Indoor / Outdoor Unit Error - Fujitsu Airstage V-II Service Manual

Trouble shooting 89
Error Contents :
Software Error
Details :
Condition of occurrence : Micon program performed an abnormal control.
Error of inside information of EEPROM.
initial setting of Network Converor PCB was not normally performed.
Release condition : Micon has been reset, and the control of Network Convertor became normal.
When error disappeared and Network Convetor becomes available to control.
Cause 1 : External noise
Check continuation of error.
(1) If error is released automatically, it is not a defect of PCB. Remove the surrounding noise source around Network Convertor.
(2) If error is not released automatically, check followings.
OK
After pressing SW104 of Network Convertor PCB for 5 seconds or turning on power.
Does error code display reappear?
YES
Remove the surrounding noise source.
OK
Cause 2 : Network Convertor is defective.
Replace Network Convertor.
Trouble shooting 90
Error Contents :

Indoor / Outdoor Unit Error

Details :
Condition of occurrence : When error occurred on Indoor/Outdoor unit that is connected to Network Convertor.
Release condition : When the error of Indoor/Outdoor unit that is connected to Network Convertor is released.
Cause 1 : Error occurred in Indoor unit
Refer to Indoor Unit trouble shooting.
(Removal of error of indoor unit connected to network converter)
Cause 2 : Error occurred in Outdoor unit
Refer to Outdoor Unit trouble shooting.
(Removal of error of outdoor unit connected to network converter)
Symptom :
Error Code display [ C A ]
All the control items do not operate.
Other Controls are left they are.
It is not a defect of PCB. Remove the surrounding noise source.
Symptom :
Error Code display [ 5 U ]
Other controls are left as they are.
OK
NO
04-87