AUX FREEDOM Series - User Manual

Questions and Answers

B
Brian CarrSep 12, 2025
What causes a compressor top head sensor error in my AUX Air Conditioner?
- B
  Brett MccarthySep 12, 2025
  If your AUX Air Conditioner displays a compressor top head sensor error, first check if the compressor top head temperature is too high (above 110°C) and causes action of the compressor top head sensor. After excluding the possibility of the system problem, please note that the temperature protection switch is closed normally. Check if the sensor wire or the sensor connecting wire is damaged and if the connecting terminal is connected firmly. Disconnect the power supply and short circuit a metal with the compressor top head terminal of the Outdoor Unit main PCB. The compressor top head sensor is a compressor top head temperature protection switch that keeps closed when the compressor temperature is normal.
R
Ryan LynnSep 10, 2025
How do I troubleshoot an exhaust sensor error on my AUX Air Conditioner?
- J
  juliejamesSep 10, 2025
  If your AUX Air Conditioner displays an exhaust sensor error, check if there is any evident resistance problem in the sensor. Check if the sensor wire or the sensor connecting wire is damaged. Check if the connecting terminal is connected firmly and whether the sensor is affected with damp. If there is no standard sensor at hand, exchange the exhaust sensor with the one beside it to see if the error changes. The Outdoor Unit main PCB will indicate “exhaust sensor error” and send it to the Indoor Unit main PCB when it detects short circuit or open circuit of the exhaust sensor.
S
Savannah Chapman DVMSep 8, 2025
Why does my AUX FREEDOM Air Conditioner show a compressor out-of-step error?
- C
  Cindy SheltonSep 8, 2025
  If your AUX Air Conditioner displays a compressor out-of-step error, check if the order of compressor wires is not correct, which makes the compressor rotate reversely. Also, check if the supply voltage is unstable and highly volatile. If “compressor out-of-step error” will be indicated immediately after starting up, observe if there is any component destroyed. The module panel will constantly test the current of lead wires of the compressor and calculate the position of the rotator.
A
allencarlsonSep 6, 2025
What does PFC protection error mean on my AUX FREEDOM Air Conditioner?
- J
  Joseph HoltSep 6, 2025
  If your AUX Air Conditioner displays a PFC protection error, check if the supply voltage is unstable and highly volatile or the voltage is too low (below AC 135V). The reactor is one of core parts of PFC, so check if the reactor itself is destroyed. If “PFC protection error” will be indicated immediately after starting up, observe if there is any component destroyed. The PFC board is a component of the inverter air conditioner for power factor correction and voltage boosting.
S
Sara PerezSep 5, 2025
What causes a module protection error in my AUX FREEDOM?
- W
  William WheelerSep 5, 2025
  If your AUX Air Conditioner displays a module protection error, check if the order of compressor wires is not correct, which makes the compressor rotate reversely. Also, check if the supply voltage is unstable and highly volatile. If “module protection error” will be indicated immediately after starting up, observe if there is any component destroyed. The power module is the part to directly drive the compressor to work.
S
Steven JacksonSep 3, 2025
How do I resolve an Outdoor Unit DC motor error (3-core terminal motor) on my AUX FREEDOM Air Conditioner?
- M
  mcdonaldryanSep 3, 2025
  If your AUX Air Conditioner displays an Outdoor Unit DC motor error (3-core terminal motor), first exclude the possibility of mechanical jam of Outdoor Unit motor blades. Also, observe if the terminal of the motor is not connected firmly or the order of lead wires is correct. If the problem persists, replace the Outdoor Unit main PCB before maintenance; if the problem persists, replace the Outdoor DC motor. The main PCB will indicate “Outdoor Unit DC motor error” when it detects imbalanced current on the three lead wires of the driving motor.
V
Virginia BranchSep 1, 2025
What does an Indoor EE Failure mean on my AUX Air Conditioner, and how can I fix it?
- J
  jenna15Sep 2, 2025
  If your AUX Air Conditioner displays an Indoor EE Failure, replace the Indoor Unit main PCB directly, as many parameters need to be preset for the running of the indoor unit of the air conditioner.
A
ashley20Aug 31, 2025
What to do if my AUX FREEDOM Air Conditioner has an Indoor Unit and Outdoor Unit communication error?
- H
  hicksdonaldAug 31, 2025
  To troubleshoot a communication error between the Indoor and Outdoor Units of your AUX Air Conditioner, consider the following: * Check if the Outdoor Unit can power on and work. * Ensure the Indoor and Outdoor Units are matched and the phase sequence of connecting wires is correct. * Verify connecting wires are properly attached. Consider Indoor Unit main PCB replacement or Outdoor Unit main PCB replacement. * Confirm AC 220V can be delivered to the terminal block of the Outdoor Unit. * Check if the bridge rectifier and module panel generate DC 310V. * Verify the Outdoor Unit main PCB generates a low voltage power supply of DC 5V. * Check if the Outdoor Unit main PCB shows the status of periodical reset.

AUX FREEDOM Series Specifications

General

Power Supply	220-240V, 50Hz
Type	Split
Energy Efficiency Class Heating	A
Features	Auto Restart, Sleep Mode
Operating Temperature Range (Cooling)	18°C to 43°C

Summary

Technical Information

Summary

Overview of the product series.

Appearance

Visual representation of indoor and outdoor units.

Model List

Catalog of available models for the series.

Product Dimensions

Indoor Unit Dimensions

Detailed drawings with measurements for indoor units.

Outdoor Unit Dimensions

Detailed drawings with measurements for outdoor units.

Specifications and Controls

Specification Sheet

Comprehensive technical data for different models.

Function and Control

Explanation of unit operations and remote controller functions.

Operation Modes

Instructions for Cooling, Heating, Fan, and Drying modes.

Battery Use and Replacement

Guide on how to install and replace remote control batteries.

System Diagrams and Electrical

Refrigerant System Diagram (Cooling Only)

Diagram and cycle explanation for cooling-only operation.

Refrigerant System Diagram (Cooling & Heating)

Diagram and cycle explanation for cooling and heating operation.

Heating Mode and Cycle

Diagram and cycle explanation for heating operation.

Indoor Unit Wiring Diagram

Electrical wiring diagram for the indoor unit.

Outdoor Unit Wiring Diagrams

Electrical wiring diagrams for outdoor units of different capacities.

Installation and Maintenance

Tools for Installation and Maintenance

Images and names of essential tools for installation and servicing.

Installation Notes

Important notices, requirements for position, height, structure, and electrical safety.

Indoor Unit Installation

Steps for installing the indoor unit, including parts check and location selection.

Indoor Unit Mounting and Piping

Procedures for mounting plate, wall-through hole, and pipeline routing.

Indoor Unit Connections and Fixing

Details on drain pipe, piping wrap, unit fixing, and electrical connection.

Outdoor Unit Installation

Steps for installing the outdoor unit, including parts and location.

Outdoor Unit Connections

Procedures for connecting pipes, wiring, and refrigerant.

Wiring Diagrams and Air Expelling

Wiring diagrams and refrigerant discharging procedure.

Post-Installation Checks

Electrical safety, installation security, water drain, and leak test procedures.

Test Operation

Procedures for test operation, including preparation and method.

Troubleshooting

Troubleshooting Guide and Error Index

General index of error codes and their reference codes.

Error Code Explanation Structure

Outlines how error codes are explained, including cause and inspection.

E0: Indoor Unit Overcurrent Protection

Explains E0 error, cause, tools, and troubleshooting steps.

E1: Indoor Unit Temperature Sensor Error

Explains E1 error, cause, tools, and troubleshooting steps.

E2: Outdoor Unit Coil Sensor Error

Explains E2 error, cause, tools, and troubleshooting steps.

E3: Indoor Unit Coil Sensor Error

Explains E3 error, cause, tools, and troubleshooting steps.

E4: Indoor Unit Motor Error (PG Motor)

Explains E4 error for PG motor, cause, tools, and troubleshooting.

E4: Indoor Unit Motor Error (DC Motor)

Explains E4 error for DC motor, cause, tools, and troubleshooting.

E5: Communication Error

Explains E5 error, cause, tools, and troubleshooting steps.

Eb: Indoor EE Failure

Explains Eb error, cause, tools, and troubleshooting steps.

F0: Outdoor Unit DC Motor Error

Explains F0 error for 3-core DC motor, cause, tools, and troubleshooting.

F1: Module Protection Error

Explains F1 error, cause, tools, and troubleshooting steps.

F2: PFC Protection Error

Explains F2 error, cause, tools, and troubleshooting steps.

F3: Compressor Out-of-Step Error

Explains F3 error, cause, tools, and troubleshooting steps.

F4: Exhaust Sensor Error

Explains F4 error, cause, tools, and troubleshooting steps.

F5: Compressor Top Head Sensor Error

Explains F5 error, cause, tools, and troubleshooting steps.

F6: Outdoor Unit Temperature Sensor Error

Explains F6 error, cause, tools, and troubleshooting steps.

F7: OVP or UVP Error

Explains F7 error, cause, tools, and troubleshooting steps.

F8: Main PCB & Module Panel Communication Error

Explains F8 error, cause, tools, and troubleshooting steps.

F9: Outdoor EE Error

Explains F9 error, cause, tools, and troubleshooting steps.

FA: Recirculated Sensor Error

Explains FA error, cause, tools, and troubleshooting steps.

P2: High-Pressure Protection

Explains P2 error, cause, tools, and troubleshooting steps.

P3: Liquid Deficiency Protection

Explains P3 error, cause, tools, and troubleshooting steps.

P4: Refrigeration Overload Protection

Explains P4 error, cause, tools, and troubleshooting steps.

P5: Exhaust Protection

Explains P5 error, cause, tools, and troubleshooting steps.

P6: Indoor High Temperature Protection

Explains P6 error, cause, tools, and troubleshooting steps.

P7: Anti-freezing Protection

Explains P7 error, cause, tools, and troubleshooting steps.

P8: Overcurrent Protection

Explains P8 error, cause, tools, and troubleshooting steps.

Function Protection Prompts

Explains various function protection prompts and their causes.

Category-L Failures Troubleshooting

Lists Category-L failures and primary troubleshooting parts.

Outdoor Unit Indicator Light Error Codes

Table showing LED indicators and corresponding error codes.

Foremost Inspecting Items

Checks for input voltage, cord connection, and other common non-error issues.

No Power Display Diagnosis

Troubleshooting steps for a unit with no power display.

Indoor Motor Not Working Diagnosis

Troubleshooting steps when the indoor motor does not operate.

Outdoor Unit Not Working Diagnosis

Troubleshooting steps when the outdoor unit does not operate.

Step Motor Not Working Diagnosis

Troubleshooting steps for the step motor controlling louvers.

Heating Mode No Hot Air Diagnosis

Troubleshooting steps when heating mode doesn't produce hot air.

Remote Control Not Working Diagnosis

Troubleshooting steps for a non-functional remote control.

Removal Procedures

Indoor Unit Removal

Step-by-step guide for disassembling the indoor unit.

Outdoor Unit Removal

Step-by-step guide for disassembling the outdoor unit.

Appendix

Sensor R-T Analysis Table (15 K)

Table correlating temperature sensor resistance and MCU input voltage.

Sensor R-T Analysis Table (50 K)

Table correlating temperature sensor resistance and MCU input voltage.

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AUX FREEDOM Series - User Manual

Table of Contents

Questions and Answers

AUX FREEDOM Series Specifications

Summary

Technical Information

Summary

Appearance

Model List

Product Dimensions

Indoor Unit Dimensions

Outdoor Unit Dimensions

Specifications and Controls

Specification Sheet

Function and Control

Operation Modes

Battery Use and Replacement

System Diagrams and Electrical

Refrigerant System Diagram (Cooling Only)

Refrigerant System Diagram (Cooling & Heating)

Heating Mode and Cycle

Indoor Unit Wiring Diagram

Outdoor Unit Wiring Diagrams

Installation and Maintenance

Tools for Installation and Maintenance

Installation Notes

Indoor Unit Installation

Indoor Unit Mounting and Piping

Indoor Unit Connections and Fixing

Outdoor Unit Installation

Outdoor Unit Connections

Wiring Diagrams and Air Expelling

Post-Installation Checks

Test Operation

Troubleshooting

Troubleshooting Guide and Error Index

Error Code Explanation Structure

E0: Indoor Unit Overcurrent Protection

E1: Indoor Unit Temperature Sensor Error

E2: Outdoor Unit Coil Sensor Error

E3: Indoor Unit Coil Sensor Error

E4: Indoor Unit Motor Error (PG Motor)

E4: Indoor Unit Motor Error (DC Motor)

E5: Communication Error

Eb: Indoor EE Failure

F0: Outdoor Unit DC Motor Error

F1: Module Protection Error

F2: PFC Protection Error

F3: Compressor Out-of-Step Error

F4: Exhaust Sensor Error

F5: Compressor Top Head Sensor Error

F6: Outdoor Unit Temperature Sensor Error

F7: OVP or UVP Error

F8: Main PCB & Module Panel Communication Error

F9: Outdoor EE Error

FA: Recirculated Sensor Error

P2: High-Pressure Protection

P3: Liquid Deficiency Protection

P4: Refrigeration Overload Protection

P5: Exhaust Protection

P6: Indoor High Temperature Protection

P7: Anti-freezing Protection

P8: Overcurrent Protection

Function Protection Prompts

Category-L Failures Troubleshooting

Outdoor Unit Indicator Light Error Codes

Foremost Inspecting Items

No Power Display Diagnosis

Indoor Motor Not Working Diagnosis

Outdoor Unit Not Working Diagnosis

Step Motor Not Working Diagnosis

Heating Mode No Hot Air Diagnosis

Remote Control Not Working Diagnosis

Removal Procedures

Indoor Unit Removal

Outdoor Unit Removal

Appendix

Sensor R-T Analysis Table (15 K)

Sensor R-T Analysis Table (50 K)

Related product manuals