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Hitachi RAM-70NP4B, Service Manual

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Hitachi RAM-70NP4B Service Manual Download Page 47

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Summary of Contents for RAM-70NP4B

Page 1: ...ND DIMENSIONAL DIAGRAM 19 MAIN PARTS COMPONENT 20 WIRING DIAGRAM 23 CIRCUIT DIAGRAM 25 BLOCK DIAGRAM 27 BASIC MODE 33 REFRIGERATING CYCLE DIAGRAM 53 DESCRIPTION OF MAIN CIRCUIT OPERATION 54 TROUBLE SHOOTING 68 PARTS LIST AND DIAGRAM 86 After installation 850 800 298 58 W A COOLING CAPACITY DC INVERTER QUADRUPLE SYSTEM MULTI TYPE MODEL POWER SOURCE TOTAL INPUT TOTAL AMPERES SPECIFICATIONS OUTDOOR U...

Page 2: ...r use in repairs or inspection should be accurately calibrated in advance 7 In installing the unit having been repaired be careful to prevent the occurence of any accident such as electrical shock leak of current or bodily injury due to the drop of any part 8 To check the insulation of the unit measure the insulation resistance between the power cord plug and grounding terminal of the unit The ins...

Page 3: ...oring of parts Even rejected goods should be handled in the same way Fig 1 Conductive container 2 When any part is handled uncovered in counting packing and the like the handling person must always use himself as a body earth Make yourself a body earth by passing 1M earth resistance through a ring or bracelet 3 Be careful not to touch the parts with your clothing when you hold a part even if a bod...

Page 4: ...the screwed part using a rag plate Soldering iron Grounding wire Fig 4 Grounding a solder iron Use a high insulation mode 100V 10M or higher when ordinary iron is to be used 7 In checking circuits for maintenance inspection or some others be careful not to have the test probes of the measuring instrument short circuit a load circuit or the like Metal plate of aluminium stainless steel etc Staple ...

Page 5: ...or miss operation and re start in a moment there is occasion that the cooling and heating operation does not start for 3 minutes it is not abnormal and this is the result of the operation of IC delay circuit This IC delay circuit ensures that there is no danger of blowing fuse or damaging parts even if operation is restarted accidentally 5 This room air conditioner should not be used at the coolin...

Page 6: ...WITCH SERVICE SWITCH TRANSFORMER VARISTOR NOISE SUPPRESSOR THERMOSTAT REMOTE CONTROL SWITCH LIQUID CRYSTAL 47 W NO NO JU151XC1 NO YES YES 5 0A G4A NO NO YES NO 450NR YES YES IC NO 2300g UNIT REFRIGERANT CHARGING VOLUME Refrigerant R410A WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE PIPES MAX In case the pipe length is more than 30m add refrigerant R410 at 20gram per every meter exceeds RAM 70...

Page 7: ... TOTAL INPUT W EER B T U hW TOTAL AMPERES A POWER FACTOR MAXIMUM LENGTH OF PIPING STANDARD RAM 70NP4B 1ø 220 240V 50 60Hz 20A 7 00 23 900 2 110 11 32 9 7 8 9 99 8 50 29 010 2 110 13 74 9 70 8 90 99 MAX 60m FOUR UNIT TOTAL CE EMC LVD RAM 70NP4B MODEL W PACKING mm H D cu ft 1 008 848 394 11 89 63 GROSS WEIGHT kg 6 35DX4 9 52DX3 12 70X1 FLARE NUT SIZE SMALL LARGE INDOOR SUCTION TEMPERATURE C COOLING ...

Page 8: ... 7 4 ROOM MULTI SPLIT INVERTER TYPE RAC RAM 70NP4B POSSIBLE COMBINATION TO OPERATE SAME TIME OPERATION ...

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Page 10: ... ABLE TO INSTALL Two three or four indoor units can be installed with one outdoor unit And total nominal cooling capacity should not be more than 11 0kW Be sure to connect two three or four indoor units to this outdoor unit If not condensed water may drop resulting in trouble ...

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Page 17: ... of 1 5kW 1 8kW 2 5kW 3 5kW or 5 0kW 5kW unit Optional flare adaptor for piping is necessary One unit of 1 5kW 1 8kW 2 5kW 3 5kW or 5 0kW 5kW unit Optional flare adaptor for piping is necessary One unit of 1 5kW 1 8kW 2 5kW 3 5kW or 5 0kW 1 5kW 1 8kW 2 5kW 3 5kW unit Optional flare adaptor for piping is necessary ...

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Page 21: ... 20 9 a 0 RAM 70NP4B ...

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Page 23: ... 23 WIRING DIAGRAM MODEL RAM 70NP4B ...

Page 24: ... 25 CIRCUIT DIAGRAM MODEL RAM 70NP4B ...

Page 25: ... 27 BLOCK DIAGRAM MODEL RAM 70NP4B ...

Page 26: ... 28 RAM 70NP4B PRINTED WIRING BOARD LOCATION DIAGRAM Main board component side ...

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Page 33: ...teady speed period but it starts fuzzy control 3 The thermo OFF temperature during cool dash is cooling set temperature including cooling shift 3 C After thermo OFF cool dash is finished and fuzzy control starts 4 The compressor minimum ON time and minimum OFF time is 3 minutes 5 The time limit for which the maximum compressor speed CMAX_M or CMAX2_M during normal cooling can be maintained is less...

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Page 36: ... 43 SFTDSW_M OFTMPW_M ...

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Page 38: ... 46 MODEL RAM 70NP4B ...

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Page 77: ... 85 MODEL RAM 70NP4B ...

Page 78: ... 86 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL RAM 70NP4B ...

Page 79: ...MINAL BOARD 3P 14 PMRAC X13CX 902 4 VALVE 2S 15 PMRAC X18CD S04 1 REACTOR 16 PMRAM 33NP2B S06 1 COIL REVERSING VALVE 17 PMRAM 33NP2B S07 1 REVERSING VALVE 18 PMRAM 53NP2B S07 4 EXPANSION VALVE 19 PMRAM 53NP2B S08 1 EXPANSION VALVE COIL W 20 PMRAM 53NP2B S09 1 EXPANSION VALVE COIL R 21 PMRAM 53NP2B S10 1 FAN MOTOR 22 PMRAM 53NP3B S05 1 EXPANSION VALVE COIL B 23 PMRAM 65QH4 S10 1 THERMISTOR OUTSIDE ...

Page 80: ...S 3 34 PMRAM 72QH5 912 1 STRAINER ST PIPE AS 4 35 PMRAM 72QH5 913 1 SV COVER 36 PMRAM 72QH5 S04 1 CONDENSER 37 PMRAM 72QH5 S14 1 SIDE PLATE R 38 PMRAM 72QH5 S15 1 THERMISTOR PIPE W 39 PMRAM 72QH5 S16 1 THERMISTOR PIPE R 40 PMRAM 72QH5 S20 1 SUPPORT DEF THERMISTOR 41 PMSMARTY235M 902 3 VALVE 3S 42 RAC 2226HV 805 3 COMPRESSOR RUBBER PART NO NO Q TY UNIT PARTS NAME ...

Page 81: ...HITACHI PM NO 0585E Printed in Malaysia RAM 70NP4B ...

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