SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS August 2023 No. OCH823 TECHNICAL & SERVICE MANUAL Indoor unit [Model Name] [Service Ref.] PKFY-MS10VLM-E.TH PKFY-MS10VLM-E Notes: PKFY-MS10VLM-ET.TH PKFY-MS10VLM-ET • This manual describes only service data of the indoor units. PKFY-MS15VLM-E.TH PKFY-MS15VLM-E PKFY-MS15VLM-ET.TH PKFY-MS15VLM-ET PKFY-MS20VLM-E.TH PKFY-MS20VLM-E PKFY-MS20VLM-ET.TH PKFY-MS20VLM-ET...
SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING Read the OPERATION MANUAL carefully before operation. Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation. Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
[1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
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[4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
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(3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere.
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a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; •...
Unit Electronic weighing scale [3] Service tools Use the below service tools as exclusive tools for R32 refrigerant. Tool name Specifications Gauge manifold · Only for R32 · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3 MPa·G or over. Charge hose ·...
PARTS NAMES AND FUNCTIONS 2-1. Indoor unit Filter Air intake Front Panel Emergency operation switch Operation indicator lamp Louver Air outlet Vane Remote control receiving section 2-2. Wired Remote Controller <PAR-41MAAB> Wired remote controller function The functions which can be used are restricted according to each model. : Supported : Unsupported PAR-41MAAB...
REFRIGERANT SYSTEM DIAGRAM Refrigerant flow in cooling Refrigerant flow in heating Pipe temperature detection thermistor/gas (TH23) Gas pipe Flare Strainer (#50mesh) Pipe temperature detection thermistor/liquid (TH22) Liquid pipe Strainer Heat exchanger (#100mesh) Linear expansion valve Room temperature detection Strainer thermistor (TH21) (#100mesh) Unit: mm (inch) Gas pipe...
TROUBLESHOOTING 8-1. COUNTERMEASURES FOR ERROR DURING TEST RUN If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Refer to the connected outdoor unit service manual in order to determine the nature of the abnormality and apply corrective measure.
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8-2. HOW TO CHECK PARTS Parts name Checkpoints Room temperature Disconnect the connector then measure the resistance with a multimeter. detection thermistor (TH21) (At the ambient temperature 10 to 30°C) Pipe temperature detection thermistor/liquid (TH22) Normal Refer to “8-2-1. Thermistor”. Pipe temperature detection 4.3 to 9.6 kΩ...
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8-2-1. Thermistor <Thermistor characteristic graph> < Thermistor for lower temperature > Room temperature detection thermistor (TH21) Thermistors for Pipe temperature detection thermistor/liquid (TH22) lower temperature Pipe temperature detection thermistor/gas (TH23) Thermistor R =15 kΩ ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 0°C...
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8-2-3. DC Fan motor (fan motor/indoor controller board) Check method of indoor fan motor (fan motor/indoor controller board) Notes · High voltage is applied to the connector (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connecter (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller board and fan motor.) Self check Conditions : The indoor fan cannot rotate.
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<Output pulse signal and the valve operation> The output pulse shifts in below order. Output Output Closing a valve : 1 → 2 → 3 → 4 → 1 (Phase) Opening a valve : 4 → 3 → 2 → 1 → 4 Ø1 •...
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8-3. FUNCTION OF DIP SWITCH The black square ( ) indicates a switch position. Operation by switch Effective Switch Pole Function Remarks timing Thermistor Built-in remote <Intake temperature Indoor unit Address board controller detection> position <Initial setting> Filter clogging Provided Not provided Filter sign indication 2,500 hr...
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The black square ( ) indicates a switch position. Effective Switch Pole Function Remarks timing (High ceiling) Under Address board operation (Standard) <Initial setting> suspension It follows as the left table. (Silent) SW11 SW12 SW11 Address board 1s digit address <Initial setting>...
DISASSEMBLY PROCEDURE Be careful when removing heavy parts. NOTE: Turn OFF the power supply before assembly. OPERATION PROCEDURE PHOTOS/FIGURES 1. REMOVING THE PANEL Photo 1 (1) Insert the driver to the hole at VANE LOWER shaft and VANE UPPER shaft VANE UPPER slide the VANE LOWER shaft (2 places each).Push VANE Front panel...
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OPERATION PROCEDURE PHOTOS/FIGURES 3. REMOVING THE ADDRESS BOARD, THE INDOOR Photo 4 CONTROLLER BOARD, THE WIRELESS CONTROLLER BOARD, LED BOARD Holder of wireless remote Switch board holder controller board and LED board (Holder of switch board) (1) Remove the panel and the corner box. (Refer to procedure 1) Address board (2) Remove the front and side electrical box covers (2 screws...
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OPERATION PROCEDURE PHOTOS/FIGURES 6. REMOVING THE INDOOR FAN MOTOR AND THE Photo 8 LINE FLOW FAN Lead wire of pipe thermistor (1) Remove the panel and the corner box. (Refer to procedure 1) (2) Remove the electrical box (Refer to procedure 2) and the Motor band nozzle assembly (Refer to procedure 4).
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OPERATION PROCEDURE PHOTOS/FIGURES 8. REMOVING THE HEAT EXCHANGER AND LEV Photo 12 (1) Remove the panel and the corner box (Refer to procedure 1). Heat exchanger (2) Remove the electrical box (Refer to procedure 2) and the nozzle assembly (Refer to procedure 4). (3) Remove the water cover.
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OPERATION PROCEDURE PHOTOS/FIGURES 11. REMOVING THE R32 SENSOR Photo 16 (see the bottom) (1) Remove the panel and corner box. (Refer to procedure 1) Screw of the (2) Remove the electrical box covers. (Refer to procedure 2) R32 sensor (3) Disconnect the R32 sensor connector (CNSA) on the indoor controller board.
REMOTE CONTROLLER 10-1. REMOTE CONTROLLER FUNCTIONS <PAR-41MAAB> Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
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Display The main display can be displayed in two different modes: ˝Full˝ and ˝Basic˝. The initial setting is ˝Full˝. To switch to the ˝Basic˝ mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. Operation Vane · 3D i-see · Vent. (Lossnay) High power Comfort Manual vane angle Vertical air direction Horizontal air direction 3D i-see Sensor Timer menu Timer...
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Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Refrigerant system check Maintenance information Collect model names and serial No. Model name input Serial No.
Main menu list Main Setting and display items Setting details menu Operation Vane · 3D i-see · Vent. Vane: Use to set the vertical air direction. (Vane.Vent. (Lossnay)) Louver: Use to set the horizontal air direction. 3D i-see Sensor: This setting is available only for the air conditioners that support easy setting function of motion sensing air direction.
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Main Setting and display items Setting details menu Initial Basic Main/Supervisor For a system that requires supervisor remote controller, set the remote setting setting controller to "Supervisor" from this setting. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...
<PAR-SL97A-E> Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Fan Speed button (Changes fan speed) Timer Off button...
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<PAR-SL101A-E> Controller interface Transmission area Remote controller display Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...
10-2. ERROR INFORMATION When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, date and time of occur- Error information rence, model name, and serial number will appear. Error code 2502 The model name and serial number will appear only if the informa-...
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• Checking the error information While no errors are occurring, page 2/2 of the error information can be Maintenance menu viewed by selecting ˝Error information˝ from the Maintenance menu. Error information Filter information Errors cannot be reset from this screen. Cleaning Main menu: Cursor...
10-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Main Main menu *At the main display, the menu button and select ˝Service˝ to make Service the maintenance setting. 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
10-4. TEST RUN 10-4-1. PAR-41MAAB 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Test run˝ with the F1 or F2 button, and press the [ ] button. 2.
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10-4-2. PAR-SL97A-E Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ. TEST RUN 1. Turn on the main power to the unit. TEST RUN 2.
10-5. FUNCTION SETTING 10-5-1. PAR-41MAAB Settings menu 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Function setting Lossnay Select ˝Setting˝ from the Service menu, and press the [ ] button. Service menu: Cursor Select ˝Function setting˝, and press the [ ] button.
10-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Check˝ with the F1 or F2 button, and press the [ button. 2. Select ˝Error history˝ with the F1 or F2 button, and press Check menu the [ ] button.
10-7. SELF-DIAGNOSIS 10-7-1. PAR-41MAAB 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [ ] button. Service menu: Select ˝Diagnosis˝ from the Check menu, Cursor and press the [ ] button.
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10-7-2. PAR-SL97A-E < Malfunction-diagnosis method at maintenance service> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK • ˝CHECK˝ lights, and refrigerant address ˝00˝ blinks. CHECK display • Check that the remote controller's display has stopped before continuing. Temperature button TEMP...
10-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select ˝Service˝ from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select ˝Check˝ from the Service menu, Service menu: and press the [ ] button.
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