Alarm 4300 — Meaning Depends on Controller: Conf temp input 1 alarm 1 / M.P. Element temp. alarm 1

Common Symptoms

• Alarm 4300 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 Xc2003: alarm 4300 = Conf temp input 1 alarm 1

3. On Xc4004: alarm 4300 = M.P. Element temp. alarm 1

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. 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