– 270 –
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.
ONCE
:OFF
REDRED RED
PEAKCURRENTCUT
SIGNALDETECTION
EXCHANGEOFCOMPRESSORS
2TIMES
7TIMES
10TIMES
13TIMES
SELF-DIAGNOSISLIGHTINGMODE
:LIGHTING
:BLINKING
『ＳＥＬＦ−ＣＨＥＣＫ』ＩＳＦＩＮＩＳＨＥＤ
SELF-DIA-
GNOSISNAME
CORRECTION CONTENTS
ABNORMALDC
VOLTAGE
EEPROMREADING
ERROR
EXCHANGEOFELECTRICAL
CONTROLLINGBOX.
EXCHANGEOFELECTRICAL
CONTROLLINGBOX.
EXCHANGEOFELECTRICAL
CONTROLLINGBOX.
NOTELECTRIFICAL
DEFECTIVE
ABNORMALCOMP-
RESSERCURRENT
・ＣＨＥＣＫ ＴＨＥ ＣＯＭＰＲＥＳＳＥＲ
CONNECTOR
・ＥＸＣＨＡＮＧＥＯＦＥＬＥＣＴＲＩＣＡＬ
CONTROLLINGBOX.
2SEC.
・・ＬＩＧＨＴＳＦＯＲ０．２５
SEC.ATINTERVAL
OF 0.25SEC.
※ＥＸＡＭＰＬＥＯＦ
BLINKING
(5TIMES)
L
D
3
0
1
L
D
3
0
2
L
D
3
0
3
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.
CN30FORSELF-CHECK
LD301
LD302
LD303
CONTROLP. W . B .
TESTSWITCH
OUTDOORFAN
MOTORCONNECTOR
IPM
DCVOLTAGE
MESUREMENT
POINT(+)
DCVOLTAGE
MESUREMENT
POINT(-)
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