Trouble Shooting For Optional Parts; External Switch Controller (Uty-Tekx); The Abnormality In Connection Of Remote Controller Cable - Fujitsu Airstage V-II Service Manual

4-3-3 Trouble Shooting for Optional Parts

1. External Switch Controller (UTY-TEKX)

Trouble shooting 69
Error Contents :
Power Supply Error
Condition :
1. No power supply.
Voltage error between red and black terminals of External Switch Controller. (Normal voltage: 12V plus minus 10%)
2. Electric circuit error.
Voltage is normal between red and black terminals of External Switch Controller (Normal voltage: 12V plus minus 10%)
Cause 1 : Indoor unit defective
Refer to Indoor unit trouble shooting.
Cause 2 : Connection cable is defective or open.
Check installation of connection cable.
Check if connection cable is open.
Trouble shooting 70
Error Contents :
The abnormality in connection
of remote controller cable
Condition :
Communication with Indoor unit has been cut off for longer than 1 minute.
Cause 1 :
Communication cable is defective or open.
Check installation of connection cable.
Check if connection cable is open.
Cause 2 : Defective insertion or open
connection of the cable between External
Switch Controller terminal and PCB.
Check connector insertion.
Check if connection cable is open.
Cause 3 : DIP switch setting defective
Check setting of DIP-SW1-4, 1-5, 1-6.
Symptom :
No operation & LED does not light up.
OK
Symptom :
LED repeats flashing 0.5sec ON & 0.5sec OFF.
OK
OK
Cause 3 : Defective insertion or open
connection of the cable between External
Switch Controller terminal and PCB.
Check connector insertion.
Check if connection cable is open.
Cause 4 : Ext. Switch Controller is defective.
OK
Replace External Switch Controller.
Cause 4 : External noise
Remove or shut out external noise source.
Cause 5 : Ext. Switch Controller is defective.
Replace External Switch Controller.
OK
04-75
OK
OK