Hitachi RAC-18WPC, Service Manual, Page: 34 / 43

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. ǂ
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
No
Yes
Electrical parts abnormality
Check the F cable connection (for half insertion, connection by
using a thin cable, erroneous connection between terminal boards
, and , and other abnormalities).
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.)
(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
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.
LD301 blinking frequency each 0.25 second,
please check it carefully.
JW001 is open ?
or JW001 and JW002 is short ?
JW001 is open or JW001 and JW002 is short
Release back JW001 and JW002
1 2 3
Emplace the outdoor electrical parts
34