20
Note:Refer to the manual of outdoor unit for the detail of remote
controller.
(1)Upward/downwardvane
performance failure
Thevane is not downward during defrosting and heat
preparationand when the thermostat is OFF in HEAT
mode.(Working of COOL protection function)
Vanemotor does not rotate.
• Defective vane motor
• Breaking of wire or connection failure of connector
Upward/downwardvane does not work.
• The vane is set to fixed position.
Normaloperation (The vane is set to
horizontalregardless of remote control.)
Check (left).
• Check the vane motor.(Refer to “How
tocheck the parts”.)
• Check for breaking of wire or connec-
tionfailure of connector.
Normaloperation (Each connector on
vanemotor side is disconnected or set-
tingthe fixed vanes by wired remote
controller.)
Phenomena Cause Countermeasure
(2)Receiverfor I R wireless remote
controller
Weakbatteries of I R wireless remote controller
Contactfailure of connector (CNB) on I R wireless
remotecontroller board
(Insertfailure)
Contactfailure of connector (CN90) on indoor con-
trollerboard (Insert failure)
Contactfailure of connector between I R wireless
remote controllerboard andindoor controllerboard
Replacebatteries of I R wireless remote
controller.
~
Checkcontact failure of each connector.
Ifno problems are found of connector,
replaceindoor controller board.
When the same trouble occurs even if
indoorcontroller board is replaced,
replace IR wireless remote controller
board.
9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA