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Hitachi airHome 400 DH Series Service Manual
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Hitachi airHome 400 DH Series Service Manual

Indoor/outdoor unit
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SERVICE MANUAL
CONTENTS
SPECIFICATIONS
HOW TO USE
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MAIN PARTS COMPONENT
WIRING DIAGRAM
CIRCUIT DIAGRAM
PRINTED WIRING BOARD LOCATION DIAGRAM
BLOCK DIAGRAM
BASIC MODE
REFRIGERATING CYCLE DIAGRAM
AUTO SWING FUNCTION
DESCRIPTION OF MAIN CIRCUIT OPERATION
SERVICE CALL Q & A
DISASSEMBLE & ASSEMBLY PROCEDURE
TROUBLE SHOOTING
PARTS LIST AND DIAGRAM
Instruction manual
To obtain the best performance, please read this instruction manual completely.
คู ่ ม ื อ การใช ้ ง าน
เพื อได ้รั บ การทํ า งานที ดี ท ี สุ ด โปรดอ่ า นคู ่ ม ื อ อย่ า งละเอี ย ด
<PM NO:0802E>
INDOOR UNIT
RAK-DJ18PCASVX
RAK-DJ24PCASVX
OUTDOOR UNIT
Page 9
RAC-DJ18PCASVX
Page 12
Page 38
Page 41
Page 43
Page 47
Page 55
Page 60
Page 61
Page 67
Page 68
Page 69
Page 86
Page 87
RAC-DJ24PCASVX
Page 91
Page 127
Page 1~26
หน ้า 27~54

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Summary of Contents for Hitachi airHome 400 DH Series

  • Page 1 SERVICE MANUAL INDOOR UNIT RAK-DJ18PCASVX RAK-DJ24PCASVX OUTDOOR UNIT CONTENTS SPECIFICATIONS Page 9 RAC-DJ18PCASVX HOW TO USE Page 12 CONSTRUCTION AND DIMENSIONAL DIAGRAM Page 38 MAIN PARTS COMPONENT Page 41 WIRING DIAGRAM Page 43 CIRCUIT DIAGRAM Page 47 PRINTED WIRING BOARD LOCATION DIAGRAM Page 55 BLOCK DIAGRAM Page 60...
  • Page 2 SAFETY DURING REPAIR WORK 1. In order to disassemble and repair the unit in question, be sure to disconnect the power cord plug from the power outlet before starting the work. 2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit.
  • Page 3 WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned). 2.
  • Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of aluminium, stainless steel, etc.) Bare copper wire (for body earth) Working table Resistor 1 M (1/2W) Staple Earth wire Fig. 3. Grounding of the working table Soldering iron Grounding wire Screw stop at the screwed...
  • Page 5 CAUTION Slight fl owing noise of refrigerant in the refrigerating cycle is expected to be heard occasionally in quiet or stop operation and it is normal. When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety.
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  • Page 9 SPECIFICATIONS (WALL TYPE) TYPE INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT MODEL RAK-DJ18PCASVX RAC-DJ18PCASVX RAK-DJ24PCASVX RAC-DJ24PCASVX POWER SOURCE 1 PHASE, 50 Hz, 220 -240V 2,200 (350 - 2,500) TOTAL INPUT 1,600 (250 ~ 1,800) TOTAL AMPERES 7.66 - 7.02 10.53 - 9.65 6.8 (1.5 - 7.3) (kW)
  • Page 10 Direction of Piping Figure showing the Installation of Indoor and Outdoor Unit. CAUTION In case the pipe length is more than the recommended length for chargeless, add refrigerant R32 as below. Do not exceed the maximum pipe length. There are 6 directions allowed, namely, horizontally perpendicular to the unit, Factory...
  • Page 11 Direction of Piping Figure showing the Installation of Indoor and Outdoor Unit. CAUTION In case the pipe length is more than the recommended length for chargeless, add refrigerant R32 as below. Do not exceed the maximum pipe length. There are 6 directions allowed, namely, horizontally perpendicular to the unit, vertically down from right,...
  • Page 12 SAFETY PRECAUTION Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. ● Pay special attention to signs of “ Warning” and “ Caution”. The “Warning” section contains matters which, if not observed strictly, ●...
  • Page 13 PRECAUTIONS DURING OPERATION The product shall be operated under the manufacturer specifi cation and ● not for any other intended use. Do not attempt to operate the unit with wet hands, this could cause fatal ● accident. When operating the unit with burning equipments, regularly ventilate the ●...
  • Page 14 NAMES AND FUNCTIONS OF EACH PART INDOOR UNIT Pre-fi lter To prevent dust from coming into the indoor unit. (Refer page 34) Front panel (Refer page 35) Indoor unit indicators Light indicator showing the operating condition. (Refer page 15) Horizontal defl ector, Vertical defl ector (Air Outlet) Remote controller Send out operation signal to the indoor unit.
  • Page 15 NAMES AND FUNCTIONS OF EACH PART INDOOR UNIT INDICATIONS Timer Lamp (Orange) Operation Lamp (Yellow) This lamp lights when the timer This lamp lights during operation. is working. Wi-Fi Lamp (Blue) Optional Clean Function Lamp (Green) This lamp uses for FrostWash, Mold Guard, Filter Sign.
  • Page 16 NAMES AND FUNCTIONS OF REMOTE CONTROLLER ■ This remote controller controls the operation and timer setting of the room air conditioner. The operating range of the remote controller from the indoor unit is 7m. If indoor lighting is used, the range may be shorter.
  • Page 17 VARIOUS FUNCTIONS ■ Auto Restart Control If there is a power failure, operation will be automatically restarted when the power is resumed with ● previous operation mode and airfl ow direction. (As the operation is not stopped by remote controller.) If you intend not to continue the operation when the power is resumed, switch off the power supply.
  • Page 18 Dry Mode Use the room air conditioner for dehumidifying when the room temperature is over 16°C. When it is under 15°C, the dehumidifying function does not work. Press the Mode Selector button so that the display indicates (Dry). The fan speed is set at Auto. Press (Fan Speed) button to select Silent, Low or Auto fan speed.
  • Page 19 Fan Mode User can use the device simply as an air circulator. Press the Mode Selector button so that the display indicates (Fan) . Press the (Fan Speed) button. (Silent) (Low) (Medium) (Super High) (High) Press the (On/Off) button. Fan operation starts with a beep. START Press the button again to stop operation.
  • Page 20 Timer Reservation ■ ON Timer and OFF Timer are available. Timer Reservation ■ Operation stops at set time Off Timer setting Select the Off Timer by pressing the Button. ● ● Setting time will change according to the below sequence when you press the button.
  • Page 21 Powerful Operation By pressing (Powerful) button during Cool, Dry, Fan or Air Circulation, the air conditioner performs at ● maximum power. During Powerful operation, cooler air blows out from the indoor unit for COOLING operation. ● Press the (Powerful) button during operation. “...
  • Page 22 FrostWash Operation ● The dust and dirt adhere to indoor heat exchanger are some of the causes of the odor. They are washed away by freezing and thawing of the heat exchanger. FrostWash operation can work when the outdoor temperature is 21° to 43°C. ●...
  • Page 23 Mold Guard Operation ● After the cooling operation is stopped, the fan of the indoor unit is dried by fan mode to suppress the generation of mold inside the indoor unit. – Mold Guard Operation period is about 1 hour. –...
  • Page 24 Refresh Mode Operation To slightly reduce air blow temperature of air conditioner and room humidity if unit has been operating for a long period of time for the day. (a) During COOLING operation, press the to allow unit to start REFRESH Operation.
  • Page 25 Power Safe (Max Current Switching) This function limit the maximum current during the operation of air conditioner. It will help to avoid breaker trips if maximum current reaches the breaker limits. In summary, this function limit the electrical current during operation. ■...
  • Page 26 Silent Operation By pressing the (SILENT) button during Cool, Dry, Fan & Air Circulation operation, the fan speed changes to the silent fan speed When button is pressed, ● START “ ” is displayed on the LCD. ● Fan speed changes to silent ●...
  • Page 27 GoodSleep Timer Setting Press the button, and the display changes as shown below. Mode Indication 1 hour interval GoodSleep Timer (Cancel GoodSleep Timer) GoodSleep Timer: The device will continue working for the GoodSleep Timer designated number of hours and then turn off. Point the signal window of the remote controller toward the indoor unit, and press the GoodSleep button.
  • Page 28 Adjusting the Airfl ow Direction Adjust the airfl ow upward and downward. According to operation, the horizontal air defl ector is automatically set to the proper angle suitable for each operation. The defl ector can be swings up and down and also set to the desired angle using the “...
  • Page 29 Initialization of the Built-in airCloud Home Module You can reset the internal settings (restore the factory settings) by remote controller. This operation is valid only for indoor unit with Built-in airCloud Home module. It is invalid when in use with Adapter WiFi module. ■...
  • Page 30 How to Exchange the Batteries in the Remote Controller Remove the cover as shown in the fi gure and take out the old batteries. Push and pull to the direction of arrow Batteries Install the new batteries. The direction of the batteries should match the marks in the case. CAUTION 1.
  • Page 31 How to Reset Filter Sign on the indoor unit Filter sign on the indoor unit will blink with 1s On and 4s OFF. Because cleaning of Air fi lter has not been done for a long time. Clean the Air fi lter. Press Filter button at Off Mode pointing the remote controller towards the indoor unit to reset Filter Sign.
  • Page 32 THE IDEAL WAYS OF OPERATION Suitable Room Temperature Install curtain or blinds It is possible to reduce Warning heat entering the room Freezing temperature is bad for health through windows. and a waste of electric power. Ventilation Do Not Forget To Clean The Pre-Filter Dusty air fi...
  • Page 33 ATTACHING THE AIR PURIFYING FILTERS Open the front panel Pull up the front panel by holding it at both sides ● with both hands. Remove the Pre-fi lter Push upward to release the claws and pull out the ● Pre-fi lter. Air purifying fi...
  • Page 34 MAINTENANCE CAUTION Before cleaning, stop operation and switch off the power supply. PRE-FILTER Clean the Pre-fi lter, as it removes dust inside the room. In case the Pre-fi lter is full of dust, the air fl ow will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean the Pre-fi...
  • Page 35 CLEANING OF FRONT PANEL Remove the front panel and wash with clean water. ● Wash it with a soft sponge. After using neutral detergent, wash thoroughly with clean water. When front panel is not removed, wipe it with a soft dry cloth. ●...
  • Page 36 ■ The following phenomena do not indicate unit FROSTWASH OPERATION failure. It does not wash when outside Refrigerant fl ow noise in the pipe or valve Hissing or fi zzy temperature is less than about 21°C or sounds sound generated when fl ow rate is adjusted. more than 43°C.
  • Page 37 If the unit still fails to operate normally after performing the Please contact your sales agent immediately if the air above inspections, turn the circuit breaker off and contact conditioner still fails to operate normally after the above your sales agent immediately. inspections.
  • Page 38 CONSTRUCTION AND DIMENSIONAL DIAGRAM FOR INDOOR INDOOR UNIT MODEL RAK-DJ18PCASVX, RAK-DJ24PCASVX Unit: mm – 38 –...
  • Page 39 MODEL RAC-DJ18PCASVX – 39 –...
  • Page 40 MODEL RAC-DJ24PCASVX – 40 –...
  • Page 41 MAIN PARTS COMPONENT THERMOSTAT (Room Temperature Thermistor) Thermostat Specifi cations RAK-DJ18PCASVX, RAK-DJ24PCASVX MODEL THERMOSTAT MODEL OPERATION COOL 15.6 (60.1) INDICATION 15.3 (59.5) TEMPERATURE °C 23.6 (74.5) INDICATION 23.3 (73.9) 31.6 (88.9) INDICATION 31.3 (88.3) INDOOR FAN MOTOR Fan Motor Specifi cations MODEL RAK-DJ18PCASVX, RAK-DJ24PCASVX POWER SOURCE...
  • Page 42 RAC-DJ18PCASVX RAC-DJ24PCASVX ASD088CKPA6JK6B GTD141RKQB7JV6B 2M = 2.084 ±7% 2M = 1.867 ±7% CAUTION When the Air Conditioner has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant, check the color of the refrigerant oil inside the compressor. If the color has been changed conspicuously, replace the compressor.
  • Page 43 WIRING DIAGRAM MODEL: RAK-DJ18PCASVX RAK-DJ24PCASVX – 43 –...
  • Page 45 CIRCUIT DIAGRAM Remote controller – 47 –...
  • Page 46 CIRCUIT DIAGRAM MODEL: RAK-DJ18PCASVX, RAK-DJ24PCASVX – 49 –...
  • Page 47 CIRCUIT DIAGRAM MODEL: RAC-DJ18PCASVX MODEL RAC-DH18PCAST – 51 –...
  • Page 48 CIRCUIT DIAGRAM MODEL: RAC-DJ24PCASVX NAME OF Symbol DRAWING No. NAME OF PART RATING MOUNT FORM Symbol DRAWING No. NAME OF PART RATING MOUNT FORM Symbol DRAWING No. RATING MOUNT FORM PART R001 RRTEP010 RCR16CT52A1434F %1/4W MAIN C003 RRCPP068 LE224-FX 0.22u AC310 F-CAPA MAIN 3PUD97578A JUMPER-SEN...
  • Page 49 PRINTED BOARD LOCATION DIAGRAM MODEL: RAK-DJ18PCASVX, RAK-DJ24PCASVX – 55 –...
  • Page 50 MODEL: RAC-DJ18PCASVX Control P.W.B. Marking on P.W.B. (Component side) – 56 –...
  • Page 51 MODEL: RAC-DJ24PCASVX Control P.W.B. Marking on P.W.B. (Component side) – 57 –...
  • Page 52 MODEL: RAC-DJ18PCASVX – 58 –...
  • Page 53 MODEL: RAC-DJ24PCASVX – 59 –...
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  • Page 56 Notes: (1) Condition for entering into Cool Dashed mode. When fan set to “Hi” or “Auto mode” and temperature difference between indoor temperature and set temperature has a corresponding compressor rpm (calculated value in Table 2) larger than CMAX. (2) Cool Dashed will release when i) a maximum 25 minutes is lapsed and ii) room temperature is lower than set temperature –3°C (thermo off) and iii) when room temperature has achieved setting temperature –1°C then maximum Cool Dashed time will be revised to 20 minutes.
  • Page 57 Notes: (1) If the room temperature is (cooling preset temperature) - (1.33°C) or less after 30 seconds from starting the operation, the operation is done assuming as the preset temperature = (room temperature at the time) - (2°C). (2) The indoor fan is operated in the “Lo/Silent” mode. During thermo OFF indoor fan will be OFF for 5 minutes and ON for 1 minute. Indoor fan will go to FWSS (350 rpm). (3) When the operation is started by the themostat turning ON, the start of the indoor fan is delayed 32 seconds after the start of compressor operation.
  • Page 58 MODEL: RAK-DJ18PCASVX, RAC-DJ18PCASVX, MODEL: RAK-DJ24PCASVX, RAC-DJ24PCASVX – 67 –...
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  • Page 60 MODEL: RAK-DJ18PCASVX, RAK-DJ18PCASVX – 69 –...
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  • Page 65 (Not applicable for this model) – 74 –...
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  • Page 67 MODEL: RAC-DJ18PCASVX – 76 –...
  • Page 68 MODEL: RAC-DJ24PCASVX – 77 –...
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  • Page 70 RAC-DJ18PCASVX ± ± ± RAC-DJ24PCASVX ± ± ± – 79 –...
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  • Page 78 Procedure for Disassembly and Reassembly – 87 –...
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  • Page 80 MODEL RAC-DJ18PCASVX – 89 –...
  • Page 81 MODEL RAC-DJ24PCASVX detents detents detents – 90 –...
  • Page 82 MODEL: RAC-DJ18PCASVX RAC-DJ24PCASVX – 91 –...
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  • Page 84 RAC-DJ18PCASVX RAC-DJ24PCASVX – 93 –...
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  • Page 87 SELF-DIAGNOSIS LIGHTING MODE MODEL: RAC-DJ18PCASVX / RAC-DJ24PCASVX ± %) ± %) – 96 –...
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  • Page 94 Service Setting Item used for GRAC SEA model Category 1: Installation HHRC LCD Display Layer1 Layer2 Layer3 Category Function Name Value Category Function Value Disable Card Key Input - A enable Card Key Card Key Input - B enable Installation reserve 04-99 Auto restart Changeover Disable...
  • Page 95 Category 6: HHRC HHRC LCD Display Layer1 Layer2 Layer3 Category Function Name Value Category Function Value Operation Disable selection on HHRC Mode: Air Cir Enable Selection on HHRC Auto Fan Speed Disable selection on HHRC Enable/Disable Enable Selection on HHRC Super-Hi Fan Enable Selection on HHRC HHRC...
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  • Page 97 INDOOR INDEPENDENT MODE ONLY – 106 –...
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  • Page 116 RAC-DJ18PCASVX RAC-DJ24PCASVX – 125 –...
  • Page 117 RAC-DJ18PCASVX / RAC-DJ24PCASVX – 126 –...
  • Page 118 PARTS LIST AND DIAGRAM INDOOR UNIT MODEL : RAK-DJ18PCASVX / RAK-DJ24PCASVX – 127 –...
  • Page 119 MODEL RAK-DJ18PCASVX / RAK-DJ24PCASVX PART NO. Q’TY / UNIT PARTS NAME PMK-DJ18PCASV PWB MAIN (RAK-DJ18PCASVX) PMK-DJ24PCASV PWB MAIN (RAK-DJ24PCASVX) PMK-DJ10PCASV PWB RECEIVER PMK-DJ18PCASV CYCLE ASSY PMK-DJ18PCASV FAN MOTOR PMK-DJ18PCASV FRONT COVER ASSY PMK-DJ18PCASV AIR FILTER PMK-DJ18PCASV FRONT PANEL PMK-DJ18PCASV TANGENTIAL FAN PMK-GJ18PCASV CABINET PMK-DJ10PCASV...
  • Page 120 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL : RAC-DJ18PCASVX – 129 –...
  • Page 121 RAC-DJ18PCASVX MODEL Q’TY / UNIT PART NO. PARTS NAME PMRAC-PH10CMT COMPRESSOR PMRAC-XH18CKTS FAN MOTOR PMRAC-EH10CKT SUPPORT (FAN MOTOR) PMC-DH13PCAST CONDENSER PMRAC-X18CGT TERMINAL BOARD (3P) PMRAC-F10CJ PROPELLER FAN PMC-DH10PCAST CABINET PMRAC-EH10CKT D-GRILL PMRAC-EH10CKT TOP COVER PMRAC-EH10CKT SIDE PLATE (R) PMRAC-EH10CKT SIDE PLATE (L) PMRAC-X13CXK VALVE 4S PMRAC-X13CX...
  • Page 122 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL : RAC-DJ24PCASVX – 131 –...
  • Page 123 RAC-DJ24PCASVX MODEL Q’TY / UNIT PART NO. PARTS NAME PMRAC-PH24CMT COMPRESSOR PMRAC-XH24CKT FAN MOTOR PMRAC-40CNH2 SUPPORT (FAN MOTOR) PMC-DH24PCAST CONDENSER PMRAC-X18CGT TERMINAL BOARD (3P) PMRAC-70YHA PROPELLER FAN PMRAC-DX18CJT CABINET PMRAC-50NPD D-GRILL PMRAC-30MH1 TOP COVER PMRAC-50YHA2 SIDE PLATE (R) PMRAC-40CNH2 SIDE PLATE (L) PMRAC-X13CX VALVE 2S PMRAC-50NH4...
  • Page 124 RAK-DJ18PCASVX / RAC-DJ18PCASVX PM NO. 0802E RAK-DJ24PCASVX / RAC-DJ24PCASVX Printed in Malaysia SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT + OUTDOOR UNIT Refrigeration & Air-Conditioning Division MARCH 2023...

This manual is also suitable for:

Airhome 400 rak-dj18pcasvxAirhome 400 rak-dj24pcasvxAirhome 400 rac-dj18pcasvxAirhome 400 rac-dj24pcasvxAirhome 400 rc-agu1eb0s