What to do if Fujitsu Air Conditioner shows serial communication error?
If a serial communication error occurs with your Fujitsu Air Conditioner, it is necessary to have the air conditioning system inspected by authorized service personnel.
General| Refrigerant | R410A |
|---|---|
| Cooling Capacity | 15, 000 BTU/h |
| Heating Seasonal Performance Factor (HSPF) | 10.0 |
| Outdoor Unit Noise Level | 49 dB(A) |
| Heating Capacity | 18, 000 BTU/h |
Controls compressor frequency based on room temp difference from set temp.
Controls compressor frequency based on room temp difference from set temp.
Controls compressor frequency based on room temp sensor for dry mode.
Automatically switches between heating, cooling, dry, and monitoring modes based on temperature.
Manages fan speed settings (AUTO, QUIET, LOW, MED, HIGH) for different modes.
Controls indoor fan speed based on room temperature in heating mode.
Regulates outdoor fan speed based on operating mode and outdoor temperature.
Adjusts vertical airflow direction for optimal air distribution in different modes.
Defines the minimum and maximum operating frequencies for the compressor.
Details the step-by-step frequency adjustment of the compressor during startup.
Outlines available timer functions: ON/OFF, Program, and Sleep timers.
Describes automatic temperature adjustments and operation stop for energy saving during sleep.
Manages EEV opening based on operating conditions for precise refrigerant flow.
Explains how to activate and use the test operation mode for system checks.
Prevents compressor restart for a specified duration after stopping for protection.
Details the switching process of the four-way valve between cooling and heating modes.
Restores operation with previous settings after a power interruption.
Allows operation control via the indoor unit body when the remote is lost or fails.
Initiates cooling operation regardless of room temperature for a set duration.
Warms the compressor before operation in cold conditions for better performance.
Maintains a minimum heating temperature level.
Optimizes operation for energy saving by adjusting target temperatures.
Specifies conditions that trigger the defrost cycle to remove frost.
Explains conditions for automatic defrosting when heating operation stops.
Protects the compressor by controlling frequency or stopping it based on discharge gas temperature.
Manages compressor frequency to prevent exceeding current limits based on outdoor temperature.
Prevents indoor coil freezing by controlling compressor frequency in cooling/dry modes.
Stops compressor and fan if outdoor heat exchanger temperature becomes excessively high.
Controls compressor frequency based on indoor heat exchanger temperature during heating.
General information on error codes and their display methods.
Explains error codes displayed on the wired remote controller and self-diagnosis.
Details LED flashing patterns for outdoor unit errors and their corresponding trouble shooting codes.
Shows error content and corresponding lamp flashing patterns for indoor unit issues.
Steps to diagnose and resolve serial communication errors involving the outdoor unit.
Guides through diagnosing and fixing communication errors between the remote controller and the indoor unit.
Outlines steps to diagnose and resolve errors related to the indoor unit's main PCB.
Details how to diagnose and resolve errors caused by a faulty room temperature sensor.
Guides through diagnosing and resolving errors related to the indoor unit's heat exchanger sensor.
Provides steps to diagnose and resolve errors related to the indoor unit's fan motor.
Outlines steps to diagnose and resolve errors related to the outdoor unit's main PCB.
Guides through diagnosing and resolving errors related to the PFC circuit in the outdoor unit.
Details steps to diagnose and resolve errors related to the IPM module in the outdoor unit.
Guides through diagnosing and resolving errors caused by a faulty discharge pipe temperature thermistor.
Outlines steps to diagnose and resolve errors related to the outdoor unit's heat exchanger sensor.
Guides through diagnosing and resolving errors caused by a faulty outdoor temperature thermistor.
Details steps to diagnose and resolve errors related to the input current sensor.
Guides through diagnosing and resolving issues related to trip detection errors.
Outlines steps to diagnose and resolve errors related to compressor motor control.
Guides through diagnosing and resolving errors related to the outdoor unit's fan motor.
Details steps to diagnose and resolve errors related to the 4-way valve.
Guides through diagnosing and resolving errors related to discharge temperature.
Provides steps to diagnose and resolve issues when the indoor unit has no power.
Guides through diagnosing and resolving issues when the outdoor unit has no power.
Details steps to diagnose and resolve issues when the unit has power but no operation.
Provides steps to diagnose and resolve issues when the unit fails to cool or heat.
Guides through diagnosing and resolving abnormal noise issues from the unit.
Details steps to diagnose and resolve water leaking issues.
Provides diagnostic methods for compressor issues and part replacement guidance.
Details connection checks and winding resistance for inverter compressors.
Outlines checks for EEV connections, coil resistance, voltage, and operation.
Provides checks for indoor fan motor rotation and resistance.
Details checks for outdoor fan motor rotation and resistance.
Explains how to set various functions for the indoor unit via the remote control.
Configures the filter cleaning reminder interval or disables the display.
Allows adjustment of the room temperature sensor reading for cooling mode.
Allows adjustment of the room temperature sensor reading for heating mode.
Enables or disables the automatic system restart after a power outage.
Selects between indoor unit or remote controller sensor for temperature control.
Configures the signal code to match the remote controller with the indoor unit.
Configures the unit to operate or stop based on external input signals.
Step-by-step guide to change function settings using the wireless remote controller.
Explains how to set custom signal codes for the remote controller.
Provides resistance values for room and heat exchanger thermistors at various temperatures.
Lists resistance values for discharge, heat exchanger, and outdoor thermistors.
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