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Samsung / WindFree Premium

Samsung C122 error code

C122 is Motion sensor error. The unit is stopping or limiting operation because that reading or component cannot be trusted. Manual trigger: C122 means Motion sensor error.

All Codes
Urgency
advisory
Verified
Jul 30, 2026
Fix path
Technician

What it means

C122 is Motion sensor error. The unit is stopping or limiting operation because that reading or component cannot be trusted. Manual trigger: C122 means Motion sensor error.

Urgency

advisory

This is not usually an immediate safety hazard, but do not keep resetting it. Try only the safe homeowner check below; if the same code returns, schedule service.

Likely causes

  1. Brief power event, brownout, or unstable supply voltage
  2. Loose power connection, reactor, or outdoor electrical component problem
  3. Inverter/IPM protection or current-detection fault
  4. Compressor winding, drive, or outdoor board fault after power checks pass

Homeowner fix

Turn the system off with the remote, then power cycle once at the breaker or disconnect if you can do that safely. Expected result: a temporary sensor fault clears; if C122 returns, stop resetting and schedule service. Do not remove panels.

When to call a pro

Call a licensed HVAC technician if C122 returns after the safe homeowner check. Tell them the exact Samsung code and meaning: Motion sensor error.

This code points to compressor and electrical or inverter work - get repair quotes from contractors in your area.

Get repair quotes

Repair vs replace

Sensor and control faults are usually repairable. Compare repair with replacement only if the system is older, out of warranty, or several sensors or boards are being quoted together.

See Samsung mini-splits

Your Samsung model

WindFree Premium model pages in the Samsung catalog help compare this repair path with current replacement options.

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For your technician

Technician note: verify motion sensor placement, resistance, connector condition, harness continuity, and PBA input before replacing parts. Page context: Samsung maps this display to the WindFree Premium line; source: Samsung WindFree Premium R-32 Service Manual; display convention: match the letter C and one hundred twenty two marker exactly before comparing neighboring codes.

Which systems show it

  • Samsung R-32 residential ductless diagnostics anchored to WindFree Premium and used as common Samsung C-code homeowner guidance for current R-32 residential mini-split coverage.

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Your mini split is showing a refrigerant leak codeMini split indoor unit freezing upMini split outdoor unit not running

Reset note

Power cycle once only if the homeowner fix says it is safe; do not keep resetting a returning code.

Manual trigger

C122 means Motion sensor error.

Related codes

C121 error codeC123 diagnosticsC108 Technician pathC140 Technician path

Source

Samsung WindFree Premium R-32 Service Manual
Section
Section 9 troubleshooting index, indoor error list
Page
Section 9 troubleshooting index

Short quote: "Motion sensor error"

Sourced Jul 2026

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