Fujitsu AUXB04GALH Service Manual page 173

Trouble shooting 95
Error Contents :
Incompatible Indoor Unit is
Connected
Details :
Condition of occurrence : When information was not obtained from indoor unit
Release condition : When information was obtained from indoor unit
Cause 1 : Check remote controller master/slave setting.
For the check and modification methods, refer to the remote controller (including external
SW) installation manual.
When there is 1 remote controller, check whether or not it is set as the master remote
controller.
When there are 2 remote controllers, check if one side is the master remote controller and
the other side is the slave remote controller.
When there are 1 remote controller and 1 external switch controller, check if the remote
controller is master controller and the external switch controller is slave controller.
OK
Cause 2 : Check connection
Check cable
Check indoor unit power supply
OK
Cause 3 : Noise
Source around cable
OK
Cause 4 : Remote controller trouble
Replace remote controller.
OK
Cause 5 : Indoor unit PCB trouble
Change Controller PCB and set up the original address.
Symptom :
Error Code display [ 1 5 ]
or unit
04-103