Hitachi RAC-25WPA RAC25WPA ユーザーズマニュアル
製品コード
RAC25WPA
14-17
14.4.5 CHECKING THE REMOTE CONTROLLER
No
Is battery polarity correct?
Install the battery in the correct polarity
Is battery check sign flashing ?
Replace the battery
Turn on an AM radio, bring the
remote control switch within
15cm of the radio, and press
the ON/OFF button.
remote control switch within
15cm of the radio, and press
the ON/OFF button.
Does the radio buzz noisily?
Check the LED (D1) with a
multimeter
multimeter
Check the indoor unit signal
receiving P.W.B. If it is good,
check the main P.W.B.
receiving P.W.B. If it is good,
check the main P.W.B.
Check functions again. If it
does not work, replace the
remote controller.
does not work, replace the
remote controller.
Yes
Yes
No
No
Yes
14.4.6 OUTDOOR UNIT DOES NOT OPERATE (BUT RECEIVES REMOTE INFRARED SIGNAL)
Set to room temperature 16ºC in the
cooling mode or 32ºC in the heating
mode, and press the Start/Stop
button
cooling mode or 32ºC in the heating
mode, and press the Start/Stop
button
Please remove the outdoor unit
cover and electrical parts cover, and
check self-diagnosis lamp LD301
cover and electrical parts cover, and
check self-diagnosis lamp LD301
Check the room temperature and the heat
exchanger thermistor if they are defective.
exchanger thermistor if they are defective.
[Normal values]
10C : about 20k
25C : about 10k
30C: about 8k
10C : about 20k
25C : about 10k
30C: about 8k
Yes
Does outdoor
electrical part LD301
blink nine times?
electrical part LD301
blink nine times?
Check outdoor electrical
parts and repair any
defective parts (around
the outdoor interface
transmitting circuit)
parts and repair any
defective parts (around
the outdoor interface
transmitting circuit)
No
Yes
No
Is the indoor/outdoor unit
communication signal
superimposed on 35VDC of
connection C-D?
communication signal
superimposed on 35VDC of
connection C-D?
38kHz about 2Vp-p
About
35V
0V
Is the indoor transmitting
signal being generated at
Q801’s collector
signal being generated at
Q801’s collector
38kHz about 2Vp-p
About
35V
0V
Transmission wave
Yes
Check outdoor electrical
parts and repair any
defective parts (around
the outdoor interface
transmitting circuit)
parts and repair any
defective parts (around
the outdoor interface
transmitting circuit)
Check the indoor
interface transmitting
circuit. Replace IC801
interface transmitting
circuit. Replace IC801
No
Yes
Does LD303 switch
OFF several seconds
after it lighs?
OFF several seconds
after it lighs?
Check outdoor electrical
parts and repair any
defective parts
parts and repair any
defective parts
Yes
Perform final operation check