N2 Troubleshooting
Daniel Mullany guides you through the troubleshooting steps necessary when your SRD (Spin Rinse Dryer) encounters N2 (Nitrogen) Pressure Loss. Whether you’re a seasoned technician or new to SRDs, this step-by-step guide offers clear instructions and practical tips to identify and resolve N2-related issues—ensuring your tool stays up and running.
Tools Needed:
- Multimeter or jumper wire (for sensor testing)
Troubleshooting Steps:
1. Understand the Alarm
N2 pressure loss occurs when the system’s 20 PSI switch doesn’t detect sufficient nitrogen pressure. This prevents the SRD from running, acting as a critical fail-safe for system integrity.
2. Verify the Alarm Condition
- If your SRD uses the SITEK SlickDevice Controller, you’ll see a clear N2 Pressure Loss alert on the touchscreen.
- If your system uses a PSC 101 or 102 controller, the tool will still alarm—though without a graphic interface.
3. Clear the Alarm
- On SlickDevice: Go to the Alarm Screen, tap the N2 icon, then press Return.
- On PSC controllers: Press the Stop button on the front panel to reset the alarm.
4. Check the 20 PSI Pressure Sensor
- Locate the 20 PSI switch (usually mounted near the N2 supply line).
- Disconnect both Quick Connect fittings from the sensor.
- Temporarily jump the two connections.
- If this clears the alarm, the pressure switch has failed and needs replacement.
- SITEK sells replacements for this common consumable.
5. Consider Facility Issues
If replacing the sensor doesn’t help, the issue may be upstream:
- Undersized N2 Line: Ensure the facility line is large enough for proper N2 flow.
- Improper Tees: Avoid splitting a single N2 source to two chambers.
- Shared Regulators: Each chamber should have its own dedicated regulator.
- Flow-Limiting Regulators: Even if line size is correct, internal restrictions in the regulator can cause problems.
Remember: While it may appear as a single unit, a dual-chamber SRD functions as two independent tools. Proper N2 delivery to both chambers is critical.
Need help servicing your SRD?
📞 +1 916-797-9000
✉️ sales@sitekprocess.com
We repair and support Semitool, Verteq, and SITEK Spin Rinse Dryers, and we carry all the spare parts you need.
For more tutorials and maintenance tips, follow us on YouTube:
www.youtube.com/@sitekprocesssolutions3279
