Alarm 4190 — Meaning Depends on Controller: H.P. Element temp. sensor circuit / single stage 2 elements

Common Symptoms

• Alarm 4190 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)

• Depends on the controller fitted — see the per-controller meanings in the diagnostic steps 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 4190 = H.P. Element temp. sensor circuit — The High Pressure Element Temperature Sensor wiring is monitored for shortcircuit and wirebreak.

3. On Xc1004, Xc4004: alarm 4190 = single stage 2 elements

4. High-temperature alarms on a compressor are usually oil level, cooler cleanliness, or ambient conditions before they are sensors — check those in that order.

5. A circuit alarm means the controller lost a plausible signal — check the sensor connector and wiring for damage or corrosion before replacing the sensor itself.

6. 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