Hitachi RAC-25FXB, Service Manual, Page: 112 / 131

13ー25
The LD301 blinks 13 times.
EEPROM reading error
The LD301 blinks 9 times.
Communication error
Communication error
The LD301 blinks once.
Reset stopped
The LD301 blinks 9 times.
Check the blinking frequency of the LD301.
No
Compressor stoppage
No
Correct the F cable connection.
Abnormal
Normal
Normal
Blinks 3times
Blinks 12 times
Blinking once
Other
Yes
Electrical parts abnormality
Check the F cable connection (for half insertion, connection by using a thin cable, erroneous connection between terminal boards
Replace the outdoor electrical parts (in the case of an abnormality in the microcomputer or EEPROM).
Check that the indoor timer lamp blinks.
Check the indoor electrical parts. (Check the temperature fuse in the terminal board.)
Is the connector CN27
securely inserted?
(You may have forgotten to make the correction after a self-check.)
emplace the outdoor electrical parts (in the case of an abnormality in the communication circuit).
Abnormality other than compressor stoppage
Run the product either by remote control or the indoor forcible cooling switch.
Replace the outdoor electrical parts (in the case of an abnormality in the communication circuit).
Correct the abnormal location.
Abnormality in equipment other than the electrical parts
The LD301 blinks once.
Reset stopped
If the indoor unit is either of the following states, it will blink once. ·
Ionmist in progress
·
2 hours before the ON timer
Turn the power back on, run the product either by remote control or by using the forcible cooling switch, and check the blinking frequency of the LD301.
Replace the outdoor electrical parts (in the case of an abnormality in the reset circuit or microcomputer).
Conduct a check according to the description of the LED blinking 9 times given above.
Yes Yes
No No
Yes Yes
Insert the connector CN
and conduct
a double-check.
If the LD301 is on, It is performing cooling or heating. If the LD301 is on 2 second and off 0.3 second, the product is running with a heavy load. (This does not constitute a failure.) If the LD301 is bilnking each 0.25 second ,so please check the blinking number carefully of the lamp,and check it.
Identify the failure location.
CN27
disconnect
LD301 blinking frequency each 0.25 second,
please
check
it
carefully
.
1, 2 and 3, and other abnormalities).
27
* This page is only for
RAC-50FXB