Applicable Systems
PSE200/PSE201
Symptoms
The pneumatic system reports a pressure switch fault. A pressure switch is not operating at the correct setpoint.
Possible Causes
- Switch diaphragm or spring fatigued
- Switch contacts oxidized or worn
- Switch calibration drift from vibration
Troubleshooting Steps
- Step 1: Test the switch actuation pressure against the setpoint
Switch activates at the correct pressure - Step 2: Inspect the switch contacts for oxidation
Contacts are clean and make positively - Step 3: Recalibrate or replace the pressure switch
Switch operates reliably at the setpoint
How to Reset
To reset: Repair or replace the pressure switch, then clear the alarm.
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Source: SMC Pneumatic Equipment Manual, SMC Corporation
Category: Hydraulic & Pneumatic
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