Sharp Air Conditioner Error Codes

Complete Sharp Air Conditioner Guide

This guide explains all Sharp Air Conditioner error codes (CH series) with simple troubleshooting steps to help you identify and fix common issues safely before calling a technician.

E1
Indoor Sensor Fault
  • Check room temperature sensor connection.
  • Inspect sensor wiring for damage or corrosion.
  • Test thermistor resistance values.
  • Replace sensor if readings are abnormal.
E2
Outdoor Sensor Fault
  • Inspect outdoor temperature sensor wiring.
  • Check sensor placement and insulation.
  • Test resistance with multimeter.
  • Replace sensor if defective.
E3
Compressor Overload Protection
  • Turn off unit and allow compressor to cool.
  • Check refrigerant pressure and airflow.
  • Clean condenser coils thoroughly.
  • Inspect relay and capacitor condition.
E4
Fan Motor Error
  • Check fan blades for obstruction or dust buildup.
  • Inspect fan motor wiring connections.
  • Test fan motor operation manually.
  • Replace motor if it fails to spin.
E5
Temperature Detection Fault
  • Allow unit to stabilize at correct temperature.
  • Check indoor environment conditions.
  • Ensure sensors are properly installed.
  • Restart system after 10–15 minutes.
E6
Refrigerant System Fault
  • Inspect for refrigerant leakage signs.
  • Check system pressure levels.
  • Ensure cooling performance is stable.
  • Recharge refrigerant if required by technician.
E7
Overcurrent Protection Activated
  • Check power supply voltage stability.
  • Inspect wiring for short circuits.
  • Ensure compressor is not overloaded.
  • Reset system after correction.
E8
PCB Communication Failure
  • Restart air conditioner system.
  • Check wiring harness connections.
  • Inspect PCB terminals for looseness or corrosion.
  • Replace control board if communication fails.
E9
Indoor–Outdoor Communication Error
  • Turn off power and restart system.
  • Inspect communication cable between units.
  • Check for wiring damage or disconnection.
  • Replace PCB if signal is not restored.
E10
Low Voltage Protection
  • Check main power supply stability.
  • Avoid using extension cords.
  • Inspect circuit breaker condition.
  • Restart when voltage stabilizes.
E11
High Voltage Protection
  • Check electrical supply fluctuations.
  • Use voltage regulator if needed.
  • Inspect power line for instability.
  • Restart after voltage normalizes.
E12
EEPROM Memory Error
  • Power cycle the air conditioner.
  • Inspect main control board for damage.
  • Check memory IC connection.
  • Replace PCB if error persists.
E13
Evaporator Sensor Fault
  • Check evaporator sensor wiring.
  • Inspect coil for ice buildup.
  • Test sensor resistance values.
  • Replace sensor if faulty.
E14
Condenser Fan Error
  • Check fan motor for blockage.
  • Inspect wiring connections.
  • Clean dust and debris from blades.
  • Replace fan motor if not working.
E15
System Overheat Protection
  • Turn off unit immediately.
  • Clean filters and airflow passages.
  • Ensure proper ventilation around unit.
  • Restart after full cooldown.

Frequently Asked Questions


Why does my Sharp Air Conditioner show ERR or system error messages?
ERR messages usually indicate communication faults, sensor errors, refrigerant system issues, airflow restrictions, or control board malfunctions. Turn off the unit, disconnect power, wait a few minutes, then restart. Check filters, wiring connections, and ensure stable power supply.
Why does my Sharp Air Conditioner stop cooling during operation?
This is often caused by compressor overload, dirty filters, blocked airflow, refrigerant issues, or overheating protection. Turn off the unit, clean filters and vents, allow it to cool, then restart.
Why does my Sharp Air Conditioner not turn on?
Check the power outlet, circuit breaker, remote batteries, and power cable. Ensure stable voltage supply. If unresponsive, perform a full power reset by disconnecting power for several minutes.
Why does my Sharp Air Conditioner not cool properly?
Weak cooling may be caused by low refrigerant, dirty condenser coils, blocked airflow, or faulty sensors. Clean filters, ensure proper ventilation, and check temperature settings.
Why does my Sharp Air Conditioner make unusual noises?
Unusual sounds may come from loose fan blades, debris inside the unit, compressor strain, or vibration issues. Turn off the system and inspect airflow and mounting stability.
Why does my Sharp Air Conditioner leak water?
Water leakage is usually caused by clogged drain lines, blocked filters, or improper installation. Clean the drain pipe and ensure the unit is level.
Why does my Sharp Air Conditioner smell bad when running?
Bad odors are often caused by mold buildup, dirty filters, or stagnant water in the drainage system. Clean filters and drain lines regularly.
Why does my Sharp Air Conditioner freeze up?
Ice buildup may be caused by restricted airflow, dirty filters, low refrigerant, or sensor malfunction. Turn off the unit and allow it to defrost completely before restarting.
Why does my Sharp Air Conditioner keep shutting off randomly?
Random shutdowns are often caused by overheating protection, unstable power supply, or sensor faults. Check airflow, clean filters, and ensure stable voltage.
How do I reset my Sharp Air Conditioner system messages?
Turn off the air conditioner and disconnect power for 5–10 minutes. Reconnect and restart the unit to clear temporary system errors and reset controls.
Why does my Sharp Air Conditioner lose airflow strength?
Reduced airflow is usually caused by clogged filters, blocked vents, or dirty evaporator coils. Clean all filters and ensure nothing is obstructing airflow paths.
When should I service my Sharp Air Conditioner?
Service is recommended if cooling is weak, error messages persist, water leakage continues, unusual noises occur, or the unit frequently shuts down.
Important: Sharp Air Conditioner system messages are safety features designed to protect internal components such as the compressor, sensors, fans, and control board. If issues continue after troubleshooting, stop using the unit and contact an authorized Sharp service center.