– 172 –
LD303
LD302
LD301
SYSTEM
POWER
MODULE
MEASURING
POSITION
OF
DC
VOLTAGE(
−
)
MEASURING
POSITION
OF
DC
VOLTAGE(
＋
)
HIC
P.W.B.
SERVICE
SWITCH
SCREW(DANGER
OF
ELECTRIC
SHOCK)
SERVICE
OPERATION
SELF-DIAGNOSIS
LIGHTING
MODE
:OFF
L
D
3
0
2
L
D
3
0
1
RED RED
SELF-DIA-
GNOSIS
NAME DETAILS MAIN
CHECK
POINT
[ 1 ] DURING
OPERATION
LD303 (RED) LIGHTS.
NORMAL
OPERATION
COMPRESSOR
OPERATION
NOT
MALFUNCTION
OVERLOAD
(1)
OVERLOAD
(2)
OVERLOAD
(3)
RO
TAT
IO
N
SPEED
SET
VALUE
TIME
THE
ROTATION
SPEED
IS
AUTOMATICALLY
CONT-
ROLLED
TO
PROTECT
THE
COMPRESSOR
IN
THE
OVERLOAD
CONDITION.
[ 2 ] DURING
STOP
LD303 (RED) GOES
OFF.
NORMAL
STOP
NOT
MALFUNCTION.
1TIME
RESET
STOP
2TIMES
PEAK
CURRENT
CUT
3TIMES
ABNORMAL
LOW
SPEED
ROTATION
4TIMES
SWITCHING
FAILURE
SWITCHING
FROM
LOW
FREQUENCY
SYNC
START
TO
POSITION
DETECTION
OPERATION
FAILURE.
5TIMES
OVERLOAD
LOWER
LIMIT
CUT
①
OUTDOOR
UNIT
IS
EXPOSED
TO
DIRECT
SUNLIGHT
OR
ITS
AIRFLOW
BLOCKED.
②
FAN
MOTOR
③
FAN
MOTOR
CIRCUIT
④
THE
VOLTAGE
IS
EXTREMELY
LOW.
6TIMES
OH
THERMISTOR
TEMP.RISE
7TIMES
THERMISTOR
ABNORMAL
①
THERMISTOR
②
CONNECTION
OF
THERMISTOR
DEFECTIVE
③
THERMISTOR
CIRCUIT
8TIMES
①
LEAK
OF
REFRIGERANT
②
COMPRESSOR
12TIMES
EEPROM
READ
ERROR
MICROCOMPUTER
CANNOT
READ
THE
DATA
IN
EEPROM.
13TIMES
ACTIVE
CONVERTER
DEFECTIVE
SYSTEM
POWER
MODULE
10TIMES
※
EXAMPLE OF
BLINKING
(5
TIMES)
2sec.
‥
LIGHTS FOR 0.25
SEC
AT
INTERVAL
OF
0.25
SEC.
9TIMES
14TIMES
COMMUNICA-
TIONS
ERROR
COMMUNICATIONS
BETWEEN
INDOOR
UNIT
AND
OUTDOOR
UNIT
ARE
INTERRUPTED
①
CABLE
IS
WRONG
CONNECTED
②
CABLE
IS
OPEN
③
INTERFACE
CIRCUIT
OF
BETWEEN
INDOOR
UNIT
AND
OUTDOOR
UNIT
FAN
LOCK
ERROR
OUTDOOR
FAN
RPM
IS
NOT
ROTATE
AS
INTENDED
RPM
①
FAN
MOTOR
②
FAN
MOTOR
CIRCUIT
OVERLOAD
PROTECTION
FUNCTION
IS
REQUESTING
LOWER
SPEED
THAN
MINIMUM
SPEED
OF
COMPRESSOR.
OVERVOLTAGE
WAS
DETECTED
BY
SYSTEM
POWER
MODULE
COMPRESSOR
PEAK
CURRENT
WAS
BEYOND
MAXIMUM
LIMIT.
LOST
THE
COMPRESSOR
ROTOR
POSITION.
ABNORMAL
THERMISTOR
VALUE
(OPEN
OR
SHORT)
WAS
DETECTED.
MICROPROCESSOR
WAS
REBOOTED.
(IT
IS
NORMAL
WHEN
POWER
SW
HAS
BEEN
TURNED
ON)
STOPPED
BY
THERMOSTAT
OR
CONTROLLER.
ACCELERATION
FAILURE
COMPRESSOR
WAS
NOT
ACCELERATED
MORE
THAN
MINIMUM
SPEED.
COMPRESSOR
OVERHEAT
WAS
DETECTED
BY
OH
THERMISTOR.
①
LEAK
OF
REFRIGERANT
②
COMPRESSOR
③
OH
THERMISTOR
CIRCUIT
④
FAN
MOTOR
④
FAN
MOTOR
CIRCUIT
:LIGHT :BLINK
THIS
SHOWS
AN
OVERLOAD
PROTECTION
STATUS.
NOT
MALFUNCTION.
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
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.
ATTENDRE
DIX
MINUTES
APRÈS
AVOIR
ÉTEINT
L'INTERRUPTEUR
DE
COURANT
QUAND
L'OPÉRATION
D'ENTRETIEN
EST
TERMINEÉ.
(
C.C.
DE
400V
)
ABNORMAL
POWER
SOURCE
ABNORMAL
POWER
SOURCE
WAS
DETECTED
P.W.B.
①
SYSTEM
POWER
MODULE
②
COMPRESSOR
③
P.W.B.
①
SYSTEM
POWER
MODULE
②
COMPRESSOR
③
P.W.B.
①
SYSTEM
POWER
MODULE
②
COMPRESSOR
③
P.W.B.
P.W.B.
①
ABNORMAL
POWER
SOURCE
②
CABLE
IS
WRONG
CONNECTED
③
SYSTEM
POWER
MODULE
④
P.W.B.
(3)
(2)
(1)
POINT
DE
MESURE
CN12
CN6
CN18
CN14
CN13
CN11
CN5
CN10
CN9
CN8
CN15
CN2
CN7
YEL
BLU
RED
BRN
GRN1
WHT
BLK
GRN2
RED
WHT
N
DANGER
(
DC400V
)
CUT
THE
POWER
SOURCE
AND
WAIT
MORE
THAN
10
MINUTES
BEFORE
SERVICE
WORK.
DO
NOT
TOUCH
THE
SCREWS
AT
SYSTEM
POWER
MODULE
DUE
TO
HIGH
VOLTAGE.
DO
NOT
TOUCH
THE
OTHER
COMPONENTS
WHEN
OPERATING
THE
SERVICE
SWITCH.
CONFIRM
THE
DC
VOLTAGE
AT
THE
MEASURING
POINT
SHOWN
IN
FIGURE
MUST
BE
LESS
THAN
10V.
LIGHTING MODE OF THE SELF-DIAGNOSIS LAMP
MODEL RAC-50WX8, RAC-D18EX3