Daikin split air conditioner error codes

Problem

Safety Device Activated

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check all safety devices.
• Reset and monitor.

Problem

Indoor printed circuit board Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check indoor printed circuit board connections.
• Replace printed circuit board if needed.

Problem

High Pressure Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check gas pressure, condenser fan, and clean condenser.

Problem

Low Pressure Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check gas level and look for leaks.

Problem

Compressor Overload

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check compressor winding, capacitor, and power supply.

Problem

Outdoor Fan Motor Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check outdoor fan motor and capacitor.

Problem

Indoor Fan Motor Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check indoor fan motor and printed circuit board connection.

Problem

Electronic Expansion Valve Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check electronic expansion valve coil and wiring to outdoor printed circuit board.

Problem

Discharge Pipe Temp High

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check gas charge, filter, and compressor health.

Problem

Outdoor Ambient Sensor Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check ambient temp sensor and connections.

Problem

Indoor Position Sensor Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check position detection sensor on compressor.

Problem

Current transformer sensor error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check the current transformer on the outdoor printed circuit board.

Problem

Discharge Thermistor Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check discharge pipe thermistor and wiring.

Problem

Heat Exchanger Thermistor Error

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check heat exchanger sensor connections.

Problem

Inverter Fin Temperature Rise

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check heat sink and clean outdoor unit.

Problem

Low Refrigerant

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check for leaks and recharge refrigerant.

Problem

Communication Error (indoor unit-outdoor unit)

Causes

The control system is reporting this fault. Use the checks below to narrow down wiring, sensors, supply, or mechanical issues.

Fix

• Check communication wire.
• Verify connectors on both printed circuit boards.