49
●
Re-install the unit
away from the lights.
●
Attach a filter to light-
intercepting part.
Check of remote controller and indoor electronic control P.C. board.
G
Check of indoor fan motor.
F
Turn off power
supply and check
connector CN
211 visually.
Are lead wires
dis connected?
No
No
Yes
Yes
No
No
Yes
Yes
Normal
Disconnect lead wires from
CN 211 on indoor electronic
control P.C. board.
Measure resistance
between lead wire
1
and
3
and then
2
and
3
.
Yes
Yes
No
No
(not clear)
No
Yes
(How to check main parts)
Indoor fan does not operate.
Indoor unit operates by pressing the Emergency operation switch, but does not operate with the remote controller.
Is soldered
point
abnormal?
Lead wires are
not properly
connectes
Is LCD display on
remote controller
visible?
Does the unit
operate with
remote
controller?
Is noise
heard from
the radio?
Is voltage
approx.
+4V DC?
Are there any
fluorescent lights
of inverter or
radio start type
within 1 meter?
Is resistance
0
"
(short) or
"
(open) ?
Connector is
not properly
soldered.
Replace batteries and
then press RESET
button.
See page 32.
Receiver
defect
Indoor
electronic
control P.C.
board defect.
Indoor fan motor
defect
Indoor
electronic
control P.C.
board defect.
CN211
3
2
1
fan
motor
indoor electronic
control P.C. board
Check the model
name of remote
controller.
Remove batteries and set them back.
Check again if indoor unit operates
with remote controller.
Tune a radio in
to AM and press
OPERATE/STOP
button on remote
controller.
Remote
controller defect
Turn on power to indoor unit,
and measure voltage
between connector LD 101
2
(+) and JPG(-1) on indoor
control P.C. board when
OPERATE/STOP button on
remote controller is pressed.
Yes
No (+5V DC)
Model name and
part No.
are witten here
back side of
remote controller
(
)
LD101
1
2
3
4
5
1
2
3
4
5
remote
controller
Indoor electronic
control P.C. board
light-interception
ihdication board