Error code11
Serial communication error between indoor and outdoor units The manual's first action is: “-Check for correct voltages at panel, condenser and evaporator. Refer to the Service Instruction manual”
- Model
- Fujitsu General 410A
- Display shows
- Serial communication error (11)
- Type
- Error code
- Source
- Manual p. 2
What 11 means
Serial communication error p. 2
Common causes
- -Check wiring from panel to condenser, condenser to evaporator. Wire nuts and splices are not recommended. p. 2
- -Serial Signal troubleshooting for further details. p. 2
- Communication Error – At Start up, evaporator and condenser are not communicating. p. 2
- Indoor unit error (indoor EEPROM abnormal) p. 2
What to do
- -Check for correct voltages at panel, condenser and evaporator. Refer to the Service Instruction manual p. 2
- (Ref. Service Tip #043-HFI Communication Check and/or "Communication Error" under "Troubleshooting by Error Code" Type in Zendesk Help Center) p. 2
- -Check wiring from panel to condenser, condenser to evaporator. Wire nuts and splices are not recommended. Check for correct voltages at panel, condenser and evaporator. Refer to the Service Tip #043-HFI Communication Check and/or "Communication Error" under "Troubleshooting by Error Code" Type in Zendesk Help Center. p. 2
- Blinking p. 2
If 11 is still not resolved
The manual gives no further instruction for this code. Open the code table in the PDF or contact Fujitsu General service.
This page summarises what the manufacturer’s manual says about 11; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Fujitsu General. Found a mistake? Report an error.