Hitachi RAC-25WPA RAC25WPA ユーザーズマニュアル
製品コード
RAC25WPA
14-12
14.3 PRELIMINARY CHECK ON INDOOR/OUTDOOR UNIT ELECTRICAL PARTS AND
REFRIGERATING
Yes
No
No
Is the indoor unit “timer lamp” blinking?
Run the unit using the following remote
controller settings:
controller settings:
In the cooling season, set the
temperature to 16ºC in the coolng
mode.
temperature to 16ºC in the coolng
mode.
In the heating season, set the
temperature to 32ºC in the heating
mode.
temperature to 32ºC in the heating
mode.
Does the operation lamp light or blink?
Is the compressor running?
Open the outdoor unit and
observe the self-diagnosis lamp
(LD301). Count how many times
the lamp blinks
observe the self-diagnosis lamp
(LD301). Count how many times
the lamp blinks
Not running
Running
Blinks
other than
1 time
other than
1 time
Troubleshoot according to the
self-diagnosis lighting mode
self-diagnosis lighting mode
Open the indoor unit and check the
voltage between
Ⓒ
and
Ⓓ
on the
indoor unit control P.W.B.
Normal: DC35V (32~38V)
Is the voltage correct
Check if the connecting cable
connected incorrectly?
inserted incompletely or
disconnected?
connected incorrectly?
inserted incompletely or
disconnected?
Can the unit operate using the
outdoor unit service switch?
(See the nameplate on the
outdoor unit ofr operating
instructions.
outdoor unit service switch?
(See the nameplate on the
outdoor unit ofr operating
instructions.
Check the refrigerating cycle
In the event of overload limit cut
or OH thermistor temperature
resie, use the self-diagnosis
memory function because such
failure may evade detection due
to ambient temperature
variations or other factors
or OH thermistor temperature
resie, use the self-diagnosis
memory function because such
failure may evade detection due
to ambient temperature
variations or other factors
Check the outdoor
electrical parts
electrical parts
Check the indoor
electrical parts
electrical parts
No
Yes
Yes
Blinks 1 time
No
Yes