E6
Sharp
Compressor Start Failure / Inverter Drive Fault
Unit attempts to start but quickly stops; E6 appears on the indoor display.
Advertisements
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.
Advertisements
Possible Causes
Failed inverter IPM on outdoor PCB, Open or shorted compressor windings, Loose compressor wiring harness, DC bus under-voltage or over-voltage
How to Fix / Troubleshooting
Safety first: Compressor and inverter circuits carry dangerous voltages. Only qualified persons should test or replace these components. Always isolate power at the main breaker.
- Check supply voltage: Ensure the outdoor unit is receiving the correct mains voltage within Sharp’s specified range. Undervoltage can cause E6.
- Inspect compressor terminals: With power off, remove the compressor terminal cover. Check for burnt or loose terminals. Tighten gently if loose; do not overtighten.
- Wiring harness: Verify that the compressor harness is firmly connected to the outdoor PCB and that insulation is intact.
- Professional testing: Measuring compressor winding resistance and insulation requires a multimeter and megohmmeter. If windings are open/shorted or insulation is poor, the compressor must be replaced by a licensed HVAC technician.
- Inverter module: If the compressor tests good but E6 persists, the inverter power module on the outdoor PCB is likely faulty and the entire board or module should be replaced by a Sharp service center.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Compressor and Outdoor Inverter PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements