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– 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
RED
RED
RED
PEAK
CURRENT
CUT
SIGNAL
DETECTION
EXCHANGE
OF
COMPRESSORS
2TIMES
7TIMES
10TIMES
13TIMES
SELF-DIAGNOSIS
LIGHTING
MODE
:LIGHTING
:BLINKING
『SELF−CHECK』
I
S F
I
N
I
SHED
SELF-DIA-
GNOSIS
NAME
CORRECTION CONTENTS
ABNORMAL
DC
VOLTAGE
EEPROM
READING
ERROR
EXCHANGE
OF
ELECTRICAL
CONTROLLING
BOX.
EXCHANGE
OF
ELECTRICAL
CONTROLLING
BOX.
EXCHANGE
OF
ELECTRICAL
CONTROLLING
BOX.
NOT
ELECTRIFICAL
DEFECTIVE
ABNORMAL
COMP-
RESSER
CURRENT
・CHECK
THE
COMPRESSER
CONNECTOR
・EXCHANGE OF ELECTR
I
CAL
CONTROLLING
BOX.
2SEC.
・
・L
IGHTS FOR 0.
25
SEC.
AT
INTERVAL
OF 0.25
SEC.
※EXAMPLE OF
BLINKING
(5
TIMES)
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.
CN30
FOR
SELF-CHECK
LD301
LD302
LD303
CONTROL
P.W.B.
TEST
SWITCH
OUTDOOR
FAN
MOTOR
CONNECTOR
IPM
DC
VOLTAGE
MESUREMENT
POINT(+)
DC
VOLTAGE
MESUREMENT
POINT(-)