Applicable Systems
EX-300
Symptoms
The boiler reports a water level electrode fault. The electrode-based water level sensor is malfunctioning.
Possible Causes
- Electrode tip contaminated with scale
- Electrode insulation degraded
- Electrode circuit or relay fault
Troubleshooting Steps
- Step 1: Inspect and clean the electrode tip
Tip is clean and makes good contact - Step 2: Check the electrode insulation
Insulation is intact - Step 3: Verify the electrode circuit and relay
Circuit and relay operate correctly
How to Reset
To reset: Repair or replace the water level electrode, then clear the alarm.
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Source: Miura Boiler Operation Manual, Miura Corporation
Category: Boiler
Published: 2026-10-15
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