Emergency Shutoff

What does E37. mean?

An emergency shutoff fault is triggered when the safety input terminals GS1/GS2 are activated, initiating a protective shutdown of the inverter. This is a critical safety response, indicating that an external emergency stop device or safety system has detected a hazardous condition and commanded the inverter to cease operation immediately.

• Activation of an external safety device (e.g., E-stop button, safety light curtain, safety gate switch) connected to the GS1/GS2 safety input terminals.
• Short circuit or wiring fault in the safety circuit connected to GS1/GS2, causing an unintended activation of the safety input.
• Malfunction of an internal safety relay or associated safety monitoring circuit within the inverter itself, falsely triggering the safety shutdown.
• Incorrect parameter setting for the safety inputs, such as A1-01 (Safety Input Configuration) not matching the actual external safety circuit wiring.

Click steps to track your progress.

1. 1

   Identify and inspect all external safety devices connected to the GS1/GS2 safety input terminals. Confirm their current state (e.g., E-stop released, gate closed).

2. 2

   Measure the voltage/continuity across the GS1/GS2 terminals at the inverter input, verifying the safety circuit's integrity according to the inverter's safety manual (e.g., 24VDC high for safety active).

3. 3

   Disconnect all external wiring from GS1/GS2. If the fault clears, the issue is with the external safety circuit or its wiring.

4. 4

   Verify parameter A1-01 (Safety Input Configuration) matches the actual external safety circuit wiring (e.g., 1-channel or 2-channel input, NC/NO contacts).

5. 5

   If the fault persists with external wiring disconnected and parameters are correct, the internal safety circuit or control board may be defective and require replacement.