What does LG AC error code CH 01 mean?

CH 01 indicates a communication error between the indoor unit and system, usually caused by wiring issues or connection failure.

How do I fix LG CH 03 error?

Check drain hose blockage, inspect drain pump, clean drain pan, and restart the unit.

Is LG CH 38 dangerous?

Yes. CH 38 indicates a refrigerant leak. Turn off immediately and contact a technician.

Can LG AC errors reset automatically?

Some errors reset after turning off power for 5–10 minutes and restarting the unit.

Why does my LG air conditioner keep showing error codes?

Common causes include sensor failure, dirty filters, wiring issues, or unstable power supply.

When should I call a technician for LG AC errors?

Call a technician if there is compressor failure, refrigerant leak, PCB issue, or repeated errors after reset.

Daikin System Messages Error Codes

Complete Daikin System Messages Guide

This guide explains all Daikin System Messages error codes (CH series) with simple troubleshooting steps to help you identify and fix common issues safely before calling a technician.

DAI-SYS01

Power Supply Initialization Error

Check main power supply and circuit breaker.
Ensure stable voltage input to the system.
Inspect wiring connections for looseness.
Restart the Daikin system after verification.

DAI-SYS02

Indoor Unit Communication Fault

Check communication wiring between units.
Inspect connectors for corrosion or damage.
Reset indoor and outdoor units.
Replace communication board if error persists.

DAI-SYS03

Outdoor Unit Communication Failure

Inspect outdoor PCB connections.
Check signal wiring integrity.
Restart system power cycle.
Service control board if malfunction continues.

DAI-SYS04

Refrigerant Flow Abnormality

Check refrigerant pressure levels.
Inspect piping for leaks or blockages.
Ensure expansion valve is functioning properly.
Call certified technician for recharge if needed.

DAI-SYS05

Compressor Overload Protection Active

Allow compressor to cool down.
Check airflow around condenser unit.
Inspect refrigerant charge balance.
Reduce system load and restart.

DAI-SYS06

Compressor Startup Failure

Check power supply stability.
Inspect capacitor and compressor wiring.
Ensure compressor is not mechanically locked.
Call technician if restart fails repeatedly.

DAI-SYS07

Fan Motor Malfunction

Inspect fan blades for obstruction.
Check motor wiring connections.
Clean dust buildup from fan assembly.
Replace fan motor if required.

DAI-SYS08

Heat Exchanger Sensor Fault

Check sensor wiring connection.
Inspect thermistor for damage or corrosion.
Verify sensor resistance values.
Replace sensor if readings are abnormal.

DAI-SYS09

Drain System Blockage

Check drain hose for clogging.
Clean condensate pan and drain pipe.
Ensure proper water flow.
Remove debris from drainage path.

DAI-SYS10

High Pressure Protection Activated

Clean condenser coils and filters.
Check airflow restrictions.
Inspect refrigerant overcharge condition.
Restart system after load reduction.

DAI-SYS11

Low Pressure Warning

Check refrigerant leakage points.
Inspect piping and joints.
Verify system pressure readings.
Recharge refrigerant if necessary.

DAI-SYS12

Inverter Circuit Fault

Turn off power immediately.
Inspect inverter PCB for damage.
Check compressor drive circuit.
Replace inverter module if needed.

DAI-SYS13

Overheating Protection Activated

Ensure proper ventilation around unit.
Clean air filters and coils.
Check fan operation.
Allow system to cool before restart.

DAI-SYS14

Defrost Cycle Active

Wait for cycle to complete automatically.
Do not power off the system.
Ensure outdoor unit airflow is clear.
Check for normal operation after defrost.

DAI-SYS15

Sensor Signal Abnormality

Inspect sensor wiring connections.
Check for loose or damaged connectors.
Test sensor resistance values.
Replace faulty sensor if needed.

DAI-SYS16

General System Failure

Restart the Daikin system.
Check all electrical connections.
Inspect for visible hardware faults.
Contact service center if issue persists.

Frequently Asked Questions

What does DAI-HP01 Heat Pump Not Detected mean?

Check power supply, ensure the Daikin heat pump is switched on, replace remote batteries, and reset the system.

What does DAI-HP02 No Heating or Cooling Output mean?

Verify correct mode selection, adjust thermostat settings, clean air filters, and inspect system operation.

What does DAI-HP03 Weak Airflow mean?

Clean or replace air filters, remove dust buildup, check fan operation, and ensure vents are not blocked.

What does DAI-HP04 Water Leakage Alert mean?

Check drain line for blockage, clean condensate pan, ensure proper installation level, and inspect for ice buildup.

What does DAI-HP05 Abnormal Noise From Unit mean?

Inspect for loose panels, clean fan blades, remove foreign objects, and check compressor or motor condition.

What does DAI-HP06 Heat Pump Not Starting mean?

Check circuit breaker and power supply, replace remote batteries, verify wiring connections, and reset the unit.

What does DAI-HP07 Remote Control Failure mean?

Replace batteries, clean IR sensor, remove obstructions, and test manual or wall controller operation.

What does DAI-HP08 System Auto Shutdown mean?

Check timer settings, inspect power stability, clean filters to prevent overheating, and restart the system.

What does DAI-HP09 Control Signal Not Received mean?

Replace batteries, check indoor receiver, restart heat pump, and ensure controller compatibility.

What does DAI-HP10 System Reset Required mean?

Turn off power, wait 5–10 minutes, restart system, and restore default settings if necessary.

What does DAI-HP11 Reduced Performance at Night mean?

Check temperature settings, clean filters, ensure proper airflow, and close doors and windows.

What does DAI-HP12 Unpleasant Odor From Unit mean?

Clean indoor unit and filters, remove moisture buildup, run fan mode, and check drainage system.

What does DAI-HP13 Ice Buildup on Unit mean?

Check airflow, clean filters, inspect refrigerant level, and allow defrost cycle to complete before restarting.

What does DAI-HP14 Outdoor Unit Failure mean?

Check power connection, inspect compressor operation, verify voltage supply, and contact technician if needed.

What does DAI-HP15 Electrical Trip Issue mean?

Inspect wiring, check circuit breaker, avoid overloaded circuits, and ensure stable electrical supply.

What does DAI-HP16 System Error Display mean?

Restart system, refer to error code list, clean filters, and contact service if error persists.

What does DAI-HP17 No Warm Air Output mean?

Check heating mode, clean filters, inspect refrigerant level, and ensure compressor is operating.

What does DAI-HP18 Strange Smell in Room mean?

Clean indoor unit, replace filters, check drainage system, and run ventilation mode.

What does DAI-HP19 Signal Not Received by Indoor Unit mean?

Replace remote batteries, clean IR sensor, restart system, and remove obstructions.

What does DAI-HP20 Maintenance Required mean?

Clean filters, inspect coils, check airflow system, and schedule professional maintenance service.

Important: Always disconnect power before performing repairs. Contact a qualified technician if the issue persists.