Carrier 42cvur018-703 Service Manual page 65

(5) Troubleshooting for remote controller
<Primary check>
Check that A or B selected on the main unit is matched with A or B selected on the remote controller.
Is receiver
NO
on indoor unit
exposed to
direct sunlight?
YES
fluorescent light
Keep indoor unit
Avoid direct
sunlight. fluorescent light.
Is there any
NO
nearly?
YES
Does A/C operate
NO
by push RESET button
of indoor unit?
YES
Point remote to
digital camera can
see infrared at sending
LED on carmera monitor
when push [ ] button?
Replace main
P.C. Board
Reciver P.C. board
is defective.
away from Replace reciver
P.C. board.
Push the [ ] button.
Is transmission
mark indicated?
YES
Does indoor unit
operate when moving
NO
remote controller
near receiver or
indoor unit?
YES
Batteries are
exhausted.
NO
NO
YES
Replace
batteries.
– –
64
FILE NO. SVM-12052
The unit does not beep at all.
Operation lamp on indoor
unit is not indicated.
NO
Reset by push
RESET button
Push the
[ ] button.
NO
Is transmission
mark indicated?
YES
Does indoor unit
beep and operate?
YES
Remote controller
is defective.
Replace
Normal
remote controller.
operation