Hitachi RAC-18WPE Service Manual page 48

Check the blinking frequency of the LD301.
Yes
The LD301 blinks 13 times.
EEPROM reading error
No
Yes
The LD301 blinks 9 times.
Communication error
No
No
The LD301 blinks once.
Reset stopped
Yes
Run the product either by remote control or the
indoor forcible cooling switch.
Compressor stoppage
LD301 blinking frequency each 0.25 second,
please check it carefully.
Yes
The LD301 blinks once.
Reset stopped
No
The LD301 blinks 9 times.
Yes
Communication error
No
* This page is for RAC-18/25/35WPE
Check the F cable connection (for half insertion, connection by
using a thin cable, erroneous connection between terminal boards
1 2 , and , and other abnormalities). 3
Normal
Blinks 3times
Check that the indoor timer lamp blinks.
Blinks 12 times
JW001 is open ?
or JW001 and JW002 is short ?
Normal
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.
Abnormality other
than compressor
stoppage
Identify the failure location.
Abnormality in equipment other
than the electrical parts
If the indoor unit is either of the following states,
it will blink once.
・ Ionmist in progress
・ 2 hours before the ON timer
Abnormal
JW001 is open or JW001 and JW002 is short
Electrical parts abnormality
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.
Other
48
Replace the outdoor electrical parts (in
the case of an abnormality in the
microcomputer or EEPROM).
Correct the F cable connection.
Check the indoor electrical parts.
(Check the temperature fuse in the
terminal board.)
Release back JW001 and JW002
Emplace the outdoor electrical parts
(in the case of an abnormality in the
communication circuit).
Replace the outdoor electrical parts (in
the case of an abnormality in the
communication circuit).
Correct the abnormal location.
Blinking once
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.