Lg Air Conditioner Error 22

⚡ Quick Answer: The LG air conditioner error code 22 indicates a communication failure between the indoor and outdoor units, often due to DC link overvoltage or compr... ✅ DIY Fixable

What Does Error 22 Mean?

The LG air conditioner error code 22 indicates a communication failure between the indoor and outdoor units, often due to DC link overvoltage or compressor overcurrent protection faults. This situation can result in the unit not starting or abruptly stopping after operation begins, leading to reduced or no cooling output. Immediate attention is required to diagnose and resolve the underlying electrical issues.

Common Symptoms:

  • Unit displays error code "22" or "CH22" on the indoor unit or remote display.
  • Air conditioner will not start or stops operation shortly after starting.
  • Reduced or no cooling output during fault condition.

Possible Causes

  • DC link overvoltage or inverter DC bus voltage too high (medium)
  • Compressor overcurrent (compressor drawing too much current) (medium)

How to Fix Error 22

DIY Fix Basic checks and power cycle

  1. Turn off the air conditioner and disconnect power at the breaker.
  2. Wait at least 10 minutes to allow internal capacitors to discharge and the system to reset.
  3. Ensure nothing is blocking airflow around the indoor and outdoor units (e.g., furniture, leaves).
  4. Check and clean/replace the air filter to improve airflow and reduce compressor load.

Technician Only Electrical and inverter system inspection

  1. Measure supply line voltage to ensure it is within the range specified on the unit nameplate; correct unstable or high voltage issues.
  2. Inspect outdoor unit wiring for loose, damaged, or corroded connections that could cause voltage spikes.
  3. Test the inverter PCB and DC bus regulation circuits; replace if defective.
  4. Check compressor electrical characteristics (current draw) and motor condition.

Parts needed: Outdoor inverter PCB, Compressor, Wiring harness, Voltage regulation components

🛑 When to Call a Pro:
  • If the error persists after power cycling and basic user checks.
  • If there are signs of electrical burning, smoke, or unusual noises from the outdoor unit.
  • If supply voltage issues are suspected (frequent brownouts or overvoltage).

Technical Specifications

wattage 2000W
component Control Board
resistance 10-30 ohms
part_number LG 6711A20045B
voltage_rating 240V AC

Common Questions

What does 22 error mean on lg air conditioner?

Error 22 indicates a communication failure related to DC overvoltage or compressor overcurrent.

Can I fix lg air conditioner 22 error myself?

Yes, try power cycling the unit and ensuring no airflow obstructions.

How much does it cost to fix 22 error?

Repair costs range from ¥20,000 to ¥100,000+ depending on parts and labor.

When should I call a technician for 22?

Call if the error persists after basic checks or if you notice unusual noises or electrical burning.

Data last verified: 2026-07-07

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