Hitachi RAS-18SX8 Manuel De Maintenance page 189

Self-diagnosis display function (indoor side display)
While the "timer lamp" (orange), the "clean lamp" (yellow), the "mist and air purification lamp" (yellow), or "monitor
lamp" (yellow) of the indoor unit is blinking, troubleshoot the product while referring to the table below.
1. How to count the lamp blinking frequency
・The product will repeat blinking with 2-second
intermissions.
・The blinking speed is as follows: on for 0.35 seconds and
off for 0.35 seconds.
2. If you wish to try another operation while the lamp is blinking, operate the START/STOP button on the remote control unit
twice. The first push will reset the indoor microcomputer, while the second will activate the product
(except for the mode in ※1).
[Cautions]
・There is a failure mode displayed only while the self-diagnosis memory is read (※2). Read and check it as necessary.
・ An erroneous connection (a wrong insertion) of terminals A or B of F cable may go undetected.
DESCRIPTION OF THE SELF-DIAGNOSIS INDICATION
REFER TO THE TABLE BELOW IF THE TIMER INDICATOR
( ORANGE ) IS BLINKING.
LAMP BLINKING MODE
2sec.
2sec.
2sec.
2sec.
2sec.
2sec.
2sec.
2sec.
2sec.
2sec.
2sec.
2sec.
REFER TO THE TABLE BELOW IF THE CLEAN INDICATOR
( YELLOW ) IS BLINKING.
LAMP BLINKING MODE
LIGHTING:4SEC.
OFF :1SEC.
LIGHTING:1SEC.
DECREASING
LIGHT :1SEC.
LIGHT DOWN MODE: LIGHTING / DECREASING LIGHTS / OFF
※IF THE INTERFACE CIRCUIT IS DEFECTIVE WHEN
THE POWER IS TURNED ON , THE SELF-DIAGNOSIS
INDICATION WILL NOT WORK.
※IF THE INDOOR UNIT CAN NOT BE OPERATED AT ALL ,
CHECK THE CONNECTION OF THE CONNECTING CORD.
( REVERSE CONNECTION OR DISCONNECTION )
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MAIN DEFECTIVE
ONCE REVERSING VALVE DEFECTIVE
FORCED OPERATION OF OUTDOOR UNIT
2 TIMES
3 TIMES INDOOR/OUTDOOR INTERFACE DEFECTIVE
5 TIMES POWER RELAY DEFECTIVE
9 TIMES
INDOOR THERMISTOR DEFECTIVE
ABNORMAL ROTATING NUMBERS
10 TIMES
OF DC FAN MOTOR
11 TIMES HIGH VOLTAGE GENERATOR DEFECTIVE
CONNECTING CORD DEFECTIVE
12 TIMES
OUTDOOR DEFECTIVE
13 TIMES
IC401 DEFECTIVE
17 TIMES SWITCH P.W.B. DEFECTIVE
18 TIMES CLEANING UNIT DEFECTIVE
19 TIMES
FAILURE OF THE PELTIER DEVICE
MAIN DEFECTIVE
・FAILURE OF THE CLEANING UNIT
DRIVING MOTOR
・FAILURE OF THE CLEANING UNIT
POSITION DETECTION SWITCH
・THE FRONT PANEL IS OPEN DURING
CLEANING UNIT OPERATION, DURING
ELECTRIC DUST COLLECTOR OPERATION
OR DURING ION MIST OPERATION
LIGHTS FOR 0.35 SEC. AT
INTERVAL OF 0.35 SEC.
manuals search engine
[An example of 5-time blinking]
2-second
intermission
REFER TO THE TABLE BELOW IF MIST・AIR PURIFY
INDICATOR(YELLOW) IS BLINKING.
LAMP BLINKING MODE
・FAILURE OF THE HIGH VOLTAGE
GENERATOR OR ELECTRODE
LIGHTING:4SEC
OFF :1SEC.
・FAILURE OF THE PELTIER DEVICE
・FAILURE OF THE POWER SUPPLY
LIGHTING:4SEC.
CIRCUIT OF PELTIER DEVICE
OFF :3SEC.
REFER TO THE TABLE BELOW IF THE MONITOR INDICATOR
(YELLOW) IS BLINKING.
LAMP BLINKING MODE
COME OFF OR DISCONNECTION OF
THE CONNECTOR CN17
LIGHTING:4SEC.
※2 OFF :1SEC.
THE BLINKING OTHER THAN MENTIONED ABOVE ARE OUTDOOR'S
SELF-DIAGNOSIS INDICATION.
REFER TO OUTDOOR'S LAMP-LABEL FOR DETAILS.
※1
LAMP BLINKING MODE
※2 PEAK CURRENT CUT
2sec. 2 TIMES
※2
2sec.
3 TIMES ABNORMAL LOW SPEED ROTATION
2sec.
4 TIMES
SWITCHING FAILURE
2sec.
5 TIMES
OVERLOAD LOWER LIMIT CUT
2sec. 6 TIMES
OH THERMISTOR TEMP.RISE
2sec.
THERMISTOR ABNORMAL
7 TIMES
2sec.
9 TIMES
COMMUNICATION ERROR
2sec. 10 TIMES
ABNORMAL POWER SOURCE
2sec. 11 TIMES
FAN STOP FOR STRONG WIND
2sec.
12 TIMES
FAN LOCK ERROR
2sec.
13 TIMES EEPROM READ ERROR
REFER TO THE TABLE BELOW IF THE INDOOR UNIT
DOSE NOT WORK AT ALL.
CHECK POINT
FU1 3A-FUSE BLOWN REPLACE THE PART WHICH CAUSED BLOWING/
DISCONNECTION OF 3A-FUSE
COME OFF OR DISCONNECTION
OF THE CONNECTOR FOR
FIX CN16 CONNECTOR
INDICATING P.W.B.
REFER TO THE SERVICE GUIDE FOR
HOW TO DETERMINE THE FAILED PART
FAILURE OF CONTROL P.W.B.
– 222 –
2-second
intermission
MAIN DEFECTIVE
MAIN DEFECTIVE
MAIN DEFECTIVE
※2
※2
※2
※2
ACTION/REPLACEMENT PARTS , etc