Low-voltage or overcurrent protection

What it means

On Gree units, E5 usually means the system shut itself off because current draw was too high or supply voltage too low. The cause may be the building supply or the compressor and its components. The meaning can vary by model, so check the manual for your unit.

Symptoms3

• The AC starts, then cuts out after a few minutes.
• Clicking or repeated start attempts from the outdoor unit.
• The breaker in the panel may trip occasionally.

Possible causes5

• Low or fluctuating mains voltage during peak demand.
• Weak compressor run capacitor.
• Dirty outdoor coil increasing compressor load.
• Loose or burnt electrical connections.
• Failing compressor or control board in harder cases.

How to diagnose and fix5

1. Switch off and wait several minutes before restarting.
2. Make sure the unit is on a proper dedicated breaker, not an extension lead.
3. Notice whether lights dim when the AC starts, which suggests low voltage.
4. Have a technician measure current and test the capacitor and wiring.
5. Do not open the outdoor unit yourself; capacitors can hold a dangerous charge even after the power is off.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

A capacitor or tightening connections is relatively cheap; a compressor or control board replacement is expensive.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.

Frequently asked questions