Hitachi RAS-50WX8 Service Manual page 131

LIGHTING MODE OF THE SELF-DIAGNOSIS LAMP
MODEL RAC-50WX8, RAC-D18EX3
CUT THE POWER
SOURCE AND WAIT
MORE THAN 10
MINUTES BEFORE
SERVICE WORK.
CONFIRM THE DC
VOLTAGE AT THE
MEASURING POINT
SHOWN IN FIGURE
MUST BE LESS
THAN 10V.
DO NOT TOUCH THE
SCREWS AT SYSTEM
POWER MODULE DUE
TO HIGH VOLTAGE.
DO NOT TOUCH THE
OTHER COMPONENTS
WHEN OPERATING THE
SERVICE SWITCH.
ATTENDRE DIX MINUTES
APRÈS AVOIR ÉTEINT
L'INTERRUPTEUR DE
COURANT QUAND
L'OPÉRATION
D'ENTRETIEN EST
TERMINEÉ.
CONTRÔLER QUE LE
VOLTAGE EST DE
MOINS DE 10V. C.C.
AU POINT DE MESURE.
NE PAS TOUCHER LA
VIS DU MODULE DE
PUISSANCE DU SYSTÈME
À CAUSE DE SON
VOLTAGE ÉLEVÉ.
NE TOUCHER AUCUNE
PARTIE SUR LE
BOÎTIER CONTENANT
L'INTERRUPTEUR DE
BRANCHEMENT.
SERVICE
OPERATION
PROCEDURE OF REFRIGERANT PUMP
DOWN OR INDEPENDENT OPERATION
OF OUTDOOR UNIT.
1. CUT OFF THE POWER SOURCE ONCE
THEN ON AGAIN.
2. WAIT 1 MINUTE AL LEAST.
3. PRESS THE SERVICE SWITCH
( WHICH IS ON THE PWB ) MORE
THAN 1 SECOND.
SERVICE OPERATION WILL BE STARTED.
TO STOP THIS OPERATION , PRESS
THE SERVICE SWITCH AGAIN ( MORE
THAN 1 SECOND ) .
TO RESUME TO NORMAL OPERATION ,
CUT THE POWER SOUCE ONCE THEN
ON AGAIN.
IN ORDER TO PROTECT THE DAMAGE
OF COMPRESSOR , DO NOT OPERATE
MORE THAN 5 MINUTES WITH SERVICE
VALVE CLOSE.
DANGER SELF-DIAGNOSIS LIGHTING MODE
L
( DC400V )
D
3
0
1
RED RED
1TIME
DANGER
2TIMES
( )
C.C. DE 400V
3TIMES
4TIMES
5TIMES
6TIMES
7TIMES
8TIMES
9TIMES
10TIMES
12TIMES
13TIMES
14TIMES
※EXAMPLE OF
BLINKING (5 TIMES)
POINT DE MESURE
MEASURING POSITION OF DC VOLTAGE ( ＋ )
SCREW ( DANGER OF ELECTRIC SHOCK )
L
SELF-DI A -
D
3
GNOSI S NAME DETAILS MAI N CHECK POI N T
0
2
[ 1 ] DURING OPERATION
NORMAL
COMPRESSOR
OPERATION
OPERATION
SET
(2)
OVERLOAD (1)
VALUE
(1)
(3)
OVERLOAD
TIME
(2)
THE ROTATION SPEED IS
AUTOMATICALLY CONT-
OVERLOAD
ROLLED TO PROTECT THE
(3) COMPRESSOR IN THE
OVERLOAD CONDITION.
[ 2 ] DURING STOP LD303 (RED) GOES OFF.
NORMAL
STOPPED BY THERMOSTAT
OR CONTROLLER.
STOP
MICROPROCESSOR WAS
RESET
REBOOTED. (IT IS NORMAL
WHEN POWER SW HAS BEEN
STOP
TURNED ON)
COMPRESSOR PEAK
PEAK CURRENT
CURRENT WAS BEYOND
CUT
MAXIMUM LIMIT.
ABNORMAL
LOST THE COMPRESSOR
LOW SPEED
ROTOR POSITION.
ROTATION
SWITCHING FROM LOW
SWITCHING
FREQUENCY SYNC START
TO POSITION DETECTION
FAILURE
OPERATION FAILURE.
OVERLOAD PROTECTION
OVERLOAD
FUNCTION IS REQUESTING
LOWER LIMIT CUT
LOWER SPEED THAN MINIMUM
SPEED OF COMPRESSOR.
COMPRESSOR OVERHEAT
OH THERMISTOR
WAS DETECTED BY
TEMP.RISE
OH THERMISTOR.
ABNORMAL THERMISTOR
THERMISTOR
VALUE (OPEN OR SHORT)
ABNORMAL
WAS DETECTED.
COMPRESSOR WAS NOT
ACCELERATION
ACCELERATED MORE THAN
FAILURE
MINIMUM SPEED.
COMMUNICATIONS BETWEEN
COMMUNICA-
INDOOR UNIT AND OUTDOOR
TIONS ERROR
UNIT ARE INTERRUPTED
ABNORMAL
ABNORMAL POWER SOURCE
WAS DETECTED
POWER
SOURCE
OUTDOOR FAN RPM IS
FAN LOCK
NOT ROTATE AS INTENDED
ERROR
RPM
EEPROM
MICROCOMPUTER CANNOT
READ THE DATA IN EEPROM.
READ ERROR
OVERVOLTAGE WAS
ACTIVE CONVERTER
DETECTED BY
DEFECTIVE
SYSTEM POWER MODULE
2sec.
MEASURING POSITION OF DC VOLTAGE ( − )
SYSTEM POWER MODULE
HIC
CN14
CN8 CN7
CN15
WHT
CN5 CN10 CN9
SERVICE SWITCH
– 172 –
:LIGHT :BLINK :OFF
LD303 (RED) LIGHTS.
NOT MALFUNCTION
THIS SHOWS AN
OVERLOAD PROTECTION
STATUS.
NOT MALFUNCTION.
NOT MALFUNCTION.
P.W.B.
①SYSTEM POWER MODULE
②COMPRESSOR ③P.W.B.
①SYSTEM POWER MODULE
②COMPRESSOR ③P.W.B.
①SYSTEM POWER MODULE
②COMPRESSOR ③P.W.B.
①OUTDOOR UNIT IS EXPOSED TO DIRECT
SUNLIGHT OR ITS AIRFLOW BLOCKED.
②FAN MOTOR ③FAN MOTOR CIRCUIT
④THE VOLTAGE IS EXTREMELY LOW.
①LEAK OF REFRIGERANT ②COMPRESSOR
③OH THERMISTOR CIRCUIT
④FAN MOTOR ④FAN MOTOR CIRCUIT
①THERMISTOR ②CONNECTION
OF THERMISTOR DEFECTIVE
③THERMISTOR CIRCUIT
①LEAK OF REFRIGERANT
②COMPRESSOR
①CABLE IS WRONG CONNECTED
②CABLE IS OPEN ③INTERFACE
CIRCUIT OF BETWEEN INDOOR
UNIT AND OUTDOOR UNIT
①ABNORMAL POWER SOURCE
②CABLE IS WRONG CONNECTED
③SYSTEM POWER MODULE
④P.W.B.
①FAN MOTOR
②FAN MOTOR CIRCUIT
P.W.B.
SYSTEM POWER MODULE
‥LIGHTS FOR 0.25
SEC AT INTERVAL
OF 0.25 SEC.
P.W.B.
N
YEL
BLU
GRN2
RED
BRN
CN2
RED GRN1 BLK
WHT
LD301
LD302
LD303