Troubleshooting For Remote Control (Including The Indoor P.c. Board) - Carrier 42NQ012N Service Manual

9-6. Troubleshooting for Remote Control (Including the Indoor P.C. Board)

<Primary check>
Check that A or B selected on the main unit is matched with A or B selected on the remote controller.
Is there direct
NO
sunlight on the
receptor of the air
conditioner?
YES
Is there any
thyristor
fluorescent light
nearly?
Keep the air
conditioner away
from thyristor
Avoid direct
fluorescent light.
sunlight.
YES
NO NO
YES
Is operation possible
when setting the
NO
temporary switch of the
air conditioner main unit
to "TEST RUN" or
"TEMPORARY AUTO"?
YES
Can any signal tone
be heard in a transistor
radio when transmitting
within 5 cm distance
from the radio?
YES
P.C. board is failure.
Replace
P.C. board
Push the [ ] button.
NO
Does the transmission
indicator blink?
Is operation
possible when the
transmitter is moved
nearer to the infrared
signal receiver of the
air conditioner?
YES
Battery life
NO
NO
Replace the
batteries
Note : Atter batteries replacement, short circuit the metal terminal
at the side of the battery compartment.
− 52 −
FILE NO. SVM-10031
There is no beep from the indoor unit
The OPERATION lamp of the
air conditioner main unit does not light
Reset the remote control
by take off batteries
Push the [ ]
button
Dose the
NO
transmission
indicator light?
YES
Is there any
beep and
operation?
YES
Remote control
is failure.
Replace remote
Normal
control.