Sewage pump fault codes — what they mean & what to do
Fault codes are your pump system’s way of reporting problems. This guide explains the most common sewage pump fault codes, what causes them, and when engineer intervention is required.
Fault codes are triggered when a pump system detects unsafe operating conditions. While codes vary by manufacturer, the underlying causes are usually consistent.
Electrical and mechanical fault indicators
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Early warning before total failure
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Critical for safe troubleshooting
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Typical sewage pump fault codes explained
Most control panels use different codes or lights, but they usually point to the same underlying issues. These are the most common categories engineers see.
Request diagnosis →Overload / overcurrent
The pump motor is drawing excessive current, often due to blockage or mechanical resistance.
Thermal trip
Motor temperature has exceeded safe operating limits.
Seal or moisture fault
Water ingress detected inside the motor or junction chamber.
High level alarm
Wastewater level is rising faster than the pump can clear.
Control panel fault
Internal relay, timer or logic failure inside the panel.
Phase failure / supply issue
Incorrect voltage or phase imbalance detected.
Run time exceeded
Pump has been running longer than expected, indicating inefficiency or blockage.
Pump failed to start
Electrical or mechanical issue preventing startup.
Why fault codes should never be ignored
Prevent full motor burnout
Early intervention reduces risk, cost and long-term system damage.
Avoid sewage flooding
Early intervention reduces risk, cost and long-term system damage.
Reduce emergency repair costs
Early intervention reduces risk, cost and long-term system damage.
Protect control panel electronics
Early intervention reduces risk, cost and long-term system damage.
Frequently asked questions
Are sewage pump fault codes the same across brands?
No. Code numbers differ, but the underlying fault types are usually similar.
Can I reset a sewage pump fault?
Some faults reset temporarily, but repeated codes indicate a deeper issue.
Do fault codes always mean pump replacement?
No. Many faults are repairable if diagnosed early.
Related pump services
Seeing a sewage pump fault code?
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