Hitachi RAD25QH4, Service Manual

Page: 261 / 293

１〜７ＴＩＭＥＳ LIT
SWITCHING FAILURE
SWITCHING FROM LOW FREQUENCY
SYNC START TO POSITION
DETECTION OPERATION FAILURE.
1
LEAK OF REFRIGERANT
2
COMPRESSOR
ACCELERATION DEFECTIVE
1
SYSTEM POWER MODULE
2
COMPRESSOR
3
P.W.B.s
4
INSERT FAILURE OF CN14A
DETAILS MAIN CHECK POINT
NORMAL OPERATION COMPRESSOR OPERATION NOT MALFUNCTION.
(1)
ROTATION SPEED
SET
VALUE
TIME
(3)
(2)
THE ROTATION SPEED IS AUTOMATICALLY
CONTROLLED TO PROTECT THE COMPRESSOR
IN THE OVERLOAD CONDITION.
THIS SHOWS AN
OVERLOAD,
NOT MALFUNCTION.
NORMAL STOP
2SEC.
(EEPROM READ ERROR ALSO 9 TIMES BLINKING)
ABNORMAL THERMISTOR
LD302A(ORANGE) BLINKING
OUTSIDE TEMPERATURE THERMISTOR
THERMISTOR FOR INDOOR UNIT 1 NARROW PIPE THERMISTOR FOR INDOOR UNIT 3 NARROW PIPE
THERMISTOR FOR INDOOR UNIT 1 WIDE PIPE THERMISTOR FOR INDOOR UNIT 3 WIDE PIPE
THERMISTOR FOR INDOOR UNIT 2 WIDE PIPE THERMISTOR FOR INDOOR UNIT 4 WIDE PIPE
THERMISTOR FOR INDOOR UNIT 4 NARROW PIPE THERMISTOR FOR INDOOR UNIT 2 NARROW PIPE
LD302B(ORANGE) BLINKING
RESET STOP
INDOOR THERMOSTAT OFF.
MAIN OPERATION OFF.
WHEN STOPPED WITH POWER RESET.
(NORMAL WHEN POWER
HAS BEEN TURNED ON.)
NOT MALFUNCTION.
NOT MALFUNCTION.
1TIME
2TIMES
PEAK CURRENT CUT OVERCURRENT IS DETECTED.
1 SYSTEM POWER MODULE
2
COMPRESSOR
3
P.W.B.s
3TIMES
ABNORMAL LOW SPEED
ROTATION
POSITION DETECTION SIGNAL
IS NOT INPUT DURING OPERATION.
1
SYSTEM POWER MODULE
2
COMPRESSOR
3
P.W.B.s
4
INSERT FAILURE OF CN14A,B
4TIMES
5TIMES
UNDER THE LOWER LIMIT OF
ROTATION SPEED WITH OVERLOAD
CONTROL CIRCUIT OPERATED.
OVERLOAD LOWER LIMIT
CUT
6TIMES
OH THERMISTOR TEMP.
RISE
1 LEAK OF REFRIGERANT
2
COMPRESSOR
OH THERMISTOR OPERATED.
2TIMES
9TIMES
COMMUNICATIONS ERROR 1
BETWEEN INDOOR UNIT
AND OUTDOOR UNIT
COMMUNICATION
ERROR OF INDOOR 1
COMPRESSOR SIDE A. EVEN WHEN THE
INDOOR UNIT IS
NOT CONNECTED,
IT BLINKS
SIMILARLY.
(NOT MALFUNCTION.)
COMMUNICATION
ERROR OF INDOOR 2
COMPRESSOR SIDE A.
COMPRESSOR SIDE A.
COMMUNICATION
ERROR OF
INDOOR 1 AND 2
COMMUNICATION
ERROR OF
INDOOR 3 AND 4
COMPRESSOR SIDE B.
COMMUNICATION
ERROR OF INDOOR 4
COMPRESSOR SIDE B.
COMMUNICATION
ERROR OF INDOOR 3
COMPRESSOR SIDE B.
1 INDOOR ELEC-AS
2
P.W.B.s
1
INDOOR ELEC-AS
2 P.W.B.s
3 SW-D-BOARD
4 P.W.B.s
P.W.B.s
(POWER CIRCUIT,
EEPROM,ETC.)
8TIMES
ABNORMAL POWER VOLTAGE
10TIMES
CONNECTION FAILURE
OF POWER CABLE
2
DIODE STUCK
3
REACTOR
4 POWER VOLTAGE
5
INSERT FAILURE OF CN14B
1
13TIMES
EEPROM READ ERROR
P.W.B.s
(POWER CIRCUIT,
EEPROM,ETC.)
14TIMES
ACTIVE CONVERTER
DEFECTIVE
SYSTEM POWER MODULE
2TIMES
SYSTEM POWER MODULE
ERROR
SYSTEM POWER MODULE
THERMISTOR ABNORMAL
3TIMES
NO ACCELERATION OVER THE LOWER
LIMIT OF THE ROTATION SPEED.
POWER VOLTAGE IS ABNORMALLY LOW.
MICROCOMPUTER CANNOT READ
THE DATA IN EEPROM.
3
0
4
A
L
3
0
3
A
L
3
0
2
A
L
3
0
1
A
L
D
D D D
3
0
4
B
L
3
0
3
B
L
3
0
2
B
L
3
0
1
B
L
D
D D D
R
E
D
R
E
D
O
R
A
N
G
E G
R
E
E
N
2TIMES
3TIMES
4TIMES
5TIMES
6TIMES
7TIMES
BLINKING
TIMES
SELF-DIAGNOSIS LIGHTING MODE :OFF :LIT :BLINKING
CONNECTION FAILURE OF F CABLE
ELECTRICAL ASSEMBLY INDOOR UNIT
1
2
CORRESPONDENCE TABLE FOR ABNORMAL THERMISTOR
THERMISTOR IS OPEN OR SHORTED.
※ＲＥＦＥＲ ＴＯ ＴＨＥ ＦＯＬＬＯＷＩ
ＮＧ
"CORRESPONDENCE TABLE FOR ABNORMAL THERMISTOR"
COMMUNICATIONS BETWEEN MICROCOMPUTERS OF
COMPRESSOR SIDE A & COMPRESSOR SIDE B
ARE INTERRUPTED.
OVERVOLTAGE IS DETECTED BY
SYSTEM POWER MODULE.
OVERVOLTAGE IS DETECTED BY
SYSTEM POWER MODULE.
1TIME
1TIME COMPRESSOR SIDE A.OH THERMISTOR
COMPRESSOR SIDE A.DEFROST THERMISTOR COMPRESSOR SIDE B.OH THERMISTOR
COMPRESSOR SIDE B.DEFROST THERMISTOR
（ ・ ・ ・Ｌ ＩＧＨＴＳ ＦＯＲ ０． ２５ ＳＥＣ ＡＴ Ｉ ＮＴＥＲＶＡＬ ＯＦ ０． ２５ ＳＥＣ． ） ※ＥＸＡＭＰＬＥ ＯＦ ＢＬ Ｉ ＮＫ Ｉ ＮＧ
(5
TIMES)
SELF-DIA-GNOSIS NAME
OVERLOAD (1)
OVERLOAD (2)
OVERLOAD (3)
COMMUNICATIONS ERROR 2
BETWEEN INDOOR UNIT
AND OUTDOOR UNIT
COMMUNICATIONS ERROR 3
BETWEEN INDOOR UNIT
AND OUTDOOR UNIT
COMMUNICATIONS ERROR
BETWEEN OUTDOOR UNIT
SERVICE OPERATION
DANGER (COURANT CONTINU DE 360V) DANGER(DC360V)
C4D4
INDOOR 4
MISS-CONNECT BECOMES THE CAUSE OF FAILURE AND NOT OPERATE.
N L C3D3
INDOOR 3
C1D1
INDOOR 1
C2D2
INDOOR 2
COMPRESSOR
SIDE A. COMPRESSOR
SIDE B.
L
D
3
0
4
A L
D
3
0
3
A L
D
3
0
2
A L
D
3
0
1
A L
D
3
0
4
B L
D
3
0
3
B L
D
3
0
2
B L
D
3
0
1
B
R
E
D
B
R
O
W
N
Y
E
L
L
O
W
B
L
U
E
B
R
O
W
N
R
E
D
B
L
U
E
Y
E
L
L
O
W
SPIRAL STRIPS
3 ROOMS MULTI MODEL HAVE
ONLY THE TERMINAL BOARD
FOR INDOOR 3.(C3D3)
SERVICE SWITCH
MAKE SURE THAT THE EXCLUSIVE
BREAKER IS TURNED OFF BEFORE
CABLE CONNECTION AND REMOVAL.
(BE CAREFUL OF AN ELECTRIC SHOCK
AT THE TIME OF OPERATION.)
3
THERMISTOR CIRCUIT
1
THERMISTOR
2
CONNECTION
OF THERMISTOR DEFECTIVE
2 FAN MOTOR
3
FAN MOTOR CIRCUIT
1
OUTDOOR UNIT IS EXPOSED
TO DIRECT SUNLIGHT OR
ITS AIRFLOW BLOCKED.
●
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