Royal Clima Air Conditioners Error Codes

E0

Indoor unit does not respond to remote, display shows E0 and unit will not start cooling or heating.

Indoor Unit EEPROM / Main PCB Communication Error

E1

Indoor unit stops shortly after starting, display shows E1, outdoor unit does not run.

Indoor–Outdoor Communication Failure

E2

Indoor unit runs briefly then stops, display shows E2, airflow may be weak or irregular.

Indoor Evaporator Coil Freeze Protection / Anti-freeze Sensor Fault

E3

Outdoor unit stops, indoor unit may show E3 and cooling/heating stops unexpectedly.

Outdoor Unit Overcurrent / Compressor Overload Protection

E4

Unit stops during operation, indoor display shows E4, sometimes after long cooling cycles.

High Discharge Temperature / Compressor Overheating

E5

Indoor unit shows E5 and stops; sometimes the outdoor unit does not start at all.

Overvoltage / Undervoltage Protection or Power Supply Error

E6

Indoor unit shows E6, compressor may not start or stops shortly after starting.

Compressor Start Failure / Inverter Drive Fault

E7

Indoor unit shows E7, louver may not move correctly or airflow direction cannot be adjusted.

Indoor Louver Motor / Stepper Motor Fault

E8

Indoor unit shows E8, unit may stop and restart frequently, sometimes with reduced airflow.

Indoor Fan Motor Fault / Overload

E9

Indoor unit shows E9, sometimes accompanied by water leakage or unit stopping in cooling mode.

Full Drain Pan / Water Level Sensor Fault (if equipped)

F0

Indoor unit shows F0 and stops cooling; may occur shortly after startup.

Refrigerant Undercharge / Low Pressure Protection

F1

Indoor unit shows F1, unit may run but with poor temperature control.

Indoor Ambient Temperature Sensor (Room Sensor) Fault

F2

Indoor unit shows F2, unit may stop in heating mode or show unstable operation.

Indoor Evaporator Temperature Sensor Fault

F3

Indoor unit shows F3, heating performance is poor or unit stops in HEAT mode.

Outdoor Coil Temperature Sensor Fault

F4

Indoor unit shows F4, unit may stop in both cooling and heating modes.

Discharge Pipe Temperature Sensor Fault

F5

Indoor unit shows F5, outdoor fan may not run or runs erratically.

Outdoor Fan Motor Fault

F6

Indoor unit shows F6, unit may run at reduced capacity or stop intermittently.

Compressor Current Sensing / IPM Protection Fault

H0

Indoor unit shows H0, unit may not start or may operate only in fan mode.

EEPROM Parameter Error / Configuration Fault

H1

Indoor unit shows H1 and no warm air is produced at the beginning of heating mode.

Defrost / Preheating Indication (Protection Mode)

H2

Indoor unit shows H2, heating stops and may resume after some time.

High Temperature Protection in Heating / Overheat Protection

H3

Indoor unit shows H3, unit stops and may not restart until power is cycled.

Compressor Overload Protection / Overheat

H4

Indoor unit shows H4, unit may not respond to mode changes or may shut down unexpectedly.

Indoor–Outdoor Mismatch / Mode Conflict or EEPROM Error

H5

Indoor unit shows H5, unit may not start or may shut down shortly after starting.

IPM (Intelligent Power Module) Protection / Inverter Module Fault

P0

Indoor unit shows P0, compressor may not start or runs at very low capacity.

Inverter Module Protection / DC Bus Voltage Error

P1

Indoor unit shows P1, unit may stop during operation, especially under heavy load.

High or Low AC Voltage Protection

P2

Indoor unit shows P2, unit may stop cooling or heating intermittently.

Compressor Temperature Protection / Overheat

P3

Indoor unit shows P3, unit may limit capacity or shut down under extreme conditions.

Outdoor Low Temperature Protection / Anti-freeze in Heating

Symptom

Air conditioner does not turn on at all, no lights on indoor unit, remote has no effect.

No Power to Indoor Unit

Symptom

Burning or electrical smell from indoor or outdoor unit during operation.

Overheating Electrical Components

Symptom

Indoor unit blows air but there is frost or ice forming on the indoor coil or copper pipes.

Evaporator Icing

Symptom

Indoor unit fan does not run, but display is on and compressor may start (outdoor unit runs).

Indoor Fan Not Running

Symptom

Indoor unit frequently turns on and off (short cycling) without reaching set temperature.

Short Cycling / Incorrect Thermostat Sensing

Symptom

Loud rattling, buzzing, or grinding noise from indoor unit during operation.

Indoor Unit Mechanical Noise

Symptom

Loud vibration or humming from outdoor unit, sometimes transmitted into the building.

Outdoor Unit Vibration / Mounting Issue

Symptom

Outdoor fan runs but compressor does not start; no cooling or heating.

Compressor Not Starting

Symptom

Outdoor unit ices up completely in heating mode and does not defrost properly.

Defrost System Malfunction

Symptom

Poor cooling performance: room does not reach set temperature, long run times, weak cold air.

Insufficient Cooling Capacity / Performance Degradation

Symptom

Remote control does not operate the unit, but indoor display has power.

Remote Control / IR Receiver Failure

Symptom

Unit does not heat properly in HEAT mode, blows lukewarm or cold air.

Insufficient Heating Performance

Symptom

Unit powers on but compressor and outdoor fan do not start; only indoor fan runs and no cooling or heating occurs.

Outdoor Unit Not Starting

Symptom

Unpleasant musty or moldy smell from indoor unit when it starts.

Microbial Growth on Evaporator and Drain Pan

Symptom

Water dripping from outdoor unit during heating or cooling, appearing excessive to the user.

Outdoor Condensate / Defrost Water Discharge

Symptom

Water dripping from the front of the indoor unit or down the wall during cooling.

Indoor Unit Water Leakage