E5
TCL
Compressor Overcurrent / Overload Protection
Indoor unit shows E5 and stops; may relate to overcurrent or voltage issues
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Low supply voltage to TCL outdoor unit, Shorted compressor windings, Seized compressor, Faulty outdoor inverter PCB or current sensing circuit
How to Fix / Troubleshooting
Safety first: Turn OFF the main breaker to the air conditioner before any inspection.
- Step 1 – Check supply voltage: Use a multimeter (if qualified) to verify that the supply voltage at the outdoor unit is within the range specified on the nameplate. If voltage is low or unstable, contact an electrician or utility provider.
- Step 2 – Inspect wiring and terminals: With power off, tighten all terminal screws at the outdoor unit. Look for burnt wires or discoloration around the compressor terminals.
- Step 3 – Reset and test: Restore power and try running the unit. If E5 appears immediately, the compressor or inverter PCB may be faulty.
- Step 4 – Professional diagnosis: A technician should measure compressor winding resistance and insulation, and check the inverter board for faults. Replace the outdoor main PCB or compressor as required.
Warning: Compressor and inverter circuits carry high voltage and can store energy. Only trained personnel should perform live electrical tests.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter PCB
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