action: Check the control voltage fuse and connections. If the display or control board doesn’t light up, confirm auxiliary power is supplied correctly.
3. Emergency stop engaged
The emergency stop button (E-stop) disables the system to prevent operation when active.
- Suggested action: Ensure the E-stop is pulled out and reset. Check for any safety interlock faults displayed on the controller.
4. Faulty start/stop switch or pressure switch
Defective switches prevent the compressor from receiving a start signal.
- Suggested action: Inspect and test the start/stop and pressure switches for proper function. Replace if faulty or unresponsive.
- For instance: If the pressure switch isn’t responding, check your manual or part number plate to identify the correct OEM replacement for your UP6 model.
5. Motor starter or overload relay tripped
High current draw or system faults can trip protective devices, preventing restart.
- Suggested action: Reset motor starter and overload relays. Investigate cause of trip — such as mechanical binding, short circuits, or load faults — before attempting to restart.
6. Airend or drive damage
Mechanical damage or seizing of the airend can prevent the motor from turning freely, causing instant trips or failure to start.
- Suggested action: Rotate the compressor manually (if safe and possible) to check for free movement. If resistance is present, do not force it — consult a service technician immediately.
- For instance: If your airend is damaged or due for overhaul, you can explore our Airend Rebuilding Services to restore full performance without replacing the entire unit.
7. Star/Delta starter timing fault (if equipped)
Incorrect timing in the Star/Delta transition can cause starting failure or rough startup.
- Suggested action: Verify timer settings according to the manual. Adjust or replace faulty timers if necessary.
Final thoughts
Systematic checks can often get your Ingersoll Rand UP6 compressor started again without waiting for a technician. Always follow safety procedures and lockout/tagout guidelines before inspecting electrical components or moving parts.
For parts, oil, or more detailed information on the Ingersoll Rand UP6 series, visit our Ingersoll Rand UP6 resource page.