Samsung split air conditioner E series error codes

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 cable between indoor unit and outdoor unit.
• Verify printed circuit board power.

Problem

Indoor Room Sensor Open/Short

Causes

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

Fix

• Check room temperature sensor resistance (~10K at 25°C).

Problem

Indoor Pipe Sensor Open/Short

Causes

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

Fix

• Check pipe sensor and wiring.
• Expected resistance ~5K at 25°C.

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 fan motor winding and hall sensor signal.

Problem

Indoor EEPROM Error

Causes

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

Fix

• Replace indoor printed circuit board.

Problem

Outdoor 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 current draw.

Problem

Outdoor Pipe 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 outdoor pipe sensor and connection.

Problem

High Pressure Protection

Causes

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

Fix

• Check refrigerant pressure, clean condenser, verify fan operation.