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Mitsubishi Electronics OCH461 manual

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Table of contents for the manual

  • Page 1

    TECHNICAL & SER VICE MANUAL CONTENTS 1. P ART NAMES AND FUNCTIONS .......... 2 2. SPECIFICA TION ..................................... 4 3. OUTLINES AND DIMENSIONS .............. 6 4. WIRING DIAGRAM ................................. 7 5 . REFRIGERANT SYSTEM DIAGRAM .......... 8 6. MICROPROCESSOR CONTROL ........... 9 7. TROUBLESHOOTING ........[...]

  • Page 2

    2 1 P ART NAMES AND FUNCTIONS Indoor unit Wireless remote controller ON/OFF TEMP FA N VA N E TEST RUN AUTO ST OP AUTO ST ART h min LOUVER MODE CHECK RESET SET CLOCK MODEL SELECT NOT A VAILABLE CHECK TEST RUN °C AMPM AMPM °F V ANE CONTROL button Used to change the air flow CLOCK button RESET button SET button ON/OFF button The unit is turned ON an[...]

  • Page 3

    3 3 Wired remote controller °F°C °F°C ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SA T ON OFF Hr AFTER FIL TER FUNCTION ONL Y1Hr. WEEKL Y SIMPLE AUTO OFF P AR-21MAA ON/OFF FIL TER CHECK OPERA TION CLEAR TEST TEMP . MENU BACK DA Y MONITOR/SET CLOCK ON/OFF ● ● Display Section For purposes of this explanation, all parts of the display [...]

  • Page 4

    4 2.3 8,000 0.03 0.15 2.6 9,000 0.03 0.15 Note : Unit converter kcal/h = kW × 860 Btu/h = kW × 3,412 cfm = m 3 /min × 35.31 lb = kg/0.4536 *Above specification data is subject to rounding variation. Service Ref. Power source Cooling capacity (Nominal) Heating capacity (Nominal ) External finish External dimension H × W × D Net weight Heat exch[...]

  • Page 5

    5 5 Parts name Service Ref. Symbol TH21 TH22 TH23 FUSE MF C1 MV LEV TB2 TB5 TB15 Resistance 30°F/15.8k  , 50°F/9.6k  , 70°F/6.0k  , 80°F/4.8k  , 90°F/3.9k  , 100°F/3.2k  Resistance 30°F/15.8k  , 50°F/9.6k  , 70°F/6.0k  , 80°F/4.8k  , 90°F/3.9k  , 100°F/3.2k  Resistance 30°F/15.8k  , 50°F/9.6k [...]

  • Page 6

    6 OUTLINES AND DIMENSIONS 3 Detailed figure dwg (ABC) (Knockout hole) 5/32(4) 1-31/32(50) 3/32(2.5) 5/8(16) 1-1 1/32(34) 13/32(10) 13/32(10) 1-25/32(45) 5° 3° 31/32(24.4) 45° Knockout hole for left piping 2-1/8(54) 3-19/32(91.5) 1-25/32(45) 3/32(2.5) 5/8(16) 1-31/32(50) 13/32(10) Knockout holt for under piping Knockout hole for remote control wi[...]

  • Page 7

    7 WIRING DIAGRAM 4 Mark Meaning LED1 Main power supply Main power supply (indoor unit: 208-230V) power on lamp is lit Function LED on indoor board for service ON OFF 1234 MODELS SW2 P06 ON OFF 1234 MODELS SW2 P08 <Fig. 1> LED2 Power supply for MA-Remote controller Power supply for MA-Remote controller on lamp is lit Legend Symbol I.B CN32 CN5[...]

  • Page 8

    8 5 REFRIGERANT SYSTEM DIAGRAM Strainer (#100mesh) Strainer (#100mesh) Strainer (#100mesh) Heat exchanger Room temperature thermistor TH21 Gas pipe temperature thermistor TH23 Liquid pipe temperature thermistor TH22 Gas pipe Liquid pipe Flare Linear expansion valv e Gas pipe PKFY -P06/08NBMU-E { 12.7 (1/2”) Liquid pipe { 6.35 (1/4”) Models Item[...]

  • Page 9

    9 6 MICROPROCESSOR CONTROL PAR-21MAA ON/OFF FILTER CHECK OPERA TION CLEAR TEST TEMP . MENU BACK DA Y MONITOR/SET CLOCK ON/OFF ûF ûC ûF ûC ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SAT ON OFF Hr AFTER FILTER FUNCTION ONLY1Hr . WEEKLY SIMPLE AUTO OFF INDOOR UNIT CONTROL 6-1. COOL OPERA TION <How to operate> Press POWER ON/OFF butt[...]

  • Page 10

    10 Control modes Control details 1-1. Thermo regulating function (Function to prevent restarting for 3 minutes) Setting the Dry thermo by the thermo regulating signal and the room temperature (TH21). Dry thermo ON Room temperature desired temperature + 2°F Dry thermo OFF Room temperature desired temperature 1-2. Freeze prevention control No contro[...]

  • Page 11

    11 Control modes Control details Set by remote controller . Remarks 1. Fan Ty p e Fan speed notch 4 speeds type [Low], [Mid2], [Mid1], [High] 2. V ane (up/down vane change) Same as the control performed during the COOL operation, but with no restriction on the vane's downward blow setting · Same control as COOL operation PAR-21MAA ON/OFF FILT[...]

  • Page 12

    12 Control modes Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature desired temperature -2°F ···Thermo ON • Room temperature desired temperature ···Thermo OFF 1. Thermoregulating function Remarks 2-1. Hot adjust mode The fan controller becomes the hot adjuster mode for the fol[...]

  • Page 13

    13 → Control modes Control details 2. Fan Remarks 2-3. Thermo OFF mode When the thermoregulating function changes to OFF , the indoor fan operates in [Extra low]. 2-4. Heat defrosting mode The indoor fan stops. (1) Initial setting: OFF → HEA T···[last setting] When changing the mode from exception of HEA T to HEA T operation ···[Downward [...]

  • Page 14

    14 TROUBLESHOOTING 7 7-1. HOW TO CHECK THE P ARTS PKFY -P06NBMU-E PKFY -P08NBMU-E Parts name Check points Disconnect the connector then measure the resistance with a tester . (At the ambient temperature 50°F~86°F) Disconnect the connector then measure the resistance value with a tester . (Coil temperature 68°F) Linear expansion valve (LEV) Refer[...]

  • Page 15

    15 15 7-1-2. Liner expansion valve 7-1-1. Thermistor 4 Φ 4 3 6 5 Φ 3 2 Φ 2 1 Φ 1 Φ 4 Φ 3 Φ 2 Φ 1 Controller board Drive circuit Connector(CN60) DC12V Brown Red Blue Orange Y ellow White M 4 6 2 3 5 1 Blue Brown Y ellow Orange Red White Linear expansion valve <Thermistor characteristic graph> Room temperature thermistor (TH21) Liquid p[...]

  • Page 16

    16 6 5 4 3 2 1 LED 1k Ω Symptom Check points Operation circuit failure of the micro processor Disconnect the connector on the controller board, then con- nect LED for checking. When power is turned on, pulse signals will be output for 10 seconds. There must be some defects in the operation circuit if the LED does not light while the signals are ou[...]

  • Page 17

    17 7-2. Function of Dip switch PKFY -P06NBMU-E PKFY -P08NBMU-E 1 2 3 4 5 6 7 8 9 10 1~6 1 2 3 4 5 6 7 8 Thermistor<Room temperature> position ON OFF Filter clogging detection Provide Not prov ide Filter cleaning sign 2,500 hr 100 hr Fresh air intake Not effective Not effective Switching remote controller display Thermo ON signal indication F [...]

  • Page 18

    18 J41, J42 Wireless remote controller P air No. Jum pe r <Initial setting> P atter n A Setting pattern J41 J42 Indoor controller jumper wire P air No. of wireless remote controller Initial setting A B D C — Cut Cut — — — Cut Cut 0 1 3 2 — — — P air No.4-9 of wireless remote controller is setting pattern D . ON/OFF TEMP FA N VA [...]

  • Page 19

    19 7-3. TEST POINT DIAGRAM 7-3-1. Indoor controller board PKFY -P06NBMU-E PKFY -P08NBMU-E CN3A Connected to the MA-Remote controller Between 1 to 3 8.7-13V DC (Pin 1 (+)) CN29 Pipe temperature thermistor/Gas (TH23) CN21 Pipe temperature thermistor/Liquid (TH22) CN90 Connected to the wireless remote controller board (W .B) CN60 Linear expansion valv[...]

  • Page 20

    20 12 3 4 56 78 9 10 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 7-3-3. Address board PKFY -P06NBMU-E PKFY -P08NBMU-E SW1 Function setting SW12 Address setting 10ths DIGIT SW1 1 Address setting 1s DIGIT SW14 Branch No. FUSE 6A 250V CN53P Connected to the indoor controller board (CN53M) Between 1 to 2 24-30V DC (non-polar[...]

  • Page 21

    1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROM THE INST ALLA TION PLA TE When there is removing plate (1) Remove the corner box at right lower side of the indoor unit and remove the removing plate from the corner box. (Figure 3) (2) Insert the removing plate at the back side of the corner box to remove the indoor unit. (3) Remove the hook by pu[...]

  • Page 22

    PHOTOS OPERA TION PROCEDURE 22 3. REMOVING THE INDOOR CONTROLLER BOARD AND INDOOR POWER BOARD (1) Remove the front panel. (Refer to 2) (2) Remove the electrical box cover (screw 4 × 10). (Refer to the Photo 2) INDOOR CONTROLLER BOARD (1) Disconnect the following connectors on the indoor controller board. (connector in front of) CN60, CN5V , CN90, [...]

  • Page 23

    PHOTOS OPERA TION PROCEDURE 23 5. REMOVING THE NOZZLE ASSEMBL Y AND DRAIN HOSE (1) Remove the front panel (Refer to 2). (2) Remove the electrical box cover . (3) Disconnect the connector (CN5V) on the indoor controller board. (4) After unhook the right side of the corner box, press the upper left side and remove the corner box. (5) Remove the nozzl[...]

  • Page 24

    TM Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., L TD. Distributed in Apr . 2009 No. OCH461 PDF 7 Made in Japan New publication, effective Apr . 2009 Specifications subject to change without notice HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAP AN[...]