Samsung Error Code E5: Inverter Overcurrent
How to Fix Samsung Code E5
- Step 1: Turn the unit off and then back on again at the indoor thermostat. Sometimes this will reset the system. If the error returns immediately, proceed to the next step.
- Step 2: Check the outdoor unit for any obvious obstructions blocking airflow, such as leaves, snow, or debris. Clear any obstructions.
- Step 3: Ensure the outdoor unit is receiving proper power. Check the breaker at your electrical panel. If the breaker is tripped, reset it. If it trips again immediately, leave it off and call a professional.
- Step 4: If the error persists after these steps, contact a qualified HVAC technician to diagnose and repair the system.
How to Reset Samsung Code E5
- Turn off the unit using the remote control or wall controller.
- Turn off the circuit breaker for the outdoor and indoor units. Wait 60 seconds.
- Restore power at the breaker.
- Turn the unit on with the remote control. If the error returns, the fault needs professional diagnosis.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Samsung Error Code E5 Mean?
The E5 error code on your Samsung mini-split indicates an 'Inverter Overcurrent' condition. This means the system's inverter, which controls the speed and power of the compressor, has detected excessive current. This is like a breaker tripping in your house, but within the mini-split's electronics. The system shuts down to protect itself from damage. This usually points to a problem with the compressor, the inverter board itself, or potentially a wiring issue causing a short circuit. Because the inverter controls the compressor, the unit won't be able to heat or cool effectively until the problem is fixed. Continuing to try and run the unit could cause further damage to expensive components.
Common Causes
- Compressor failure or locked rotor
- Faulty inverter board
- Short circuit in the wiring between the inverter and compressor
- Overcharge of refrigerant causing excessive compressor load
- Incorrect voltage supply to the outdoor unit
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Unit displays E5 error | Measure the compressor windings resistance (U-V, V-W, U-W). | All windings should have similar resistance values, typically a few ohms. Open or shorted windings indicate a faulty compressor. |
| Compressor windings are OK | Check the DC voltage between the P and N terminals on the inverter board. | Should read approximately 300-400 VDC. Significantly lower or absent voltage indicates a problem with the power supply to the inverter. |
| DC voltage is present | Inspect the wiring between the inverter board and the compressor for shorts or damage. | Wiring should be intact with no signs of damage or shorts to ground. |
| Wiring is intact | Check the refrigerant charge. | Refrigerant charge should match the nameplate value. Overcharging can cause the compressor to work harder and draw more current. |
Applicable Samsung Models
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Inverter Board | — | — | — |
| Compressor | — | — | — |
| Overload Protector | — | — | — |
Related Codes on Same Models
Other codes that affect the same Samsung model families as E5.
| Code | Description | Severity |
|---|---|---|
| E1 | Communication Error | Warning |
| E1-21 | Compressor Overcurrent | Warning |
| E1-54 | IPM Fault | Warning |
| E2 | Room Temp Sensor Fault | Warning |
| E2-14 | Freeze Protection Active | Warning |
| E3 | Indoor Coil Sensor Fault | Warning |
| E4 | Outdoor Coil Sensor Fault | Warning |
| E4-64 | High Pressure Trip | Warning |
| E4-65 | Low Pressure Trip | Warning |
| E6 | Outdoor Fan Motor Fault | Warning |