Hitachi RAS-25CNH1 Service Manual page 88

[ MODEL RAC-25CNH11 ]
SELF—DIAGNOSIS LIGHTING MODE : LIT : BLINKING : OFF
L L
SELF—DIA—
D D
DETAILS
3 3
0 0
GNOSIS NAME
1 2
RED RED
[ 1 ] DURING OPERATION
NORMAL COMPRESSOR
OPERATION OPERATION
(1)
OVERLOAD
ROTA-
TION
(1)
SPEED
OVERLOAD
(2)
THE ROTATION SPEED IS
AUTOMATICALLY CONT-
OVERLOAD ROLLED TO PROTECT THE
COMPRESSOR IN THE
(3)
OVERLOAD CONDITION.
ONLY BLINKS WHEN LOW
SERVICE
FREQUENCY SYNC STARTS IN
THE FORCED COOLING
OPERATION
BLINKING
OPERATION.
TURNING ON AND OFF ARE REPEATED AT BLINKING
INTERVAL OF 0.25 SEC. IN BLINKING.
[ 2 ] DURING STOP
NORMAL
INDOOR THERMOSTAT OFF.
MAIN OPERATION OFF.
STOP
WHEN STOPPED WITH
RESET
POWER RESET.
(NORMAL WHEN POWER
STOP
1 TIME
HAS BEEN TURNED ON.)
PEAK CURRENT
OVERCURRENT
CUT
IS DETECTED.
2 TIMES
ABNORMAL POSITION DETECTION
LOW SPEED
SIGNAL IS NOT INPUT
ROTATION
3 TIMES DURING OPERATION.
SWITCHING FROM LOW
SWITCHING
FREQUENCY SYNC START
TO POSITION DETECTION
FAILURE
4 TIMES
OPERATION FAILURE.
UNDER THE LOWER LIMIT
OVERLOAD
OF ROTATION SPEED
LOWER LIMIT
WITH OVERLOAD CONTROL
CUT
5 TIMES
CIRCUIT OPERATED.
OH, FIN
OH THERMISTOR OR
THERMISTOR
FIN THERMISTOR IS
TEMP. RISE
6 TIMES OPERATED.
THERMISTOR IS OPEN OR
THERMISTOR
SHORTED.
(OH. OUTER TEMPERATURE.
ABNORMAL
7 TIMES
DEF. THERMISTOR)
NO ACCBLERATION OVER
ACCELERATION
THE LOWER LIMIT OF
DEFECTIVE
8 TIMES THE ROTATION SPEED.
COMMUNICA—
COMMUNICATIONS
TIONS ERROR
STOPPED.
9 TIMES
ABNORMAL
POWER VOLTAGE IS
POWER
ABNORMALLY LOW.
VOLTAGE
10 TIMES
EXAMPLE OF 2
BLINKING
(5 TIMES)
MAIN CHECK POINT
LD303 (RED) LIGHTS.
NOT MALFUNCTION
(2) SET
VALUE
(3) THIS SHOWS AN
TIME
OVERLOAD.
NOT MALFUNCTION.
1 INTERFACE CIRCUIT
2 OUTDOOR P. W. B.
3 SERVICE SWITCH
LD303 (RED) GOES OFF.
NOT MALFUNCTION.
CONTROL P. W .B.
(POWER CIRCUIT,
MICROCOMPUTER, ETC.)
1 POWER MODULE
2 COMPRESSOR
3 CONTROL P. W. B.
1POWER MODULE 2COMP-
RESSOR 3CONTROL P.W.B.
(DRIVE CIRCUIT. POSITION
DETECTION CIRCUIT. ETC.)
1POWER MODULE 2COMP-
RESSOR 3CONTROL P.W.B.
(DRIVE CIRCUIT. POSITION
DETECTION CIRCUIT. ETC.)
1OUTDOOR UNIT IS EXPOSED TO DIRECT
SUNLIGHT OR ITS AIRFLOW BLOCKED.
2FAN MOTOR
3FAN MOTOR CIRCUIT
1 LEAK OF REFRIGERANT
2 COMPRESSOR
3 THERMISTOR CIRCUIT (OH)
1 THERMISTOR 2CONNECTION
OF THERMISTOR DEFECTIVE
3 THERMISTOR CIRCUIT
1 LEAK OF REFRIGE-
RANT
2 COMPRESSOR
1 INCORRECT CONNECTION OF CABLES
2 DISCONNECTION OF CABLE
3 INDOOR/OUTDOOR INTERFACE
CIRCUIT
1 POWER VOLTAGE
2 CONNECTION OF
REACTOR
. . .
S E C .
LIGHTS FOR 0.25 SEC
AT INTERVAL
OF 0.25 SEC.
( 3 ) L I G H T I N G M O D E I N T H E O P E R AT I O N W I T H C O M P R E S S O R L E A D
D I S C O N N E C T E D
( 1 ) D I S C O N N E C T T H E C O N N E C TO R S O F T H E L E A D C O N N E C T E D TO
T H E C O M P R E S S O R .
( 2 ) S E T TO T H E O P E R AT I O N M O D E A N D P R E S S T H E S TA RT / S TO P
S W I T C H .
( 3 ) W H E N T H E O P E R AT I O N A B O U T 1 m i n . N O R M A L LY ( L D 3 0 3 L I G H T S ) .
T H E E L E C T R I C A L PA RT S I N T H E O U T D O O R U N I T ( E S P E C I A L LY
P OW E R M O D U L E ) C A N B E T H O U G H T TO B E N O R M A L .
TO C O L L E C T R E F R I G E R A N T O R TO O P E R AT E O U T D O O R
SERVICE
U N I T I N D E P E N D E N T LY, T U R N O F F P OW E R S W I T C H O F
OPERATION
T H E I N D O O R U N I T O N C E , T H E N T U R N O F F AG A I N A N D
S E T T H E S E RV I C E S W I T C H TO C O O L S I D E . ( C O O L I N G
C Y C L E I S S E T. )
TO O P E R AT E U N I T AG A I N , B E S U R E TO R E T U R N
S E RV I C E S W I T C H TO N O R M A L , A N D T U R N O F F P OW E R
S W I T C H , T H E N T U R N I T O N AG A I N .
B E S U R E TO C H E C K T H AT P OW E R S W I T C H I S T U R N E D
CAUTION
O F F B E F O R E S E RV I C I N G .
( N OT E 1 )
L D 3 0 1 B L I N K I N G 9 T I M E S M O D E O C C U R S N OT O N LY B E C AU S E
O F C O M M U N I C AT I O N S E R RO R , BU T A L S O W H E N FA L L S I G NA L
I S S E N T TO I N D O O R U N I T 8 T I M E S W I T H I N 3 0 M I N U T E S . C H E C K
W H E T H E R O R N OT D E H U M I D I F Y I N G L A M P O N I N D O O R U N I T I S
B L I N K I N G .
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