H5
Sencor
IPM (Intelligent Power Module) Protection
Display shows H5, unit may not operate or may shut down shortly after starting.
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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
Overheating of inverter module, Poor heat sink contact, Blocked outdoor unit ventilation, Faulty IPM on PCB
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before accessing the outdoor PCB.
- Step 1 – Check outdoor ventilation: Ensure the outdoor unit is not enclosed or blocked. Provide adequate clearance for heat dissipation.
- Step 2 – Clean PCB compartment: Open the outdoor electrical box and gently blow out dust with dry compressed air. Do not touch components with metal tools.
- Step 3 – Inspect heat sink: Verify that the inverter module heat sink is not loose and that any cooling fan (if present) is operating.
- Step 4 – Cool-down period: Allow the unit to remain off for 30 minutes, then restart.
- Step 5 – Professional repair: Persistent H5 indicates a failing IPM or PCB, which must be replaced by a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter Power PCB
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