Mitsubishi Electric M Series Service Manual
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Mitsubishi Electric M Series Service Manual

Mitsubishi Electric M Series Service Manual

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M-SERIES
Air Conditioners
SVZ-KP12,18, 24, 30, 36 NA
SERVICE MANUAL

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  • Page 1 M-SERIES Air Conditioners SVZ-KP12,18, 24, 30, 36 NA SERVICE MANUAL...

  • Page 2: Table Of Contents

    12.8. DC Fan motor (fan motor/indoor controller board) ............50 12.8.1. DC Fan motor measuring points ..............51 12.9. Functions of DIP switch and jumper wire ..............51 13. Disassembly Procedure ......................53 Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 3: Safety Precautions

    The following tools are necessary to use R410A refrigerant. Tools for R410A Gauge manifold Flare tool Charge hose Size adjustment gauge Gas leak detector Vacuum pump adapter Torque wrench Electronic refrigerant charging scale Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 4 Adaptor for reverse flow check ⑥ Refrigerant charge base ⑦ Refrigerant cylinder • Only for R410A • Top of cylinder (Pink) • Cylinder with syphon ⑧ Refrigerant recovery equipment Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 5: Part Names And Functions

    SVZ-KP12,18, 24, 30, 36 NA 2. Part Names and Functions Indoor unit NOTE PLEASE SEE DOWNFLOW KIT MANUALS (DFK-S/DFK-M) FOR INSTALLATION INSTRUCTIONS, DOWNFLOW FAN PERFORMANCE, AND CORRECTED AIRFLOW. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 6: Specifications

    (Low - Mid - High) in. WG 0.30 - 0.50 - 0.80 External static pressure [Pa] [75 - 125 - 200] Sound Pressure dB(A) 32-36-40 35-39-43 (Low - Mid - High) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 7 Units should be installed by licensed electric contractor accordingly to local code requirements. For outdoor units to be connected, refer to the Installation Manual that comes with the units. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 8: Fan Performance And Corrected Airflow

    For downflow fan performance and corrected airflow, please see downflow kit manuals. Table 2. Model code 12 Vertical, Horizontal right, Horizontal left, exclude Downflow position External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 9 SVZ-KP12,18, 24, 30, 36 NA External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 10 Table 3. Model code 18 Vertical, Horizontal right, Horizontal left, exclude Downflow position External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 11 External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Table 4. Model code 24 Vertical, Horizontal right, Horizontal left, exclude Downflow position External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 12 SVZ-KP12,18, 24, 30, 36 NA External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 13 Table 5. Model code 30 Vertical, Horizontal right, Horizontal left, exclude Downflow position External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 14 External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Table 6. Model code 36 Vertical, Horizontal right, Horizontal left, exclude Downflow position External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 15 SVZ-KP12,18, 24, 30, 36 NA External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 16: Air Filter

    SVZ-KP12,18, 24, 30, 36 NA Air filter [0.100] [0.080] A30,36 KP30,36 [0.060] A12,18,24 KP12,18,24 [0.040] [0.020] [353] [706] [1059] [1412] [1766] Airflow rate (m /min)[cfm] Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 17: Sound Pressure Levels

    SVZ-KP12,18, 24, 30, 36 NA 5. Sound Pressure Levels 5.1. Sound pressure level Multi-Position Aux.duct Front side 3-1/4ft. (1m) Measurement location Aux.duct Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 18: Nc Curves

    SVZ-KP12,18, 24, 30, 36 NA 5.2. NC Curves Table 7. Model code 12, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 19 SVZ-KP12,18, 24, 30, 36 NA Table 8. Model code 18, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 20 SVZ-KP12,18, 24, 30, 36 NA Table 9. Model code 24, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 21 SVZ-KP12,18, 24, 30, 36 NA Table 10. Model code 30, External static pressure 0.50 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 22 SVZ-KP12,18, 24, 30, 36 NA Table 11. Model code 36, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 23: Dimensions

    SVZ-KP12,18, 24, 30, 36 NA 6. Dimensions Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 24 (17) (14-13/16) (11-1/8) (8-7/8) 382.6 266.5 (21) (18-13/16) (15-1/8) (10-1/2) Model code 1,010.8 735.5 (39-13/16) (26-13/16) (32-7/16) (29) (14-3/16) 1,113.8 935.5 (43-7/8) (19-1/16) (37-9/16) (31-3/16) (18-3/16) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 25: Wiring Diagram

    TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) LED1 LED(POWER SUPPLY) LED2 LED(REMOTE CONTROLLER SUPPLY) TERMINAL BLOCK TB15 (REMOTE CONTROLLER TRANSMISSION LINE) LED(TRANSMISSION INDOOR-OUTDOOR) LED3 RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 26 At receiving MA transmission power source LED2 Lighting NOTE At transmitting indoor-outdoor units Light- The SWE should not be left turned on LED3 for longer than 10 hours. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 27: Refrigerant System Diagram

    Refrigerant flow in cooling Refrigerant flow in heating Thermistor TH2 Pipe temperature(Liquid) Refrigerant LIQUID pipe connection (Flare) Thermistor TH1 (Return Air temperature) Strainer (#50) Distributor with strainer (#50) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 28: Heater Control

    When using the SPTB1 accessory, take special care when restarting power to the system to ensure that both the indoor unit and outdoor unit are powered up at the same time to avoid triggering a communication error. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 29 Time delay can only be selected with MA controller. If use of a non-MA controller is desired, the time delay must first be selected with the MA controller. Then the non-MA controller can be attached and used. All delay times are approximate. The default time delay setting is 24 minutes. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 30 ) > 2.7 °F [1.5 °C] not increasing faster than 0.9 °F [0.5°C] in 7 min EH2 ON EH1 OFF ⑥ ) < 0.9 °F [0.5°C] EH2 OFF Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 31: Fan Control

    Factory setting While the heater is on, the fan will operate at high speed regardless of the fan setting on the remote controller. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 32: Cn24Relay-Kit-Cm3 (Optional Parts) Installation

    - This connector is used to perform an interlocked operation with a panel heater. Depending on the indoor unit control board specification, connect the cable to CN4Y as appropriate. CN4Y for FAN control (CN24RELAY-KIT-CM3) Wiring: A basic connection method is shown below. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 33 • Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32 ft). • Longer than 10 meters (32 ft) could cause improper operation. • Use a transit relay when extending wiring such as remote wiring. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 34: Humidifier

    Factory setting Remote controller Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 35: Erv (Energy Recovery Ventilation)

    If ERV control is effective when STOP, IDU doesn’t report fan status or PB error (Fan motor error). When fan speed setting by RC is "Auto", Fan speed is fixed to "HIGH". Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 36: Troubleshooting

    When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. Lead wires 12.2. Self-check Refer to the installation manual that comes with each remote controller for details. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 37 Abnormality such as overvoltage, voltage shortage, abnormal U9 / UH and synchronous signal to main circuit / current sensor error Others Other errors (refer to the technical manual for the outdoor unit) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 38: Auto Restart Function

    Initial setting Not available Power failure auto restart Available Indoor unit operating average Indoor temperature detect Indoor unit’s internal sensor Remote controller’s internal sensor Not supported LOSSNAY Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 39 IMPORTANT If the system detects an error that could potentially create a safety hazard, the heater will not operate. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 40: Self-Diagnosis Action Table

    5 Defective indoor there is extreme difference with actual controller board pipe <liquid> temperature, replace indoor controller board. Turn the power off, and on again to operate after check. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 41 • Fan motor is defective. • Indoor controller board is defective. Defective outdoor fan control Overcharge of refrigerant 7 Defective refrigerant circuit (clogs) Bypass circuit of outdoor unit is defective Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 42 ˚C [194 ˚F] or more Open: -40 ˚C [-40 ˚F] or less have defect. refrigerant circuit 5. When no problems are found in 1– Defective indoor 4 above, replace the indoor unit control controller board board. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 43 When “RC E3”or “ERC 00-66”is detecting it, judges different data to be abnormal transmission wire of displayed, noise may be causing 30 continuous times. (Error code: E5) remote controller. abnormality. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 44 Replace the failed motor. b) When the number of rotations is detected to be looseness above the upper limit Motor failure for 30 seconds. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 45: Troubleshooting By Inferior Phenomena

    Defective remote controller if LED 2 is blinking, remote controller is defective; if LED 2 is lit, connection failure of remote controller terminal block etc. has returned to normal. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 46: Test Point Diagram

    • CNXC1: Connect to the indoor controller board • CNXA2: Connect to the indoor power board • CNXB2: Connect to the indoor power board • CNXC2: Connect to the indoor power board Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 47: Indoor Controller Board

    • SWE: Emergency operation • CN3C: Indoor - outdoor transmission (0 - 24 VDC) • SW1: Model selection • CN90: Wireless remote controller • SW2: Capacity setting Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 48: Trouble Criterion Of Main Parts

    Vm (Power supply for motor) Vcc (Power supply for control) Regulator Hall IC Vsp (Speed command voltage) Power PG (Pulse output for rotation) device driver Current detecting resistor Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 49: Thermistor

    (˚C) -20 -10 0 10 20 30 40 50 30°C (86°F) 4.3 k" ˚F -4 14 32 50 68 86 104 122 40°C (104°F) 3.0 k" Temperature Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 50: Dc Fan Motor (Fan Motor/Indoor Controller Board)

    Replace the fan motor. of connector CNMF repeat 0V and 5V? Check the operation of fan. Check the operation of fan. Replace indoor controller board. Replace indoor controller board. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 51: Dc Fan Motor Measuring Points

    Jumper Setting by the dip switch and jumper Functions Remarks wire wire For service board Model settings Model code Service Board Capacity settings Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 52 There is no jumper (JP1) because these models have the ⃝ Without TH5 setting cond./eva. temperature thermistor (TH5). With TH5 Indoor Indoor controller board type  controller ⃝ Factory shipment board type ⃝ Service parts setting Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 53: Disassembly Procedure

    3. Return air thermistor is located as shown in the image inside the control box and is connected to the control board on CN20. Return Air Thermistor Wire Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 54: Coil Assembly

    4. Remove the (1 or 2) brackets that secure the coil, unplug the thermistors by separating the water proof connector in the coil area. Next, slide the coil from the frame. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 55: Blower/Fan Assembly

    2. Remove the (1 or 2) brackets that secure the coil assembly. 3. Unplug CN44 and motor plug (CNMF) from control box. 4. Remove the (2) screws that secure the control box and then remove the control box. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 56 SVZ-KP12,18, 24, 30, 36 NA 5. Remove coil panel and smaller drain panel. 6. Remove the (2) screws that secure the fan assembly and slide out. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 57 This product is designed and intended for use in the residential, commercial and light-industrial environment. MITSUBISHI ELECTRIC US, INC. Toll Free: 800-433-4822 MEUS DOC# MD-1404-K019 Ver.6, September 2024 Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

This manual is also suitable for:

Svz-kp12 naSvz-kp18 naSvz-kp24 naSvz-kp30 naSvz-kp36 na

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