Table of Contents

Advertisement

Service Manual

Models:
MWM09Y1J/MRM09Y1J
MWM12Y1J/MRM12Y1J
(Refrigerant R410A)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MWM09Y1J and is the answer not in the manual?

Questions and answers

alessandro Bocconcelli
February 17, 2025

my FRiedrich indoor unit model MW24Y3J, sometimes vibrates and makes noise for 2-3 seconds

Subscribe to Our Youtube Channel

Summary of Contents for Friedrich MWM09Y1J

  • Page 1: Service Manual

    Service Manual Models: MWM09Y1J/MRM09Y1J MWM12Y1J/MRM12Y1J (Refrigerant R410A)
  • Page 2 ...............1 ........................1 ......................2 2.1 Specification Sheet ......................2 2.2 Operation Characteristic Curve ..................4 2.3 Capacity Variation Ratio According to Temperature ............4 2.4 Cooling and Heating Data Sheet in Rated Frequency .............5 2.5 Noise Curve ........................5 ................6 3.1 Indoor Unit ........................6 3.2 Outdoor Unit ........................6 ..............7 ......................8 5.1 Wiring Diagram .........................8...
  • Page 3 ......................30 9.1 Error Code List .......................30 9.2 Troubleshooting for Main Malfunction ................38 9.3 2-way, 3-way Valve Appearance ..................47 9.4 Troubleshooting for Normal Malfunction .................54 ..............56 10.1 Indoor Unit ........................56 10.2 Outdoor Unit .........................58 ..................60 11.1 Removal Procedure of Intdoor Unit ................60 11.2 Removal Procedure of Outdoor Unit ................66 ........................70 Appendix 1: Reference Sheet of Celsius and Fahrenheit ............70...
  • Page 4 MWM09Y1J MWM12Y1J MRM09Y1J MRM12Y1J YT1FF(MOTO2) Technical Information...
  • Page 5: Indoor Unit

    MWM09Y1J MWM12Y1J Model MRM09Y1J MRM12Y1J Product Code CB146035101_L13396 CB146035001_L13396 Rated Voltage Power Rated Frequency Supply Phases Power Supply Mode Outdoor Outdoor Cooling Capacity (Min~Max) Btu/h 9000(3500~11000) 11800(3300~12500) Heating Capacity (Min~Max) Btu/h 9800(2500~11000) 13000(3400~13500) Cooling Power Input (Min~Max) 750(220~1100) 1260(260~1340) Heating Power Input (Min~Max)
  • Page 6: Outdoor Unit

    Model of Outdoor Unit MRM09Y1J MRM12Y1J Product Code CB146W0431_L13396 CB146W0451_L13396 ZHUHAI LANDA COMPRESSOR ZHUHAI LANDA COMPRESSOR Compressor Manufacturer/Trademark CO., LTD CO., LTD Compressor Model QXA-A091ZE190 QXA-A091ZE190 Compressor Oil FVC68D FVC68D Compressor Type Rotary Rotary L.R.A. Compressor RLA Compressor Power Input Overload Protector 1NT11L-6233 1NT11L-6233...
  • Page 7 Cooling Heating Condition Condition WB60 °F Indoor:DB 70°F Indoor:DB 80°F WB67 °F Indoor air flow: Super High Indoor air flow: Super High Pipe length:24.6ft Pipe length:24.6ft Compressor Frequency(Hz) Compressor Frequency(Hz) Cooling Heating Condition Condition Indoor:DB 70°F WB60 °F WB67 °F Indoor:DB 80°F Indoor air flow: Super High Indoor air flow: Super High...
  • Page 8 (DB/WB) outdoor unit exchanger indoor unit outdoor unit (Hz) Indoor Outdoor P (MPa) T1 ( T2 ( MWM09Y1J 54 to 57 106 to 109 Super High High MRM09Y1J 80/67 95/– 0.8~1.1 MWM12Y1J 50 to 54 109 to 113 Super High...
  • Page 9 30 1/3 MWM09Y1J MWM12Y1J 21 4/7 3 5/7 Φ2 1/6 Φ2 1/6 1 5/8 Unit: inch 2 3/5 3 2/3 MRM09Y1J MRM12Y1J 10 1/8 21 1/4 33 2/5 12 3/5 11 2/3 21 1/4 Unit: inch Technical Information...
  • Page 10 Outdoor unit Indoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction Accumlator exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Capillary Strainer COOLING HEATING Refrigerant pipe diameter Liquid :1/4" Gas : 3/8" Technical Information...
  • Page 11 Name White Green Jumper cap Yellow Brown COMP Compressor Blue Grounding wire YEGN Yellow/Green Black Violet Orange Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model. MWM09Y1J MWM12Y1J Technical Information...
  • Page 12 MRM09Y1J MRM12Y1J These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit. Technical Information...
  • Page 13 Name Fuse Live wire Communication wire Display interface Jumper cap Up and down swing Ambient temperature sensor Temperature sensor PG feedback 10 PG motor 11 Neutral wire GRJ836-A4 V1.3 2013/3/18/13 Technical Information...
  • Page 14 GRJW819-A3 V1.2 2013/06/25/12 Name Name Name Compressor output port Port of power neutral wire Port of AC fan motor Overload port Live wire Port of DC fan motor Temperature sensor port Port of compressor electric heating belt Port of electronic expansion valve Communication wire port Port of compressor electric heating belt Earthing wire port...
  • Page 15 START / STOP:Press to start or stop operation. :Press to decrease temperature setting. :Press to increase temperature setting. AUTO:Press to set fan speed. MODE:Press to select operation mode (AUTO/COOL/DRY/FAN/HEAT). SENSOR CLOCK:Press it set clock. TIMER ON:Press it to set auto-on timer. AIR SWEEP:Press it set swing angle.
  • Page 16 Press this button to turn on the unit .Press this button again to turn off the unit. Press this button to decrease set temperature. Hold it down for 2 seconds or more to rapidly decrease set temperature. In AUTO mode, set temperature is not adjustable.
  • Page 17 Press this button to activate / deactivate the Turbo function which enables the unit to reach the preset temperature in the shortest time. In COOL mode, the unit will blow strong cooling air at super high fan speed. In HEAT mode, the unit will blow strong heating air at super high fan speed.
  • Page 18 (1)Cooling Mode mark H1 will be shown. The e-heater and indoor fan stop. 1. When room temp-set temp ≤-3.6°F , cooling will stop; *Anti-cold air function Outdoor fan will stop later and indoor fan will operate at set The rotational speed of indoor electromotor is decided based on speed;...
  • Page 19 and D. there are 7 states for the Sleeping mode is available only in cooling and heating modes; Cooling mode: at the base of initial set temperature by remote controller, the set temperature will increase automatically according to people’s coziness within several hours after setting sleep function. Heating mode: at the base of initial set temperature by remote controller, the set temperature will decrease automatically according to people’s coziness within several hours after setting sleep function.
  • Page 20: Frequency Control

    Detect malfunctions of temperature sensor any time. (2) Indoor Pipe Temperature Sensor detect the temperature sensor malfunction. In other times, the temperature sensor malfunction will be detected. (3) Protection of Temperature Sensor 1. When short-circuit occurs to the temperature sensor for 30s: The temperature sensor overheats.
  • Page 21: Input Current Control

    Management within the Zones Stop zone When the temperature reaches the stop zone, stop the compressor and correct abnormality. Drooping zone Start the timer, and the frequency will be drooping. Keep zone Keep the upper limit of frequency. Return / Reset zone Cancel the upper limit of frequency.
  • Page 22: Defrost Control

    Heating Peak-cut Control Outline Heat Pump Only During heating operation, the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must be divided as follows.) Detail 1.Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec.
  • Page 23 3. Fan OFF delay when stopped 4. ON/OFF control in cooling operation 5. Tap control when drooping function is working 6. Fan control in forced operation 7. Fan control in indoor/outdoor unit silent operation 8. Fan control in powerful mode 9.
  • Page 24 Installation and Maintenance...
  • Page 25 Installation and Maintenance...
  • Page 26: Installation And Maintenance

    Space to the wall Space to the wall At least 5 8/9 inch At least 5 8/9 inch Drainage pipe Installation and Maintenance...
  • Page 27 Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install the support of outdoor unit Install wall-mounting (select it according to the actual situation) frame, drill wall holes Connect pipes of indoor Fix outdoor unit...
  • Page 28 Name Name Indoor unit Sealing gum (1) Must follow the electric safety regulations when installing Outdoor unit Wrapping tape the unit. Support of outdoor Connection pipe (2) According to the local safety regulations, use qualified unit power supply circuit and air switch. Drainage pipe Fixing screw Wall-mounting...
  • Page 29 (3) Fix the wall-mounting frame on the wall with tapping screws (ST4.2X25TA) and then check if the frame is firmly installed by (1) Aim the pipe joint at the corresponding bellmouth.(As show pulling the frame. If the plastic expansion particle is loose, in Fig.5) please drill another fixing hole nearby.
  • Page 30 (1) Open the panel, remove the screw on the wiring cover and (1) Bind up the connection pipe, power cord and drain hose then take down the cover.(As show in Fig.11) with the band.(As show in Fig.14) (2) Reserve a certain length of drain hose and power cord for installation when binding them.
  • Page 31 (1) Take sufficient protective measures when installing the (1) Put power connection wire and power wire through the wire- outdoor unit. -passing hole. (2) Make sure the support can withstand at least four times the (2) Remove the wire clip; connect the power connection wire unit weight.
  • Page 32 (1) With leakage detector: (1) The through-wall height of drain hose shouldn't be higher Check if there is leakage with leakage detector. than the outlet pipe hole of indoor unit.(As show in Fig.25) (2) With soap water: (2) Slant the drain hose slightly downwards. The drain hose If leakage detector is not available, please use soap water for can't be curved, raised and fluctuant, etc.(As show in Fig.26) leakage detection.
  • Page 33 When there are several malfunctions, they will be displayed circularly. (1) Hardware malfunction: immediate display; refer to “error code list”; (2) Operation state: immediate display; refer to “error code list”; (3) Other malfunctions: it is displayed after the compressor stops for 200s; refer to “error code list”. Enter display control: press light button successively for 4 times within 3s to display the corresponding malfunction code;...
  • Page 34 Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code 0.5s Display...
  • Page 35 Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code 0.5s Display...
  • Page 36 Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code 0.5s Display...
  • Page 37 Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code 0.5s Display...
  • Page 38 Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code 0.5s Display...
  • Page 39 Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code 0.5s Display...
  • Page 40 Display Method of Indoor Unit Display Method of Outdoor Unit Indicator Display (during Indicator has 3 kinds of display blinking, ON 0.5s and OFF status and during blinking, ON Dual-8 Malfunction A/C status Possible Causes 0.5s) 0.5s and OFF 0.5s Code Name Power...
  • Page 41 Troubleshooting for F1,F2 malfunction the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? Insert the temperature sensor tightly Is malfunction eliminated Is there short circuit due to trip - over of the parts? Make the parts upright Is malfunction eliminated Is the...
  • Page 42 Troubleshooting for H6 malfunction Stir the blade with a tool to see whether the blade rotates smoothly Tighten the screw; reassemble the blade, motor and shaft bearing rubber base sub-assy to make sure there is no foreign object between them Is malfunction eliminated Check if the connection of PG...
  • Page 43 Troubleshooting for C5 malfunction Appearance of Is there jumper cap on the the jumper cap mainboard ? Assemble the jumper cap with the same model Is malfunction eliminated the jumper cap inserted correctly and tightly ? Insert the jumper cap tightly Is malfunction eliminated...
  • Page 44 Troubleshooting for U8 malfunction Re-energize1 minute after de-erergization The unit returns to normal. Conclusion:U8 is displayed due U8 is still to instant energization afte de- displayed energization while the capacitor discharges slowly. The zero-cross detection circuit of the mainboard is defined abnormal.Replace the mainboard with the same model...
  • Page 45: Wiring Diagram

    Start Cut off power supply. Check if connection line of IDU and ODU and the wire inside electric box are correctly connected. Connect the line Correct connection? according to Malfunction eliminated? wiring diagram. Main board matches Match correctly with display board? Main board of Malfunction eliminated? according to product IDU matches with that of ODU?
  • Page 46 Main inspection point: Flow chart of Malfunction diagnosis Energize the unit and wait for 3min Measure voltage between N 1and 3 of indoor wiring block Measure voltage between L and N Voltage > 200V? of outdoor wiring block Voltage > 200V? Normal wiring? Indoor main board error indoor and outdoor...
  • Page 47 Energize the unit and start it Voltage between L and N of indoor wiring block Check the connecting state of the Voltage > 200V? connecting terminal Adjust Reliable connecting connection state Replace main remove the Check power board of indoor error? supply unit...
  • Page 48 Energize the (4) Malfunction diagnosis of startup failure unit and start it Main detection points: Is wiring of compressor correct. Is the stop time of compressor more Start it 3 min later Is the stop time of compressor enough? than 3min Is compressor damaged? Malfunction diagnosis process: Startup failure?
  • Page 49 (6) Diagnosis of overload and discharge malfunction Main detection points: 20min after de-energization Is electric expansion valve well connected? Is it damaged? of complete unit Is refrigerant leaked? Is overload wire connection normal? Is electric Malfunction diagnosis process: expansion valve well connected? Is overload wire reliably connected?
  • Page 50 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Hexagonal wrench (4mm) Open position Flare nut Flare nut Closed position Open position Closed position piping piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works Shaft position Shaft position...
  • Page 51 Liquid side Indoor unit Outdoor unit Clsed 2-way valve Gas side Clsed 3-way valve Vacuum pump OPEN CLOSE – Check the flare connections for gas leakage. – At this time, especially check for gas leakage from the 2-way and 3-way valves stem nuts, and from the service port nut. Installation and Maintenance...
  • Page 52 Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air – Do this quickly so that the gauge ends up indicating 3 to 5kg/ – Remove the valve stem caps and confirm that the valve stems are in the raised position.
  • Page 53 Liquid side Indoor unit Closed Outdoor unit 3-Way valve Gas side Closed 3-Way valve Gas cylinder R410A OPEN CLOSE – Be sure to use a hexagonal wrench to operate the valve stems. – Leave the valve on the gas cylinder closed. –...
  • Page 54 Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE – If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1kg/cm discharge the refrigerant until the gauge indicates 0.5 to 1kg/cm G.
  • Page 55: Vacuum Pump

    Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE – Confirm that the gauge needle has moved toward -76cmHg – Vacuum pump oil. (vacuum of 4 mmHg or less). If the vacuum pump oil becomes dirty or depleted, replenish as needed.
  • Page 56 Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE This is different from previous procedures. – Connect the charge hose which you dis-connected from the Because you are charging with liquid refrigerant vacuum pump to the valve at the bottom of the cylinder. from the gas side, absolutely do not attempt to –...
  • Page 57 Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether it's due to power failure. If yes, No power supply, or poor After energization, operation indicator isn’t bright wait for power recovery. If not, check power connection for power plug and the buzzer can't give out sound supply circuit and make sure the power plug is connected well.
  • Page 58 Possible causes Discriminating method (air conditioner status) Troubleshooting Connect wires according to wiring diagram to Wrong wire connection, or poor Check the wiring status according to circuit make sure all wiring terminals are connected connection diagram firmly Measure the capacity of fan capacitor with an Capacity of the ODU fan motor is universal meter and find that the capacity is out of Replace the capacity of fan...
  • Page 59 MWM09Y1J MWM12Y1J Installation and Maintenance...
  • Page 60 Part Code Description MWM09Y1J MWM12Y1J Front Panel 69700336 69700336 Filter Sub-Assy 69700337 69700337 Screw Cover 69700338 69700338 Membrane 69700339 69700339 Front Case Assy 69700340 69700340 Guide Louver 69700341 69700341 Helicoid Tongue 69700342 69700342 Air Louver 69700330 69700330 Shaft of Guide Louver...
  • Page 61 MRM09Y1J MRM12Y1J Installation and Maintenance...
  • Page 62 Part Code Description MRM09Y1J MRM12Y1J 69700000 69700000 Front Grill 69700273 69700273 Cabinet 69700280 69700280 Axial Flow Fan 69700281 69700281 Fan Motor 69700270 69700270 Chassis Sub-assy 69700164 69700164 Drainage Connecter 69700284 69700284 Compressor Gasket 69700268 69700268 Compressor and Fittings Electric Expansio n Valve Sub- 69700288 69700009 69700289...
  • Page 63 If ON/OFF button is kept pushing ■ for 5 seconds, a forced cooling operation will be carried out for ap- prox. 15 minutes. Pull protrusions on left and right sides of panel with fingers and open front panel all the way. Lift center section of air filter and disengage Left and right filters are...
  • Page 64 Draw out the axial bush. Bend the horizontal louver slightly and then remove it. Support the front panel by one ■ hand, while remove the rotation axis at the upper center by the other hand. Guide Louver Axial bush Hook a finger onto the projection part provided on the both sides of the Left and right filters are...
  • Page 65 Remove a service cover mounting screw. Open service cover upward. A switch for field setting is ■ not provided in particular. screws Remove the 5 screws, in the right and the left, Screw stoppers inside the ■ which fix the main body flap which were equipped in with the front grille.
  • Page 66 Disconnect the Cable Pay attention to the direction ■ clamp of the retainer of the thermistor so that the retainer will not touch the harness (same as the existing models.) Take care not to losw the clip of thermistor Remove Temperature Heat exchanger Heat exchanger thermistor Clip...
  • Page 67 Remove Pipe Clamp Auxiliary piping Piping fixture Auxiliary piping Adjust the pipeline slightly Loosen the screws, Heat exchanger in the right and the left, which fix the Evaporator Assy. Remove Evaporator Assy Installation and Maintenance...
  • Page 68 pressure plate of motor Remove screws of motor p r e s s p l a t e a n d t h e n remove the motor press plate. Shaft cushion rubber base Remove motor, blade and shaft cushion rubber base.
  • Page 69 Procedure Steps Points 1. Features Cable Cross Plate sub-assy Loosen the screw of the cable cross plate sub- assy and remove it. Pull down the stop valve cover and remove it. Valve Cover 2. Remove top panel Top panel Loosen the 3 screws (right, left) and lift the top panel.
  • Page 70 Procedure Points Steps Twist off the screws connecting the grille and the grille panel with screwdriver and then remove the grille. Twist off the screws connecting the panel and the Lift the front panel and motor support, chassis and remove it while pushing the grille with screwdriver and right side panel inwards.
  • Page 71 Procedure Points Steps Fan motor fixing frane Twist off the 4 tapping screws fixing the motor, pull out the pin of leading wire of motor and then remove the motor. Twist off the 2 tapping screws on motor support and 1 Fan motor screws on electric box, pull it upward and then remote the...
  • Page 72 Steps Procedure Points 6. Remove compressor 4-Way valve assy Unsolder the pipeline connected to the compressor. (Release all refrigerant before disassembling the pipeline) Compressor Twist off the 3 foot nuts on compressor and then remove the compressor. Twist off the 2 bolts fixing the gas valve, unsolder the soldering joint between gas valve and air return pipe and...
  • Page 73 Fahrenheit Fahrenheit Fahrenheit display Fahrenheit display Fahrenheit display Fahrenheit Celsius Celsius Celsius temperature temperature temperature 60.8 69/70 69.8 78/79 78.8 62/63 62.6 71/72 71.6 80/81 80.6 64/65 64.4 73/74 73.4 82/83 82.4 66/67 66.2 75/76 75.2 84/85 84.2 Fahrenheit Fahrenheit Fahrenheit display Fahrenheit...
  • Page 74 Pipe Pipe cutter Leaning Uneven Burr A:Cut the pip ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ● Cut the required pipe with pipe cutter. B:Remove the burrs Pipe Shaper ● Remove the burrs with shaper and prevent the burrs from getting into the pipe. Downwards C:Put on suitable insulating pipe Union pipe...
  • Page 75 Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -2.2 138.1 18.75 138.2 3.848 208.4 1.071 -0.4 128.6 69.8 17.93 3.711 210.2 1.039 121.6 71.6 17.14 141.8 3.579 1.009 73.4 16.39 143.6 3.454 213.8 0.98 108.7 75.2 15.68 145.4 3.333 215.6 0.952 102.9 147.2...
  • Page 76 Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -2.2 181.4 25.01 138.2 5.13 208.4 1.427 -0.4 171.4 69.8 23.9 4.948 210.2 1.386 162.1 71.6 22.85 141.8 4.773 1.346 153.3 73.4 21.85 143.6 4.605 213.8 1.307 75.2 20.9 145.4 4.443 215.6 1.269 137.2 147.2...
  • Page 77 Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -20.2 853.5 120.2 18.34 190.4 4.754 -18.4 799.8 51.8 93.42 17.65 192.2 4.609 -16.6 53.6 89.07 123.8 16.99 4.469 -14.8 703.8 55.4 84.95 125.6 16.36 195.8 4.334 660.8 57.2 81.05 127.4 15.75 197.6 4.204 -11.2...
  • Page 78 JF00302172...

This manual is also suitable for:

Mrm09y1jMwm12y1jMrm12y1j

Table of Contents

Save PDF