Hitachi SET FREE FSNM Series Service Manual

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SET FREE SERIES

FSNM(E)

https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html

Service manual

Outdoor Units: RAS-(8~12)FSNM(E)

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Page 1 SET FREE SERIES FSNM(E) https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html Service manual Outdoor Units: RAS-(8~12)FSNM(E)
Page 2 https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 3 Contents Service Manual Contents Model codes and descriptions Units installation Piping installation Electrical wiring Control system Available optional functions Test run Troubleshooting Spare parts Servicing Main parts Field work instruction SMGB0059 rev.0 - 04/2009 Contents https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 4: Table Of Contents
Contents Service Manual Model codes and descriptions ____________________________________________ v Units installation _______________________________________________________1 General installation notes _______________________________________________________________ 2 1.2. Transportation and handling _____________________________________________________________ 4 1.2.1. Hanging method _________________________________________________________________________ 4 1.2.2. Center of gravity _________________________________________________________________________ 4 1.3. Outdoor units installation _______________________________________________________________ 5 1.3.1.
Page 5 Contents Service Manual 7.2.1. Alarm code indication of remote control switch _________________________________________________ 72 7.2.2. Troubleshooting by alarm code _____________________________________________________________ 74 7.2.3. Troubleshooting in check mode _____________________________________________________________115 7.2.4. Troubleshooting by means of the 7 segment display ___________________________________________ 121 7.2.5. Running current of the compressor _________________________________________________________ 127 7.2.6.
Page 6 Contents Service Manual 11.7.1. Maximum permissible concentration of the HCFC Gas__________________________________________ 176 11.7.2. Calculation of the refrigerant concentration ___________________________________________________ 176 11.7.3. Countermeasure for the refrigerant leakage according to the KHK standard _________________________ 176 11.8. Maintenance work __________________________________________________________________ 177 11.9. Service and maintenance record _______________________________________________________ 178 11.10.
Page 7: Model Codes And Descriptions
Model codes and decriptions Service Manual Model codes and descriptions Unit code list ¡ Please check by model name your air conditioner type, its abbreviation and reference number MODEL CODIFICATION in this service manual. FSN(2)(E) INDOOR UNITS 4-Way Cassette 4-Way Mini Cassette 2-Way Cassette Ceiling Unit...
Page 8 Model codes and decriptions Service Manual FSN(2)(E) INDOOR UNITS Floor Concealed Duct Wall Floor Enclosure Enclosure Unit Code Unit Code Unit Code Unit Code Unit Code RPK-1.0FSNH2M 60277942 RPI-0.8FSN2E 7E420000 RPIM-0.8FSN2E 7E430000 RPK-1.5FSNH2M 60277942 RPI-1.0FSN2E 7E420001 RPIM-1.0FSN2E 7E430001 RPK-1.0FSN2M 60277941 RPF-1.0FSN2E 7E450001 RPFI-1.0FSN2E 7E460001...
Page 9 Model codes and decriptions Service Manual FSNM(E) OUTDOOR UNITS (SET FREE SIDE FLOW TYPE) Unit Code RAS-8-FSNM(E) 60288308 RAS-10FSNM(E) 60288309 RAS-12FSNM(E) 60288310 Meaning of model codification: Unit Type (Outdoor Unit) Compressor power (HP) 8 -10-12 Set-Free System 2 pipes R410 A refrigerant Series (Side Flow) SMGB0059 rev.0 - 04/2009 Model codes and descriptions...
Page 10 Model codes and decriptions Service Manual Complementary systems ¡ Name Description Code Figure KPI-502E1E 70600001 KPI-802E1E 70600002 KPI-1002E1E 70600003 Energy recovery ventilation units KPI-1502E1E 70600004 KPI-2002E1E 70600005 KPI-3002H1E 70600107 EF-5NE Econofresh kit 7E774148 List of accessories ¡ Name Description Code Figure PC-ART Remote control switch with timer...
Page 11 Model codes and decriptions Service Manual Name Description Code Figure PC-LH3A Wireless remote control switch 60291056 PC-ARH Optional remote controller 60291486 Receiver kit PC-ALH 60291464 (for RCI-FSN2E -on the panel-) Receiver kit PC-ALHD 60291467 (for RCD-FSN2· -on the panel-) Receiver kit PC-ALHZ (for RCI, RCD, RPC, RPI, RPK, RPF(I) - 60291473...
Page 12 Model codes and decriptions Service Manual Name Description Code Figure Buildin g Management System Gateway to LONWORKS systems. 60290874 (max. 64 IU, 8 parameters) HARC-BXE (A) Building Management System HARC-BXE (B) Gateway to LONWORKS systems. 60290875 (max. 32 IU, 16 parameters) Building Management System HC-A64BNP 60291569...
Page 13 Model codes and decriptions Service Manual Name Description Code Figure B-23H4 Adapter for deodorant filter 60199790 F-23L4-K Antibacteria filter 60199791 F-23L4-D Deodorant filter 60199793 F-46L4-D Deodorant filter 60199794 PDF-23C3 Duct connection flange 60199795 PDF-46C3 Duct connection flange 60199796 OACI-232 Fresh-air intake kit 60199797 PD-75 Fresh-air intake kit...
Page 14 Model codes and decriptions Service Manual Name Description Code Figure HR-500 70550101 HR-800 70550102 Energy exchanger for KPI HR-1000 70550103 (heat recovery) HR-1500 70550104 HR-2000 70550105 STL-30-200-L600 70550200 STL-30-250-L600 70550201 Sound attenuator STL-30-300-L600 70550202 (Heat/energy recovery) STL-30-355-L600 70550203 STL-30-450-L600 70550204 SMGB0059 rev.0 - 04/2009 Model codes and descriptions https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 15: Units Installation
Units installation Service Manual Units installation This chapter provides information about the procedures you must follow to install the Set-Free FSNM(E) outdoor units. Contents Units installation ______________________________________________________1 General installation notes ____________________________________________________________ 2 1.2. Transportation and handling __________________________________________________________ 4 1.2.1. Hanging method ________________________________________________________________ 4 1.2.2.
Page 16: General Installation Notes
Units installation Service Manual 1.1 General installation notes  warning Install the outdoor unit with sufficient clearance around it for operation and maintenance as shown in the next pages. Install the outdoor unit where good ventilation is available. Do not install the outdoor unit where exists a high level of oil mist, salty air or sulphurous atmosphere. Install the outdoor unit as far as practical (being at least 3 meters) from electromagnetic wave radiator, such as medical equipment.
Page 17  Note Hitachi indoor units are designed for free air discharge (Static Pressure, Pst=0), except ducted indoor units as RPIM, which require to be connected to discharge air ducts. For these units see flow-static pressure chart. SMGB0059 rev.0 - 04/2009 General installation notes https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 18: Transportation And Handling
Units installation Service Manual 1.2. Transportation and handling Transport the product as close to installation location as practical before unpacking.  cautioN - Do not put any material on the product. 1.2.1. Hanging method When hanging the unit, ensure a balance of the unit, check safety and lift up smoothly. ...
Page 19: Outdoor Units Installation
Units installation Service Manual 1.3. Outdoor units installation  WaRNiNG – Install the outdoor unit with sufficient clearance around it for operation and maintenance as shown in the next figures. – Install the outdoor unit where good ventilation is available –...
Page 20: Installation Location
Units installation Service Manual 1.3.2. Installation location Installation place – Install the outdoor unit where good ventilation is available, and where it is dry. – Install the outdoor unit where the sound or the discharge air from the outdoor unit does not affect neighbors or surrounding vegetation.
Page 21: Service Space
Units installation Service Manual 1.3.3. Service space Install the outdoor unit with a sufficient space around the outdoor unit for operation and maintenance as shown below. Obstacles on inlet side – Upper side is open Single installation Multiple installation * Around sides * Around sides are open are closed...
Page 22 Units installation Service Manual Obstacles on discharge side – Upper side is open Single installation Multiple installation Front side Fit positions “*” with unit front side Note: Mount the airflow (optional part) and Note: Mount the airflow guide (optional open both right and left sides. part) and open right end or left end.
Page 23: Foundations
Units installation Service Manual Multi-row and multiple installations Keep a distance of more than 100mm between other units and do not put obstacles on the right and left sides. Dimension B is 0 < L ≤ 0.5H 600 or more 300 or more as shown beside.
Page 24 Units installation Service Manual – (4) Fix the outdoor unit firmly so that declining, Fixing plate (Field supplied) making noise, and falling down by strong wind or Both sides of the unit fixing earthquake is avoided. can be possible When vibration measures are necessary, add vibration proof rubber.
Page 25: Piping Installation
Piping installation Service Manual Piping installation Contents Piping installation ____________________________________________________ 11 2.1. Piping work considerations __________________________________________________________ 12 2.1.1 Copper pipes and sizes _________________________________________________________ 12 2.1.2 Three principles on refrigerant piping work __________________________________________ 15 2.1.3 Suspension of refrigerant piping ___________________________________________________ 15 2.1.4.
Page 26: Piping Work Considerations
Piping installation Service Manual 2.1. Piping work considerations 2.1.1 Copper pipes and sizes 1. Prepare locally-supplied copper pipes. 2. Select the piping size with the correct thickness and correct material which can have sufficient pressure strength. Use the table below to select the required pipe. Nominal Diameter Thickness Copper type...
Page 27: Piping Connection
Piping installation Service Manual Piping Connection When connecting liquid piping for units with piping longer than 15 meters, apply a piping size of Ø9.53 mm (3/8 inches). Fix the connecting pipe as shown in the following figure using the insulation attached to the Indoor Unit. Fix this part with the attached cord Insulate this part with the...
Page 28 Piping installation Service Manual • Insulation Attach the pipe insulation to each branch using vinyl tape. Attach also insulation to field supplied pipes in order to prevent the capacity decrease according to the ambient air conditions and dewing on the low pressure pipe surface. Field supplied insulation Do not make a gap ...
Page 29: Three Principles On Refrigerant Piping Work
Piping installation Service Manual 2.1.2 Three principles on refrigerant piping work In case of using refrigerant R410A in the refrigeration cycle, the refrigeration oil should be of a synthetic type one. In order to avoid oxidation, pay much careful attention to basic piping work control to avoid infiltration of moisture or dust during the refrigerant piping work.
Page 30: Tightening Torque
Piping installation Service Manual 2.1.4. Tightening torque 1. Flaring connections (smaller than a diameter of Ø19.05) are generally used. However, if incorrect flaring is performed, it will cause serious refrigerant leakage. 2. Shape after Flaring, it should be rectangular and flat, and no uneven thickness, cracks and scratches should exist. Nominal diameter Ød Dimension (inches)
Page 31: Brazing Work
Piping installation Service Manual 2.1.5. Brazing work The most important work in the refrigerant piping installation work is the brazing of the pipes. If it accidentally occurs a leakage due to a careless brazing process, it will cause clogged capillary pipes or serious compressor failure. In order to guarantee a proper brazing neck between different pipes surfaces, accurate pipe dimensions after the expansion process (see the table below): It is important to control the clearance of the pipe fitting portion as shown below.
Page 32 https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 33: Electrical Wiring
Electrical wiriing Service Manual Electrical wiring Contents Electrical wiring _____________________________________________________19 3.1. General check ___________________________________________________________________ 20 3.2. Electrical wiring for the outdoor unit ___________________________________________ 21 3.2.1.Electrical wiring connection for outdoor unit ___________________________________________ 21 3.2.2. Setting the DIP switches for the outdoor unit _________________________________________ 22 3.3.
Page 34: General Check
Electrical wiring Service Manual 3.1. General check DaNGER - Before installing the electrical wiring or before performing a periodical check, turn OFF the main switch to the indoor unit and the outdoor unit. For safety reasons, be sure that the indoor fan and the outdoor fan have stopped.
Page 35: Electrical Wiring For The Outdoor Unit
Electrical wiriing Service Manual 3.2. Electrical wiring for the outdoor unit 3.2.1.Electrical wiring connection for outdoor unit FSNM(E) The electrical wiring connection for the outdoor unit is shown beside. 1. Connect the power supply wires to L1, L2, L3 and N (for 400V\50Hz) for the three-phase power source on the terminal board.
Page 36: Setting The Dip Switches For The Outdoor Unit
Electrical wiring Service Manual 3.2.2. Setting the DIP switches for the outdoor unit Quantity and location of DIP switches Push switch PSW1: manual defrost Push switches PSW2, PSW3: Ckecking by 7-segment  NotE The mark “■” indicates position of dips switches. Figures show setting before shipment or after selection. Not mark “■”...
Page 37 Electrical wiriing Service Manual – DSW2: Optional function setting Setting is required, when optional functions are required Setting before shipment Function setting External input/output selection – DSW3: Capacity setting No setting is required RAS-8FSNM(E) RAS-10FSNM(E) RAS-12FSNM(E) – DSW4 and RSW1: Refrigerant cycle number setting Setting is required.
Page 38 Electrical wiring Service Manual – DSW6: Height difference Setting is required Setting before shipment The indoor unit is located higher than outdoor unit (20 to 30 m) Fine-tuning of heating capacity – JP1~6: Jumper cable Power supply 380-415V 50Hz  ...
Page 39: Common Wiring
Electrical wiriing Service Manual 3.3. Common wiring 3.3.1. Electrical wiring between the indoor unit and the outdoor unit & cautioN Use the shielded twisted pair cable or the shielded pair cable for the transmission cables between the indoor unit and the outdoor unit. Connect the shielded part to the earth screw in the electrical box of the indoor unit as shown below.
Page 40: Electrical Wiring Connection
Electrical wiring Service Manual Electrical wiring connection Models: RAS-8~12FSNM(E) Max. 1 Outdoor Unit / Power Supply Line Models: RAS-8~-48FSN2 Max. 4 Units / Power Supply Line (8 to 12HP) The Power source for outdoor units must be made individually. If not, fire may occur in the worst case. 1 Outdoor Unit / Power Supply Line (14 to 48HP) No.2 system No.1 system...
Page 41: Wire Size
3. The wire sizes marked with  in the table of this page are selected at the maximum current of the unit according to the wire, MLFC (Flame Retardant Polyflex Wire) manufactured by Hitachi Cable Ltd., Japan. 4. Use a shielded cable for the transmitting circuit and connect it to ground.
Page 42 Electrical wiring Service Manual Selection according to Selection according to MLFC EN60 335-1 (at cable temp. of 60 ºC) Current i (A) Wire Size (mm²) Current i (A) Wire Size (mm²) I ≤ 6 0.75 I ≤ 15 6 < i ≤ 10 15 <...
Page 43: Control System
Control system Service Manual Control system This chapter presents the control system flowcharts for the Set-FREE FSNM(E) Outdoor Units series Contents Control system ______________________________________________________29 4.1. Device control system _____________________________________________________________ 30 4.1.1. RAS-8~10FSNM(E) refrigerant cycle control _________________________________________ 30 4.2. Outdoor Units PCB ________________________________________________________________ 32 4.2.1.
Page 44: Device Control System
Control system Service Manual 4.1. Device control system 4.1.1. RAS-8~10FSNM(E) refrigerant cycle control Control subject Cooling process Heating process Defrost operation Purpose Contents Purpose Contents Contents Inverter frequency of 1. Total operation 1. 8Hz/I.U. HP 1. Total operation 1. 8Hz/I.U. HP All compressors are the compressor capacity of the...
Page 45 Control system Service Manual The figure below shows the outline of the control system Example: RAS-10FSNM(E) + Indoor unit Suction gas pressure sensor (PS) Multiple signals Discharge gas pressure sensor (Pd) Single signals Wireless remote control switch Thermistor for inlet air Thermistor for ambient temperature (THM7) Thermistor of discharge air Therm.
Page 46: Outdoor Units Pcb
Control system Service Manual 4.2. Outdoor Units PCB 4.2.1. RAS-8~12FSNM(E) PCB drawing LED INDICATION Power Source for PCB1 Normal LED1 Condition: Activated Abnormal (Red) Condition: Deactivated This LED2 indicates the transmission state between LED2 the PCB1 and PCB2. Normal (Green) Condition: Flickering Abnormal Condition: Activated or Deactivated...
Page 47: Available Optional Functions
Available optional functions Service Manual Available optional functions Contents Available optional functions ____________________________________________33 5.1. Outdoor units ____________________________________________________________________ 34 5.1.1. Setting of external input and output functions ________________________________________ 34 5.1.2. Description of external input signals ________________________________________________ 36 5.1.3. Description of external output signals ______________________________________________ 39 5.1.4.
Page 48: Outdoor Units
Available optional functions Service Manual 5.1. Outdoor units 5.1.1. Setting of external input and output functions On the outdoor unit printed circuit board, there are three input terminals to receive external signals and two output terminals to send signals outwards. These signals are available by setting as shown below. Control Function No.
Page 49 Available optional functions Service Manual In the case that the setting change (only with the mark (*) of the table in the previous page) is required at site, perform the following procedures. 1 Set DSW2-#6 of the outdoor PCB at the “ON” side while the main power to the outdoor unit is being supplied. By 1 Set DSW5-#7 of the outdoor PCB at the “ON”...
Page 50: Description Of External Input Signals
Available optional functions Service Manual 5.1.2. Description of external input signals Input 1 – Fixing heating operation mode (Control function No.1), Input 2 – Fixing cooling operation mode (Control function No.2) In the case that the fixing input terminals of the operation mode on the outdoor unit PCB1 are short-circuited, the operation mode can be fixed at the cooling or heating mode.
Page 51 Available optional functions Service Manual Input 3 – Snow sensor (Control function No.4) In the case that the input terminals of the snow sensor on the outdoor unit PCB1 are short-circuited during compressor stoppage, all the outdoor fan motors are operated at the full speed. However, if the compressor is called for compressor operation, the fan operation is changed to the normal operation.
Page 52: Setting Example
Available optional functions Service Manual Input 3 – Demand current control (Control function No.6 to 9) In the case that the demand input terminals on the outdoor unit PCB1 are short-circuited, the compressor frequency is controlled that the maximum limit of the outdoor running current is set 100%, 80%, 70% and 60%. (The maximum limit of the outdoor unit running current can be selected according to the item “Setting of external input and output functions”.) If the outdoor unit running current decreases beyond the maximum limit, the indoor unit is put under thermo-OFF...
Page 53: Description Of External Output Signals
Available optional functions Service Manual 5.1.3. Description of external output signals The following signals can be picked up from the outdoor PCB. Refer to the table 5.2 for the required main parts. Output 1 – Operating signal (Control function No.1) Auxiliary relay contacting (RYa) is closed during the operation.
Page 54: Optional Functions
Available optional functions Service Manual Output 2 – Compressor ON signal (Control function No.3) Auxiliary relay contacting (RYa) is closed during the compressor operation. – Setting Example Compressor ON Signal at Output 2 (between 1 and 3 pins of CN7) Compressor ON Signal at Output 2 (between 1 and 3 pins of CN16) Auxiliary relay 3P Connector housing...
Page 55 Available optional functions Service Manual     ↓ ↑ ↓ ↑ SEG2 SEG1 SEG2 SEG1 Not prepared Not Available Control of the Not Available indoor unit fan dur- ing Thermo-OFF in heating mode Available Available Long piping setting Not Available Cancelation of Not Available...
Page 56 Available optional functions Service Manual Circulator function at heating thermo-OFF Press “RSW1” and select the setting condition “1” at the circulator function at heating thermo-OFF “ ”. In case that the fan speed is changed to “LOW” at heating Thermo-OFF, there is a case that the room air temperature is too high at heating Thermo-OFF.
Page 57 Available optional functions Service Manual Frequency range (Cooling operation) Frequency range (Cooling operation) Outdoor Outdoor Minimum Maximum Minimum Maximum Unit Unit Outdoor Unit Capacity Minimum Frequency Maximum Frequency Frequency Frequency Frequency Frequency Conditions Conditions Capacity Capacity Conditions (HP) (Hz) (Hz) (Hz) (Hz) (Hz)
Page 58 Available optional functions Service Manual Cancellation of outdoor ambient temperature limit of heating Press “PSW1” and select the setting condition “1” at the cancellation of outdoor ambient temp. limit of heating “ ”. Then, this function can be set. The heating operation is continued under a high outdoor temperature. Operation in heating mode The factory-set limitation of the range Area of operation...
Page 59 Available optional functions Service Manual Change of defrost condition Press “PSW1” and select the setting condition “1” at the change of defrost condition “ ”. Setting condition Standard Specifications Cold area specification When change of defrost condition is NOT set When change of defrost condition is set Temperature Defrosting operation...
Page 60 Available optional functions Service Manual Fixing of demand function Press “PSW1” and select the setting condition “1”, so that the fixing of demand function “dE” can be set. However, it is not necessary to short-circuit the demand input terminals on the outdoor unit PCB. (Refer to the item “Input 3 –...
Page 61 Available optional functions Service Manual Wave function setting Press “PSW1” and select the setting condition “1”, so that the wave function setting “UE”. While this function is activated, the maximum limit of running current is changed from 60% to 100% as shown in the figure.
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Page 63: Test Run
Test run Service Manual Test run Contents Test run ____________________________________________________________49 6.1. __________________________________________ 50 Checking procedure before the test run 6.2. from the outdoor unit side _____________________________________ 52 Test run procedure 6.3. Check list _______________________________________________________________________ 53 6.4. Judgement system for refrigerant amount ______________________________________________ 56 SMGB0059 rev.0 - 04/2009 Test run https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 64: Checking Procedure Before The Test Run
Test run Service Manual 6.1. Checking procedure before the test run Test run should be performed according to the Table 6.2. And use the Table 6.1 for recording test run .  WaRNiNG Do not operate the system until all the check points have been cleared . A) Check to ensure that the refrigerant piping and transmission between outdoor unit and indoor units are connected to the same refrigerant cycle.
Page 65 Test run Service Manual  cautioN Caution for Insulation Resistance If total unit insulation resistance is lower than 1 megohm, the compressor insulation resistance may be low due to retained refrigerant in the compressor. This may occur if the unit has not been used for long periods . 1.
Page 66: Test Run Procedure From The Outdoor Unit Side
Test run Service Manual 6.2. Test run procedure from the outdoor unit side The test run procedure from the outdoor unit side is shown below. You can set this DIP switch while the power source is ON Setting of Dip Switch (before shipment) DSW1 ...
Page 67: Check List
Test run Service Manual 6.3. Check list Check list on test run Client: Installer: Date: Outdoor unit model: Outdoor unit serial No.: Checker: Indoor unit model: Indoor unit serial No. Piping lenght [m] Additional refrigerant charge [kg] 1. General Check item Result Was the DIP switch DSW6 for the piping length in the outdoor unit set? Are the power supply wires of the transmission cable making contacts on the piping?
Page 68 Test run Service Manual 3. Check item after sampling data a. Cooling process (if the outdoor temperature is higher than 15 ºC) Check item Standard Causes Result Is H1 (compressor frequency) Running horsepower of the Low: excessive refrigerant; abnormally low or high? indoor units X 8Hz.
Page 69 Test run Service Manual b. Heating process (if the outdoor temperature is higher than 0 ºC) Check item Standard Causes Result Is oE (outdoor unit expansion valves Total of oE: Low: excessive refrigerant; opening) abnormally low or high when total frequency of High: insufficient refrigerant.
Page 70: Judgement System For Refrigerant Amount
Test run Service Manual 6.4. Judgement system for refrigerant amount You can check the excess or the deficiency of the refrigerant by means of the data that is provided by the check mode of the 7-segment display. The following checking procedure is useful during the test run and the maintenance.
Page 71 Test run Service Manual Checking procedures for heating ¡ Process ” 1. Detect oE (total outdoor unit expansion valve opening) 2. Calculate the total frequency (=H1(Inverter frequency)). Judgement ” - If total oE/Total frequency < 0.8 x Target value = Insufficient refrigerant - If total oE/Total frequency >...
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Page 73: Troubleshooting
Troubleshooting Service Manual Troubleshooting Contents Troubleshooting _____________________________________________________59 7.1. Initial troubleshooting ______________________________________________________________ 60 7.1.1. Emergency operation ___________________________________________________________ 61 7.1.2. Failure of the power supply to the indoor unit and the remote control switch ________________ 62 7.1.3. Abnormal transmission between the remote control switch and the indoor unit ______________ 63 7.1.4.
Page 74: Initial Troubleshooting
Troubleshooting Service Manual 7.1. Initial troubleshooting Checking by means of the 7-segment display Simple checking procedure by means of the 7-segment display 1. Turn on all the indoor units which are connected to the outdoor unit. 2. Turn on the outdoor unit 3.
Page 75: Emergency Operation
Troubleshooting Service Manual 7.1.1. Emergency operation Method of collecting refrigerant (In case that compressor does not operate) Perform only when collecting refrigerant of outdoor unit is required. (Perform the replacing compressor and oil return circuit if necessary.) Process Procedure Remarks Turn OFF the main switch of O.U.
Page 76: Failure Of The Power Supply To The Indoor Unit And The Remote Control Switch
Troubleshooting Service Manual 7.1.2. Failure of the power supply to the indoor unit and the remote control switch The LED and the LCD are not indicated. Not operated If the fuses are blown out or a breaker is activated, investigate the cause of the overcurrent and take the necessary action.
Page 77: Abnormal Transmission Between The Remote Control Switch And The Indoor Unit
Troubleshooting Service Manual 7.1.3. Abnormal transmission between the remote control switch and the indoor unit RUN LED on the remote control switch: Flickering every 2 seconds. Action Phenomenon Cause Check item (Turn OFF the main switch) Disconnection or insufficient contacting Check the cable and the Repair the cable or connect the of the remote control cable...
Page 78: Abnormal Operation Of The Devices
Troubleshooting Service Manual 7.1.4. Abnormal operation of the devices In the case that no abnormality (Alarm Code) is indicated on the remote control switch, and normal operation is not available, take necessary action according to the procedures mentioned below. Action Phenomenon Cause Check item...
Page 79 Troubleshooting Service Manual Abnormal operation of the devices (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Check the setting condition of "thermistor of remote control switch." by means of the optional setting Setting and control: "00": Control by means of the indoor thermistor for the If the thermostat of the remote suction air...
Page 80 Troubleshooting Service Manual Abnormal operation of the devices (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Failure of the Thermistor Check the Thermistor by Replace or Correctly Failure of the Discharge means of the connect the wiring when Air Temp.
Page 81 Troubleshooting Service Manual Abnormal operation of the devices (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Indoor heat load is greater than the cooling capacity Calculate the heat load Use a bigger unit Correctly charge the Gas leakage or shortage Measure superheat refrigerant after repairing of refrigerant...
Page 82 Troubleshooting Service Manual Abnormal operation of the devices (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Check clogging of the outdoor unit heat Remove the clogging exchanger? Obstacles at inlet or the outlet of outdoor unit heat Remove the obstacles Insufficient air flow to exchanger?
Page 83 Troubleshooting Service Manual Abnormal operation of the devices (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Replace the unit with Indoor heat load is greater than the heating capacity Calculate the heat load a bigger unit Correctly charge the Gas leakage or refrigerant after the insufficient refrigerant...
Page 84 Troubleshooting Service Manual Abnormal operation of the devices (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Check the filter for a Remove the clogging clogging Insufficient air flow to Check for any obstacles at the indoor unit heat the inlet or the outlet of the Remove the obstacles exchanger...
Page 85 Troubleshooting Service Manual Abnormal operation of the devices (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Remove the foreign Foreign particles inside of the fan casing Visually inspect it particles Adjust the position of the Indoor unit fan runner is hitting the casing Visually inspect it fan runner Adjust the position of the...
Page 86: Troubleshooting Procedure
Troubleshooting Service Manual 7.2. Troubleshooting procedure 7.2.1. Alarm code indication of remote control switch If the RUN LED flickers for 2 seconds, there is a failure in the transmission between the Indoor Unit and the Remote Abnormal Refrigerant Abnormal Indoor Control Switch.
Page 87 Troubleshooting Service Manual Code Category Content of Abnormality Leading Cause Incorrect Setting of Outdoor and Indoor Unit Incorrect Setting of Capacity Code. Existence of the same Indoor Unit No. in the same Incorrect Setting in Indoor Unit No. System Refrigerant Cycle Failure of Indoor Unit PCB.
Page 88: Troubleshooting By Alarm Code
Troubleshooting Service Manual 7.2.2. Troubleshooting by alarm code Alarm code Description Activation of the safety device in the indoor unit The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 89 Troubleshooting Service Manual Alarm code Description Activation of the safety device in the outdoor unit The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are indicated on the display of the outdoor unit PCB1.
Page 90 Troubleshooting Service Manual Action Phenomenon Cause Check item (Turn OFF the main switch) Check the heat exchanger Remove the dust or the for dust or for clogging clogging Check the air filter for dust Remove the dust Insufficient air flow to the heat exchanger Check for any obstacles at (Outdoor heat exchanger during the cooling the inlet or the outlet of the...
Page 91 Troubleshooting Service Manual Action Phenomenon Cause Check item (Turn OFF the main switch) Check for clogging Remove the clogging Check the connect wiring and Replace the connector the connectors Faulty or malfunction of the Check the operation sound Replace the coil expansion valve from the coil Check the discharge gas...
Page 92 Troubleshooting Service Manual Alarm code Description Abnormal transmission between the indoor units and the outdoor unit The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 93 Troubleshooting Service Manual From previous page Is LED3 (yellow ON, Is LED3 on PCB even if CN2 of PCB is Faulty PCB removed? Check other Indoor Units Check the wiring between the Is LED 3 (yellow) on PCB outdoor unit and the indoor flickering more than once in 10 units units or the fuse (EF1) seconds?
Page 94 Troubleshooting Service Manual Action Phenomenon Cause Check item (Turn OFF the main switch) Measure the voltage by means Power failure or no power supply Supply the power of the tester Check the insulation material for Remove the short circuit and Short circuit between wires breaks replace the fuse...
Page 95 Troubleshooting Service Manual Alarm code Description Abnormal transmission between Inverter PCB and Outdoor Unit PCB The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 96 Troubleshooting Service Manual Alarm code Description Abnormality of picking up phase signal The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 97 Troubleshooting Service Manual Alarm code Description Excessively low or high voltage for the inverter The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The alarm code is displayed on the display of the outdoor unit PCB1.
Page 98 Troubleshooting Service Manual Alarm code Description Decrease of discharge gas superheat The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 99 Troubleshooting Service Manual Position of the Thermistor Characteristics of thermistor Characteristics of thermistor Thermistor ref. Display Drive Number of Unit HP Thermistor position (a) compressors Resistance of thermistor (kΩ) THM8 Inverter 8~12HP d1 THM9 14~16HP d2 THM12 18~28HP d3 Constant speed THM13 30~36HP...
Page 100 Troubleshooting Service Manual Alarm code Description Excessively high discharge gas temperature at the top of the compressor chamber The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 101 Troubleshooting Service Manual Position of the Thermistor Position of the Thermistor Characteristics of thermistor Thermistor ref. Thermistor ref. Display Display Thermistor characteristics Drive Drive Number of Number of Unit HP Unit HP Thermistor position (a) Thermistor position (a) compressors compressors Resistance of THM8 THM8...
Page 102: Troubleshooting
Troubleshooting Service Manual Alarm code Description Abnormal operation of thermistor for the indoor unit air inlet temperature (air inlet thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 103 Troubleshooting Service Manual Alarm code Description Abnormal operation of the thermistor for the indoor discharge air temperature (air outlet thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 104 Troubleshooting Service Manual Alarm code Description Abnormal operation of the thermistor for the indoor unit heat exchanger liquid refrigerant pipe temperature (freeze protection thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 105 Troubleshooting Service Manual Alarm code Description Abnormal operation of the thermistor for the indoor unit heat exchanger gas refrigerant pipe temperature (gas piping thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 106 Troubleshooting Service Manual Alarm code Description Activation of the protection device for the indoor fan motor (RCI) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB1.
Page 107 Troubleshooting Service Manual Alarm code Description Activation of the protection device for the indoor fan motor (RPK) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 108 Troubleshooting Service Manual Alarm code Description Activation of the protection device for the indoor fan motor (except RCI and RPK) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 109 Troubleshooting Service Manual Alarm code Description Abnormal operation of the high-pressure sensor for the outdoor unit The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 110 Troubleshooting Service Manual Description Alarm code Abnormal operation of the thermistor for the outdoor temperature (outdoor unit ambient thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 111 Troubleshooting Service Manual Description Alarm code Abnormal operation of thermistor for discharge gas temperature on the top of compressor chamber The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 112 Troubleshooting Service Manual Alarm code Description Abnormal operation of the thermistor for the evaporating temperature during the heating process (outdoor unit) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 113 Troubleshooting Service Manual Alarm code Description Abnormal operation of the low-pressure sensor for the outdoor unit The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 114 Troubleshooting Service Manual Alarm code Description Incorrect capacity setting or combined capacity between Indoor Units and Outdoor Unit The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 115 Troubleshooting Service Manual Alarm code Description Incorrect indoor number setting The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 116 Troubleshooting Service Manual Alarm code Description Abnormality of picking up circuit for protection (Outdoor Unit) The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 117 Troubleshooting Service Manual Alarm code Description Activation for protecting the system from the low compression ratio The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 118 Troubleshooting Service Manual Alarm code Description Activation for protecting the system from excessively low suction pressure The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 119 Troubleshooting Service Manual Alarm code Description Activation for protecting the system from excessively high discharge pressure The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 120 Troubleshooting Service Manual Alarm code Description Activation for protecting the system from excessively low suction pressure (protection from the vacuum operation) The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 121 Troubleshooting Service Manual Alarm code Description Activation of inverter overcurrent protection device (1) The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 122 Troubleshooting Service Manual Alarm code Description Activation of inverter overcurrent protection device (2) The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 123 Troubleshooting Service Manual Alarm code Description Abnormality of current transformer The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 124 Troubleshooting Service Manual Alarm code Description Inverter error signal detection The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 125 Troubleshooting Service Manual Alarm code Description Increase in the inverter fin temperature The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 126: Inverter Failure
Troubleshooting Service Manual Alarm code Description Inverter failure The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 127 Troubleshooting Service Manual Alarm code Alarm code Description Description 56 57 58 Abnormal operation of DC fan motor protection Abnormal operation of DC fan motor protection The RUN LED flickers and “ALARM” is displayed on the remote control switch. The RUN LED flickers and “ALARM” is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section.
Page 128: Compressor Protection
Troubleshooting Service Manual Alarm code Description Compressor protection This alarm code is displayed when one of the following alarms occurs three times within six hours. If the outdoor unit operates continuously without removing the cause of the alarm, the compressor may be seriously damaged. Alarm Code: Content of Abnormality Tripping of the protection device in the outdoor unit...
Page 129: Troubleshooting In Check Mode
Troubleshooting Service Manual 7.2.3. Troubleshooting in check mode Use the ‘OK’ switch of the remote control in the following cases: 1. When the RUN LED is flickering. 2. To trace back the cause of the malfunction after restarting from the stoppage while the RUN LED is flickering.
Page 130: Temperature Indication
Troubleshooting Service Manual Although the wireless controller is used for the wall type  NotES: indoor unit with the built-in receiver part, you can check the 1. The unit does not operate by pressing the operation alarm code by connecting the PC-ART. switch.
Page 131 Troubleshooting Service Manual Indication of micro-computer input/output Part name Relay Heating thermo ON Alarm Micro-computer input/  Relay for drain pump (MD) and/or Cooling thermo ON dew heater (EHW). output in indoor unit Relay for electric heater (CEH) ↓ Y211 Relay for 4-way valve Y52C1 Relay for compressor...
Page 132 Troubleshooting Service Manual Compressor pressure/frequency indication Discharge pressure H 18 (high) (x 0.1 MPa) ↓ Suction pressure (low) H2 04 This is an indication for internal information for the remote (x 0.01 MPa) control switch. This does not have any specific meaning ↓...
Page 133 Troubleshooting Service Manual Contents of the Check mode 2 When more than three indoor units are connected to one remote control switch, the latest data of only the first three indoor units that are connected serially are displayed. If you press the part " ...
Page 134 Troubleshooting Service Manual Compressor pressure/frequency indication Discharge pressure 99 18 (high) (x 0.1 MPa) ↓ Suction pressure (low) 9A 04 (x 0.01 MPa) ↓ This indicates the internal information for the remote control 9b 44 Control information switch. This does not have any specific meaning ↓...
Page 135: Troubleshooting By Means Of The 7 Segment Display
Troubleshooting Service Manual 7.2.4. Troubleshooting by means of the 7 segment display Simple checking by 7-segment display Turn ON all Indoor Inits connected During auto-addressing, the following items can be checked using the to the Outdoor Unit outdoor unit’s on-board 7-segment LED display: 1 Disconnection of power supply to the indoor unit.
Page 136 Troubleshooting Service Manual  Note: Shadowed items are applicable only to FSN2 series Item Indication Data Values Units Total of Thermo-ON indoor unit o P 3 2 0 0 ~ 9999 x1/8 HP capacity Running frequency of inverter 0 ~ 115 compressor MC1 Number of running 0 ~ 5...
Page 137 Troubleshooting Service Manual Item Indication Data Values Units Discharge gas temp. on the top  d 5 1 ~ 142 ºC of compressor MC5 (TD5) (for 38 to 48HP) -46 ~ 80 Evaporating temperature TE1  E 1 ºC (-127 = Open circuited) at heating (127 = Short circuited) Evaporating temperature TE2...
Page 138 Troubleshooting Service Manual Item Indication Data Values Units  L O0 Indoor unit heat exchanger liquid pipe temperature (freeze -62 ~ 127 ºC protection) (from 0 to 63)  L 63  G O0 Indoor unit heat exchanger gas -62 ~ 127 ºC pipe temperature.
Page 139 Troubleshooting Service Manual Item Indication Data Values Units Discharge gas temp. decrease 0: not in operation c 1 5 protection degeneration control 1: in operation Discharge gas temp. increase 0: not in operation c 1 6 protection degeneration control 1: in operation Current protection 0: not in operation c 1 7...
Page 140 Troubleshooting Service Manual Item Indication Data Values Units (Hystory No. 1) Integrated hours at alarm in n o 01 The latest failure indicated n o 02 A C 48 (Hystory No. 2) Cause of stoppage Failure history i  2 ITC indication (Hystory No.
Page 141: Running Current Of The Compressor
Troubleshooting Service Manual 7.2.5. Running current of the compressor Inverter primary current The inverter primary current is estimated from the running current of the compressor MC1 displayed on the 7 segment display, as chart. 380~415V 25 – 20 – Upper limit 15 –...
Page 142 Troubleshooting Service Manual Cause code of stoppage for Fan Controller (content of check item “FC”) Code Cause Automatic stoppage of the transistor module (IPM Error) (overcurrent, decrease voltage, increase temperature) Instantaneous overcurrent Abnormal inverter fin thermistor Electronic thermal activation Inverter voltage decrease (Insufficient Voltage) Voltage increase Abnormal Inverter transmission Reset of micro-computer for inverter...
Page 143: Protection Control Code On The 7-Segment Display
Troubleshooting Service Manual 7.2.6. Protection control code on the 7-segment display 1. Protection control code is displayed on 7-segment when a protection control is activated. 2. Protection control code is displayed while function is working, and goes out when released. 3.
Page 144: Activating Condition Of The Protection Control Code
Troubleshooting Service Manual 7.2.7. Activating condition of the protection control code To monitor the conditions such as the temperature change and others, the control of the frequency and other controls are performed by the protection control in order to prevent the abnormal operations. The activating conditions of the protection control are shown in the table below: ...
Page 145 Troubleshooting Service Manual Code Protection control Activating condition Remarks Vacuum/discharge gas In Case of Ps<0.09MPa for over 12 minutes, or When it activates three times in one hour, the temperature increase discharge gas temperature ≥ 132°C for over ten alarm codes “47” (Ps) or “08” (Discharge gas) retry minutes or discharge gas temperature ≥...
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Page 147: Spare Parts
Spare parts Service Manual Spare parts Contents Spare parts ________________________________________________________133 8.1. RAS-8~12FSNM(E) Structural and cycle parts ______________________________________ 134 8.2. RAS-8~12FSNM(E) Electrical parts _______________________________________________ 136 SMGB0059 rev.0 - 04/2009 Spare parts https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 148: 12Fsnm(E) Structural And Cycle Parts
Spare parts Service Manual 8.1. RAS-8~12FSNM(E) Structural and cycle parts 40 41 35 36 58-1 58-2 58-4 58-3 39-1 39-2 39-3 59-1 33 34 59-3 16 17 18 59-2 Connecting Pipe for Gas Line (Accessory) 66 67 68 SMGB0059 rev.0 - 04/2009 Spare parts https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 149 Pressure Sensor Saginomiya, NSK-BD020F-102 (for Suction Side) Vibration Absorber Thermo Attaching Plate Oil Heater 40.8W Screw SUS, M5 Soundproof Cover HITACHI Label Rubber Cap Thermistor Heat Exchanger Lower Side Thermistor Heat Exchanger Lower Side Thermistor Heat Exchanger Upper Side Accessory Pipe...
Page 150: 12Fsnm(E) Electrical Parts
Spare parts Service Manual 8.2. RAS-8~12FSNM(E) Electrical parts View from P View from Q 13 14 15 1 2 3 SMGB0059 rev.0 - 04/2009 Spare parts https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 151 Spare parts Service Manual Part Name Remarks Part Name Remarks Attaching P-Plate Power Plate Assy Assy Power Plate Attaching P-Plate Radiation Fin Assy Diode Module Attaching P-Plate Transistor Module Assy Printed Circuit PV041-S for Inverter Attaching P-Plate Board Printed Circuit PO081-S Plastic Material Collar...
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Page 153: Servicing
Servicing Service Manual Servicing Contents Servicing __________________________________________________________139 9.1. Outdoor Unit FSNM(E) ____________________________________________________________ 140 9.1.1. Removing service cover ________________________________________________________ 140 9.1.2. Removing air outlet grille _______________________________________________________ 140 9.1.3. Removing upper cover _________________________________________________________ 140 9.1.4. Removing the lower part of service cover and rear cover ______________________________ 141 9.1.5.
Page 154: Outdoor Unit Fsnm(E)
Servicing Service Manual 9.1. Outdoor Unit FSNM(E) Remove the main parts according to the following procedures. To reassemble, perform the procedures in reverse. To prevent contamination of the refrigerant with water or foreign particles, do not expose to the atmosphere for long periods. If necessary, seal pipe ends using caps or tape.
Page 155: Removing The Lower Part Of Service Cover And Rear Cover
Servicing Service Manual 9.1.4. Removing the lower part of service cover and rear cover 1 Remove the service cover according to the item “Removing service cover”. 2 Remove five (5) screws fixing the lower part of service cover and remove the lower part of service cover by pulling towards front side.
Page 156: Removing Electrical Box
Servicing Service Manual  NotES: 1 Fix the motor wire with the plastic tie or the cord clamp. If not, it may cause the disconnection to the fan. 2 Mount the rubber bush at the partition plate when inserting the motor wire through the partition plate. If not, it may cause the disconnection to the fan motor lead wire.
Page 157 Servicing Service Manual – PCB5: PCN203, CN201 (for DC Fan Motor) – PCB3: PCN404 (for AC Fan Motor) 7 Disconnect the compressor wires from the compressor terminal box. 8 Reassemble the electrical box in the reverse order of removing procedures. Screw Screw Screw...
Page 158: Removing Compressor
Servicing Service Manual 9.1.7. Removing compressor 1 Remove the service cover and the lower part of the service cover according to the item “Removing service cover” and the item “Removing the lower part of service cover and rear cover”. In case that the outdoor unit is installed to the wall closely, remove the outdoor unit from the wall.
Page 159 Servicing Service Manual Thermistor holder Holder Td Thermistor Thermistor fixing plate Holder for Td Thermistor Indication of terminal number Compressor Compressor wires Terminal box cover Details for compressor terminals Fix it with screw Compressor wires (3 wires) 6 Remove the suction pipe and discharge pipe from the compressor. Isolate the wires and electrical components to protect from the burner flame at brazing.
Page 160 Servicing Service Manual Cover pipes with Suction pipe wet cloth Discharge pipe Wire is caught on the spring Vibration-proof rubber A Hook Vibration-proof Oil heater Oil heater rubber B lead line Spring Hook Compressor position Vibration-proof rubber A   ...
Page 161: Removing High Pressure Switch
Servicing Service Manual 9.1.8. Removing high pressure switch 1 Remove the service cover according to the item “Removing Service Cover”. 2 Collect the refrigerant from the check joint according to the item “Removing Compressor”. 3 Pull out the fasten terminals. Remove the high pressure switch from the brazing part of the discharge pipe.
Page 162: Removing High Pressure Sensor And Low Pressure Sensor
Servicing Service Manual 9.1.9. Removing high pressure sensor and low pressure sensor 1 Remove the connector for the pressure sensor wiring from PCB1  NotE: Remove the connector firstly. If not, the wiring may be damaged. 2 Remove the refrigerant piping for the high pressure sensor or low pressure sensor by use of two spanners. Wire twisting should be within 3 winds Tightening position (shadowed) Spanner size: 14 mm...
Page 163: Removing Reversing Valve Coil And Solenoid Valve Coil (Sva, Svf)
Servicing Service Manual 9.1.11. Removing reversing valve coil and solenoid valve coil (SVA, SVF) 1 Remove the service cover according to the item “Removing service cover”. 2 Open the power plate according to the item “Opening electrical box (Power plate)”. Check to ensure the LED201 (Red) of the inverter PCB (PCB2) is OFF.
Page 164: Removing Electronic Expansion Valve Coil
Servicing Service Manual 9.1.12. Removing electronic expansion valve coil 1 Remove the service cover according to the item “Removing service cover”. 2 Open the power plate according to the item “Opening electrical box (Power plate)”. Check to ensure the LED201 (Red) on the inverter PCB (PCB2) is OFF. ...
Page 165: Removing Reversing Valve
Servicing Service Manual 9.1.13. Removing reversing valve 1 Remove the service cover and rear service cover according to the item “Removing service cover” and the item “Removing lower part of service cover and rear cover”. 2 Collect the refrigerant from the check joint according to the item “Removing compressor”. 3 Remove the reversing valve coil according to the item “Removing reversing valve coil and solenoid valve coil”.
Page 166: Removing Electronic Expansion Valve
Servicing Service Manual 9.1.14. Removing electronic expansion valve 1 Remove the service cover and rear cover according to the item “Removing service cover” and the item “Removing the lower part of service cover and rear cover”. 2 Collect the refrigerant from the check joint according to the item “Removing compressor”. 3 Remove the coil according to the item “Removing electronic expansion valve coil”.
Page 167: Removing Solenoid Valve
Servicing Service Manual 9.1.15. Removing solenoid valve 1 Remove the service cover and rear cover according to the item “Removing service cover” and the item “Removing the lower part of service cover and rear cover”. 2 Collect the refrigerant from the check joint according to the item “Removing compressor”. 3 Remove the solenoid valve coil according to the item “Removing reversing valve coil and solenoid valve coil”.
Page 168: Remove The Control Pcb (Pcb1)
Servicing Service Manual 9.1.16. Remove the control PCB (PCB1) 1 Remove the service cover according to the item “Removing service cover”. 2 Disconnect all the wires connected with the control PCB (PCB1). 3 Clamp the hook of the four (4) holders by long-nose pliers and remove by sliding toward front side. ...
Page 169: Removing Inverter Components
Servicing Service Manual 9.1.18. Removing inverter components  Danger Do not touch the electrical parts when LED201 (Red) on the PCB2 is ON to avoid an electrical shock.  Notes 1. When replacing the transistor module (IPM) and diode module (DM) on heat radiation fin, slightly apply the heat conducting silicon grease (Manufacturer: Shin-Etsu Chemical Co., Ltd, Product No.: G-746) over the fin contact surface.
Page 170: Diode Module
Servicing Service Manual Middle part of holder Holder Collar Bush Screw (M3) PCB2 and IPM (Transistor module) Screw (M5) Fixing screw Fixing screw for transistor for transistor module (M4) module (M4) Diode module Screw for PCB2 Screws (M5) (M3) Fixing screw Fixing screw (M5) (M5)
Page 171: Removing Other Inverter Components
Servicing Service Manual 9.1.19. Removing other inverter components  Danger Do not touch the electrical parts when LED201 (Red) on the PCB2 is ON to avoid an electrical shock. 1 Remove the service cover according to the item “Removing service cover”. 2 Open the power plate according to the item “Opening electrical box (Power plate).
Page 172 https://splitsystema48.ru/instrukcii-po-ekspluatacii-kondicionerov.html...
Page 173: Main Parts
Main parts Service Manual Main parts Contents Main parts _________________________________________________________159 10.1. Inverter ________________________________________________________________ 160 10.1.1. Specifications of inverter _______________________________________________________ 160 10.1. Inverter ________________________________________________________________________ 160 10.1.1. Specifications of inverter _______________________________________________________ 160 10.1.2. Inverter time chart ____________________________________________________________ 162 10.1.3. Protective Function ____________________________________________________________ 163 10.1.4.
Page 174: Inverter
Main parts Service Manual 10.1. Inverter 10.1. Inverter 10.1.1. S pecifications of inverter 10.1.1. S pecifications of inverter Aplicable model Aplicable model RAS-8~48FSN2 RAS-(8~12)FSNM(E) Aplicable power source Aplicable power source 3 Phase. 380V, 415V 50 Hz 3 Phase. 380V, 415V 50 Hz Output voltage Output voltage 380-415V 380-415V...
Page 175 Main parts Service Manual Protection Function Overcurrent Protection for Inverter Detecting current is more than 150% of the rated current. Rated Current x 150% Rated Current x 105% Time *) Internal protection Transistor module or IPM (1) Short-Circuit Trip of Arm *) (2) Instantaneous Overcurrent Trip *) (3) Instantaneous Overcurrent Trip (4) Electronic Thermal Trip...
Page 176: Inverter Time Chart
Main parts Service Manual 10.1.2. Inverter time chart Main Circuit Power Source Frequency Frequency All bit 1 All bit 1 Operation HIGH Frequency Instruction Output Voltage Soft Start-Stop (Frequency) The changing speed dependes on the outer setting Failure Signal Output Activation of Protection Device Transmit error...
Page 177: Protective Function
Main parts Service Manual 10.1.3. Protective Function 1. Excessive High or Low Voltage for Inverter a) Level of Detection - When the voltage of direct current is greater than 750 V, abnormalities are detected. - When the voltage of direct current is smaller than 350 V, abnormalities are detected. b) Function When abnormalities are detected, the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1.
Page 178: Overload Control
Main parts Service Manual b) Function When abnormalities are detected, the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1. c) Cancellation of Protection Function Transmission for signal code of stoppage cause is canceled when a stopping order is issued or main power source is cut off.
Page 179: Thermistor
Main parts Service Manual 10.2. Thermistor 10.2.1. Position of thermistor (Example: RAS-30FSN2) Thermistor for outdoor ambient temp. Thermistor for outdoor ambient temperature Thermistor holder Thermistor Heat exchanger fixing plate Thermistor holder Heat exchanger liquid Thermistor pipe fixing plate Thermistor for Heat Auxiliary electrical dicharge gas temp.
Page 180 Main parts Service Manual – If the compressor upper part temperature increases exceeding 132 ºC even if an electronic expansion valve opens, the compressor is stopped, in order to protect the compressor. d. If the temperature of the upper part of the compressor exceeds 132 °C for 10 minutes during the cooling process, the compressor will stop according to the following method.
Page 181: Electronic Expansion Valve
Main parts Service Manual 10.3. Electronic expansion valve 10.3.1. Electronic expansion valve for the outdoor unit Micro-computer Pulse motor Pulse signal 2-Phase permanent magnetic pulse motor Control 0 to 500 pulse by 1 pulse Refrigerant flow control Needle Precise control Items Items Specifications...
Page 182: High-Pressure Control
Main parts Service Manual 10.4. Pressure sensor High-pressure control Low-pressure control A high-pressure sensor detects the high pressure during A low-pressure sensor detects the suction pressure during the heating process. The PID control with the operation the cooling process. The PID control with the operation capacity of the indoor units controls the compressor capacity of the indoor units controls the compressor frequencies.
Page 183: Scroll Compressor
Main parts Service Manual 10.5. Scroll compressor 10.5.1. Reliable mechanism for low vibrating and low sound 1. The rotating direction is definite. 2. The pressure inside of the chamber is high pressure, and the surface temperature of the chamber is 60 °C to 110 °C.
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Page 185: Field Work Instruction
Field work instruction Service Manual Field work instruction Contents Field work instruction ________________________________________________171 11.1. and the wiring connection _____________________________ 172 Checking the power source 11.2. Burnt-out compressor due to an insufficient refrigerant charge _____________________ 172 11.3. when a long piping is applied _______________________ 173 Insufficient cooling performance 11.4.
Page 186: Checking The Power Source And The Wiring Connection
Field work instruction Service Manual 11.1. Checking the power source and the wiring connection Check the following items in the case of abnormal operation: Check item Procedure Is the breaker of the Check the secondary voltage of the breaker and the fuse by means of a tester. fuse cut out? Is the secondary Disconnect the secondary side of the transformer and check the voltage by means of a tester.
Page 187: Insufficient Cooling Performance When A Long Piping Is Applied
Field work instruction Service Manual 11.3. Insufficient cooling performance when a long piping is applied Question and answer for the field work Example 2: Insufficient cooling performance when a long piping is applied Phenomenon Sufficient cooling was not available for an indoor unit that was located at the farthest position. Cause If the location of an outdoor unit is 20 meters lower than the location of the indoor units, resetting of the DIP switch DSW6 is required.
Page 188: Not Cooling Well Due To Insufficient Installation Space For The Outdoor Unit
Field work instruction Service Manual 11.5. Not cooling well due to insufficient installation space for the outdoor unit Question and answer for the field work Example 5: Not Cooling Well due to Insufficient Installation Space for Outdoor Unit Phenomenon Cooling operation was well performed through the intermediate season. However, the cooling operation was not well available when the outdoor temperature was higher than 35°C.
Page 189: Guideline For Selecting The Drain Pipe For The Indoor Unit
Field work instruction Service Manual 11.6. Guideline for selecting the drain pipe for the indoor unit Method for selecting the drain pipe diameter 1. Calculation of the Drain Flow Volume Calculate that the drain flow volume is approximately 3 (I/hr) per 1HP of the nominal capacity of the indoor unit. For Example: Common drain pipe for four 2.5HP indoor units.
Page 190: Caution With The Refrigerant Leakage
Field work instruction Service Manual 11.7. Caution with the refrigerant leakage The designers and the installers have the responsibility to follow the local codes and the local regulations that specify the safety requirements against the refrigerant leakage. 11.7.1. Maximum permissible concentration of the HCFC Gas The refrigerant R410A, which is charged in the SET-FREE FSN system, is an incombustible non-toxic gas.
Page 191: Maintenance Work
Field work instruction Service Manual 11.8. Maintenance work For the indoor unit and the outdoor unit 1. Fan and fan motor – Lubrication: All the fan motors are prelubricated and sealed at the factory. Therefore, no lubrication maintenance is required. – Sound and vibration: Check for abnormal sounds and vibrations.
Page 192: Service And Maintenance Record
Field work instruction Service Manual 11.9. Service and maintenance record Check item Action Judgement Is the service area sufficient? Is there a short circuit of the discharged air? Any heat influence? Is the ground wire connected? Refrigerant piping Good Not good Fixing the units Good Not good...
Page 193: Service And Maintenance Record By Means Of The 7-Segment Display
Field work instruction Service Manual 11.10. Service and maintenance record by means of the 7-segment display 11.10.1. Data Sheet for Checking by 7-Segment Display FSNM Customer’s Name: ____________________________ Date: ________________________ Outdoor Unit Model (Serial No. RAS- (Serial No. RAS- (Serial No. Operation mode Test Run Start Time Data Collect Start Time...
Page 194: Pump-Down Method For Replacing The Compresso
Field work instruction Service Manual 11.10.2. Pump-down method for replacing the compressor Procedure Remarks Turn off the main switch of the outdoor unit. Remove the covers, the thermistor, the crankcase Make sure that the terminal part of the detached power heater, the power wirings, and other items according supply wires is not exposed by the winding insulation tape to the chapter "Removing the Parts of the Oudoor...
Page 195 Field work instruction Service Manual Procedure Remarks Check for a leakage of the check valve on the – When you stop the compressor for replacing: discharge gas side: – You can check the leakage of the check valve – DSW4-4 (Enforced stoppage of the compressor) by means of the Ps variation because the SVA opens so →...
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Page 198 Shimizu-shi, Shizuoka-ken, Japan ISO 9001 Certified by JQA, Japan ISO 14001 Certified by JQA, Japan Hitachi Air Conditioning Products (M) Sdn. Bnd. Lot No. 10, Jalan Kemajan Bangi Industrial Estate 43650 Bandar Baru Bangi, Selangor Darul Ehsan, Malaysia Certification ISO 9001, Malaysia Certification ISO 14001, Malaysia SMGB0059 rev.0 - 04/2009 - Printed in Spain...

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