Miura EX-300 Error Code M018

Miura Boiler Major Valve

Model: EX-300 | Code: M018

Applicable Systems
EX-300

Symptoms

The boiler reports a feed water regulating valve fault. The modulating feed water valve is not maintaining the level.

Possible Causes

  • Valve positioner out of calibration
  • Valve actuator air supply insufficient
  • Level controller PID settings incorrect

Troubleshooting Steps

  1. Step 1: Calibrate the valve positioner
    Positioner tracks the control signal accurately
  2. Step 2: Verify the actuator air supply
    Air pressure meets the actuator requirement
  3. Step 3: Tune the PID parameters for stable level control
    Level holds steady at setpoint

How to Reset

To reset: Repair the feed water regulating valve, then clear the alarm.

Related Miura Fault Codes

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Source: Miura Boiler Operation Manual, Miura Corporation

Category: Boiler

Published: 2026-10-28