1. External Switch Controller (UTY-TEKX)
Error Contents :
Power Supply Error
Symptom :
No operation & LED does not light up.
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.
OK
Cause 2 : Connection cable is defective or open.
Check installation of connection cable.
Check if connection cable is open.
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.
OK
Cause 4 : Ext. Switch Controller is defective.
Replace External Switch Controller.
OK
Trouble shooting 73
4-3-4 Trouble Shooting for Optional Parts
04-81
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