15
E
The louvre does not
swing
Amount of
GHKXPLGL¿FDWLRQLVORZ
Is the swing louvre OFF?
Normal
YES
NO
Does the swing louvre
change to Wide, Upward,
and Rear?
Check the insertion and
connector pins of the
power supply board CN708
connector and the stepping
motor connector
Firmly insert the
connectors or connector
pins in the trouble spots
Check the resistance values
between the stepping motor
connector pins
Normal
Terminals 1-2
Terminals 1-3
ȍWRȍ
Terminals 1-4
Terminals 1-5
Abnormal
Open or shorted between each
Replace the stepping
motor
Remove the dust or dirt
from the room temperature
and humidity sensor.
Firmly insert the
connectors or connector
pins in the trouble spots
Replace the operation
and display boards
Replace the power
supply board
,VWKHGHKXPLGL¿HULQVWDOOHG
in a low humidity, low
temperature environment?
Is there dust or dirt on the
room temperature and
humidity sensor?
Check the power supply
board CN706 connector
insertion and connector pins
Check the resistance values
of the room temperature and
humidity sensor
Connector pins (between 3 and 4)
1RUPDOWRNȍ
Abnormal: open or shorted
This is normal.
The amount of
GHKXPLGL¿FDWLRQPD\EHORZ
RUGHKXPLGL¿FDWLRQPD\QRW
be possible in a low humidity,
low temperature environment.
Explain the performance
curve on page 10.
Replace the room temperature
and humidity sensor
YES
YES
NG
NO
OK
NO
OK
OK
OK
NG
NG
OK
OK
OK
NG
NO
NO
OK
YES
YES
NG
NG
YES
Normal
OK
OK
OK
NO
<About operation sound>
When automatic operation is performed, operation may change from HIGH (65 Hz) to LOW (30 Hz)
depending on the room temperature and humidity. At that time, the operation sound may become loud as the
number of hertz (frequency) is gradually decreased but this is not abnormal. Please wait about 2 minutes.
<About replacing the power supply board>
Wait about 2 minutes after removing the plug from the outlet before replacing the board. (High voltage
warning)
