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Hitachi RAF-25QH8, Service Manual

The Hitachi RAF-25QH8 AC is a revolutionary cooling solution that offers exceptional comfort during hot summer months. To ensure optimal performance and longevity, it is essential to have the Service Manual at hand. Download the free manual from manualshive.com to efficiently troubleshoot and maintain your unit, ensuring its peak performance all year round.

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Summary of Contents for RAF-25QH8

Page 1: ...MPERES CAPACITY DIMENSIONS mm NET WEIGHT SPECIFICATIONS 750 590 215 15 RAF 25QH8 RAF 35QH8 RAF 50QH8 CONTENTS SPECIFICATIONS 5 HOW TO USE 6 CONSTRUCTION AND DIMENSIONAL DIAGRAM 27 MAIN PARTS COMPONENT 28 WIRING DIAGRAM 29 WIRING DIAGRAM OF THE PRINTED WIRING BOARD 31 BLOCK DIAGRAM 35 BASIC MODE 37 REFRIGERATING CYCLE DIAGRAM 51 DISASSEMBLY ASSEMBLY PROCEDURE 52 DESCRIPTION OF MAIN CIRCUIT OPERATIO...

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Page 6: ... 5 RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

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Page 9: ... 8 RAF 25QH8 RAF 35QH8 RAF 50QH8 INDOOR UNIT ...

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Page 28: ... 27 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

Page 29: ... 28 RAF 25QH8 RAF 35QH8 RAF 50QH8 RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

Page 30: ... 29 RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

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Page 32: ... 33 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

Page 33: ... 35 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

Page 34: ... but other indoor units which is switched on later does not operate while the lamp lights During automatic operation When heating operation is automatically selected for the first indoor unit the next indoor unit will then start to heat Also if cooling or dehumidifying is automatically selected for the first indoor unit the next indoor unit will also start to cool or dehumidify Circulating fan Deh...

Page 35: ...in 1 1 3 min 1 0 33 C 0 C 0 C 0 66 C 1 33 C 26 C 1 C 9 C 350 min 1 550 min 1 650 min 1 800 min 1 800 min 1 950 min 1 1000 min 1 1100 min 1 1100 min 1 500 min 1 630 min 1 800 min 1 950 min 1 1000 min 1 1050 min 1 500 min 1 650 min 1 650 min 1 4500 min 1 4500 min 1 4000 min 1 4000 min 1 3100 min 1 1800 min 1 1100 min 1 800 min 1 800 min 1 900 min 1 1200 min 1 1100 min 1 500 min 1 1 3 min 1 0 33 C 0 ...

Page 36: ... determined by instruction sent from indoor unit and corrected by outdoor unit according to such factors as capacity fan speed number of units being operated outdoor temperature etc If another indoor unit is doing heating operation cooling operation cannot be done ...

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Page 38: ... 45 FDOY_M ...

Page 39: ...higher with the room temperature at 18 C or less and outdoor temperature at 10 C or less 4 Compressor speed is determined by instruction sent from indoor unit and corrected by outdoor unit according to such factors as capacity fan speed number of units being operated outdoor temperature etc If another indoor unit is doing cooling operation dehumidifying operation or fan operation heating operation...

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Page 41: ... 51 3S 4S 3S 4S MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

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Page 47: ... 57 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

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Page 53: ... 63 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

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Page 55: ...uver at the bottom air outlet moves even if the START STOP button is not pressed To ensere correct opening and closing of the deflector and the upper louver will move when power is turned on or the unit is to be operated in order to check its fully opened and closed positions ...

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Page 58: ... 68 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

Page 59: ... 69 Others Communications Error Reset stop MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

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Page 65: ... 75 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

Page 66: ... 76 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 RAF 50QH8 901 RAF 25QH8 901 RAF 35QH8 902 RAS N22V 806 1 UNION 3 RAF 50QH8 902 ATE 0972B RAF 35QH8 901 2 5 kW 3 5 kW 5 0 kW 904 ...

Page 67: ... 77 MODEL RAF 25QH8 RAF 35QH8 RAF 50QH8 RAF 25QH8 902 RAF 35QH8 903 RAF 50QH8 903 ...

Page 68: ...HITACHI PM NO 0423E Printed in Malaysia RAF 25QH8 RAF 35QH8 RAF 50QH8 ...

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