Emergency Stop (Alarm 2000)

Common Symptoms

• Alarm 2000 shown on the Xc-series controller display
• Machine may shut down or refuse to load, depending on the alarm class

Probable Causes (Ranked by Likelihood)

• The condition named by the alarm: Emergency Stop High
• Sensor, switch or wiring fault in the monitored circuit producing a false alarm Moderate

Step-by-Step Diagnostic Procedure

1. Identify which Xc-series controller your machine has FIRST (Xc1004, Xc2003 or Xc4004 — it is named on the controller face or in the machine documentation). The same alarm number can mean different things on different controllers, so the controller identity is part of the diagnosis.

2. On Xc1004, Xc2003, Xc4004: alarm 2000 = Emergency Stop — Emergency stop has been activated Controller is missing reference voltage to Emergency Stop Input

3. Check whether an emergency-stop button is latched in — twist or pull to release, then reset the alarm. If no button is pressed, the controller may be missing reference voltage to the emergency-stop input, which means a wiring or contact fault in that circuit rather than a real stop.

4. This page is built from Atlas Copco's published Xc-series alarm table (linked below). For machine-specific procedures, use the manual for your exact unit — the table defines what the alarm is, not every model's repair steps.

Frequently Asked Questions