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2. Troubleshooting with error code

2-1. E: 11. Serial communication error (Serial reverse transfer

error) (Outdoor unit)

Indicator Indoor unit

Operation indicator 1 time flash

Timer indicator 1 time flash

Economy indicator Continuous flash

Error code E: 11

Detective actuator Outdoor unit

Main PCB When the indoor unit cannot receive the serial signal

from outdoor unit more than 2 minutes after power on,

or the indoor unit cannot receive the serial signal more

than 15 seconds during normal operation.

Fan motor

Forecast of cause

Connection failure

External cause

Main PCB failure

Outdoor unit fan motor failure

Check point 1. Reset the power and operate

Does error indication show again?

→ If no, go to "Check point 1-2".

↓

Check point 2. Check connection

Check any loose or removed connection line of indoor unit and outdoor unit.

Check connection condition is control unit. (If there is loose connector, open cable or mis-wiring.)

→ If there is an abnormal condition, correct it by referring to the installation manual or the “DESIGN

& TECHNICAL MANUAL”.

↓

Check point 3. Check the voltage of power supply

Check the voltage of power supply

Check if AC 270 V (AC 230 V -10%) to AC 253 V (AC 230 V +10%) appears at

outdoor unit terminal L — N.

↓

2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) - (03-2) - 2. Troubleshooting with error code

TROUBLESHOOTING

Fujitsu AOYG09KHCAN User Manual

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