Air Conditioner
Samsung
Updated Jul 17, 2026
Samsung AC E464 Error — DC Link Over-Voltage & Fix
E464
Samsung · Air ConditionerE464 means the DC-link voltage inside the outdoor inverter circuit has exceeded the safe l…
Quick answer
E464 means the DC-link voltage inside the outdoor inverter circuit has exceeded the safe limit.
What E464 means
The inverter converts mains AC to DC, then back to variable-frequency AC for the compressor. E464 triggers when the DC bus voltage spikes too high — usually from a mains over-voltage event or a regenerative energy surge from the compressor.
How to fix it
What does the E464 code mean?
E464 is a DC-link over-voltage protection error on the outdoor inverter PBA.
Common causes
- Mains over-voltage (supply above 260V)
- Faulty inverter board capacitors
- Compressor braking surge (rapid deceleration)
- Loose neutral connection causing voltage imbalance
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How to fix the E464 error
Check mains voltage
Measure at the outdoor disconnect. If consistently above 250V, contact your power company.
Power cycle
Switch off for 15 minutes. Capacitors need time to discharge.
Inspect the inverter board
Look for bulging or leaking capacitors.
Call a technician
If mains voltage is normal but E464 persists, the inverter board likely needs replacement.
Safety first: High voltage is dangerous. Do not open the outdoor unit's inverter compartment unless you are a qualified technician.
Part you may need: Outdoor inverter PBA / voltage stabiliser
A whole-house surge protector or AC voltage stabiliser prevents most E464 recurrences.
Frequently asked questions
Can a power surge cause E464?
Yes — a sudden spike can trigger the over-voltage protection.
Is the compressor damaged?
Usually no — E464 is the protection working correctly to prevent damage.
✎ Written by
REZAUL Karim (Riad)
REZAUL Karim (Riad) is the founder of ErrFixHub and a hands-on electronics and home-appliance repair specialist with over 15 years of experience diagnosing and fixing air conditioners, washing machines, refrigerators, inverters and other household appliances. He built ErrFixHub to turn cryptic error codes into clear, step-by-step fixes anyone can follow — cross-checking every code against manufacturer documentation and real repair-bench experience.
