What to do if my Samsung AC BXU CH displays error E203?
- JJacqueline SimpsonSep 23, 2025
If your Samsung Air Conditioner displays error code E203, check the electrical connection and setting between the outdoor unit MAIN PBA and the INVERTER PBA.

What to do if my Samsung AC BXU CH displays error E203?
If your Samsung Air Conditioner displays error code E203, check the electrical connection and setting between the outdoor unit MAIN PBA and the INVERTER PBA.
What to do if my Samsung Air Conditioner displays error E407?
If your Samsung Air Conditioner displays error code E407, you should check the refrigerant pipe line for blockage, inspect the high pressure sensor, and verify the refrigerant amount.
What to do if my Samsung Air Conditioner displays error E464?
If your Samsung Air Conditioner is showing error code E464, you should: 1. Check if the service valve is open. 2. Check the state of the refrigerant. 3. Check if the connecting wire and the pipe are OK. 4. Check the compressor.
What to do if my Samsung AC BXU CH Air Conditioner displays error E416?
If your Samsung Air Conditioner displays error code E416, you should check the refrigerant amount, the EEV (Electronic Expansion Valve), the service valve for blockages, and inspect the discharge temperature sensor for defects.
What to do if my Samsung AC BXU CH Air Conditioner displays error E534?
If your Samsung Air Conditioner is showing error code E534, you should: 1. Check if the service valve is open. 2. Check for any blockage on the refrigerant cycle (indoor unit/outdoor unit). 3. Check the EEV connection and operation. 4. Check if connecting wire and the pipe are OK. 5. Check the compressor. 6. Check the troubleshooting of E464, 465 as well.
What to do if my Samsung AC BXU CH Air Conditioner displays error E470?
If your Samsung Air Conditioner displays error code E470, you should check the outdoor EEPROM data.
What to do if my Samsung AC BXU CH displays error E308?
If your Samsung Air Conditioner displays error code E308, you should check the SUCTION sensor for a short or open circuit.
What to do if my Samsung AC BXU CH displays error E291?
If your Samsung Air Conditioner displays error code E291, while the compressor is operating, check for a short error (less than 0.4v) or an open error (over 4.2v).
What to do if my Samsung Air Conditioner displays error E467?
If your Samsung Air Conditioner displays error code E467, you should check the compressor wire.
What to do if my Samsung AC BXU CH displays error E466?
If your Samsung Air Conditioner displays error code E466, you should check AC Power and DC Link Voltage.
| Series | BXU CH Series |
|---|---|
| Cooling Capacity | 18000 BTU/h |
| Noise Level (Outdoor Unit) | 52 dB |
| Power Supply | 220-240V, 50Hz |
| Features | Sleep Mode |
General safety guidelines and specific California warning for safe operation.
Crucial safety measures for installing the unit, including electrical and physical safety.
Guidelines for selecting an optimal and safe location for outdoor unit installation.
Details on outdoor unit dimensions, clearances, and factors like snow and sea breeze.
Procedures for fixing the unit, connecting power and communication cables, and managing conduits.
Instructions for connecting refrigerant pipes, determining diameters, and performing brazing with nitrogen flushing.
Steps for vacuum drying the system, leak testing, and adjusting the refrigerant charge.
Guidance on insulating refrigerant pipes, managing water drainage, and performing final checks and trial operation.
Manual configuration of outdoor unit options, addresses, and operating modes.
Procedure for safely recovering refrigerant from the system for maintenance or relocation.
Instructions for operating stop valves and installing wind baffles for unit protection.
Comprehensive list of error codes with meanings and troubleshooting steps for diagnosing issues.











