Hitachi RAS-18SX8 Manuel De Maintenance page 237

Self-check
If you cannot divide the self-diagnosis lamp (blinking 2 times, 3 times, 4 times, 5 times) between the
electrical installation and compressor, conduct the following [self-check].
(The product will energize the intelligent power module on its own and check the inverter.)
・How to conduct self-check diagnosis
1. Shut down the power supply. (Wait at least 10 minutes until the DC voltage discharges.)
2. Pull out the CN30.
3. Turn the power back on and perform air purification on the indoor unit. (The LD302 blinks once.)
4. Press the [test switch] for at least 1 second.
・Energize the IPM and compressor motor in that order and check for short-circuits and openness.
5. Displaying the self-check diagnosis results
・When the self-check is over, the "LD303" will go on. The diagnosis findings are as shown in the
table below.
『Ｓ Ｅ Ｌ Ｆ −Ｃ Ｈ Ｅ Ｃ Ｋ』 Ｉ Ｓ Ｆ Ｉ Ｎ Ｉ Ｓ Ｈ Ｅ Ｄ
SELF-DIAGNOSIS LIGHTING MODE
L L
D D
3 3
0 0
1 2
RED RED
ONCE
2TIMES
7TIMES
10TIMES
13TIMES
※ Ｅ Ｘ ＡＭ Ｐ Ｌ Ｅ Ｏ Ｆ
BLINKING
(5 TIMES)
If the judgment indicates an abnormality, check the connection line. If nothing is loose or otherwise
defective, follow the correction procedure and replace the defective parts. If the electrical installation
proves to be trouble-free (blinking once), use it after securely inserting the CN30.
※If you forget to insert the CN30, the indoor timer lamp will blink 12 times and the product will not run.
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:LIGHTING
L
D
SELF-DIA-
3
CORRECTION CONTENTS
0
GNOSIS NAME
3
RED
NOT ELECTRIFICAL
EXCHANGE OF COMPRESSORS
DEFECTIVE
PEAK CURRENT CUT EXCHANGE OF ELECTRICAL
SIGNAL DETECTION CONTROLLING BOX.
・ Ｃ Ｈ Ｅ Ｃ Ｋ Ｔ Ｈ Ｅ Ｃ ＯＭ Ｐ Ｒ Ｅ Ｓ Ｓ Ｅ Ｒ
ABNORMAL COMP-
CONNECTOR
・ Ｅ Ｘ Ｃ Ｈ Ａ Ｎ Ｇ Ｅ Ｏ Ｆ Ｅ Ｌ Ｅ Ｃ Ｔ Ｒ Ｉ Ｃ Ａ Ｌ
RESSER CURRENT
CONTROLLING BOX.
ABNORMAL DC EXCHANGE OF ELECTRICAL
VOLTAGE CONTROLLING BOX.
EEPROM READING EXCHANGE OF ELECTRICAL
ERROR
CONTROLLING BOX.
・ ・ Ｌ Ｉ Ｇ Ｈ Ｔ Ｓ Ｆ Ｏ Ｒ ０ ． ２ ５
2SEC.
SEC. AT INTERVAL
OF 0.25 SEC.
DC VOLTAGE
MESUREMENT
POINT(+)
DC VOLTAGE
MESUREMENT
POINT(-)
IPM
OUTDOOR FAN
MOTOR CONNECTOR
manuals search engine
:OFF
:BLINKING
CONTROL P.W.B.
TEST SWITCH
CN30 FOR SELF-CHECK
– 270 –
LD301
LD302
LD303