Mitsubishi city multi PKFY-08NAMU-A Technical & Service Manual Download Page 35

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OC292-33

TROUBLESHOOTING

9-1. How to check
PKFY-08NAMU-A

Room temperature
thermistor(TH21)

Liquid pipe temperature
thermistor(TH22)

Gas pipe temperature
thermistor(TH23)

Vane motor

Fan motor

Linear expansion
valve

Disconnect the connector, then measure the resistance using a tester.
(Surrounding temperature 50˚F~86˚F)

Part Name

Check points

Measure the resistance between the terminals using a tester.(Surrounding temperature 68˚F.)

Disconnect the connector then measure the resistance valve using a tester.
(Coil temperature 68˚F)

(Refer to page OC292-36 for details.)

Normal

Abnormal

White-Black

195

Open or short

Red-Black

Normal

Abnormal

At first, check if the electrical pressure is 12V between the

brown wire(GND) and yellow wire(VCC).

Slowly start running the fan. It is normal if while the fan rotate once,

the electrical pressure change from 0V to12V then go back to 0V.

If the electrical pressure stay at around 0V or 10V, it means the fan
motor has the defects.

200

Normal

White-Red

150

±10%

Abnormal

Open or short

Yellow-Brown

Orange-Red

Blue-Brown

Normal

Red-Pink

400

± 7%

Abnormal

Open or short

Red-Blue

Red-Orange

Red-Yellow

Fuse

293

White

Red

Black

Brown

Gray Yellow

CN34

FAN

Orange

Red

White

Blue

Brown

Yellow

Without disassembling the parts, measure the electrical pressure of the gray wire(Signal line) and

brown wire (GND) while the power is on.

Measure the resistance between the terminals using a tester.(Surrounding temperature 77˚F.)

Normal

4.3k

~9.6k

Abnormal

Open or short

Blue

Yellow

Red

Orange

Pink

Connect pin No.

(Refer to page
OC292-36 for details.)

OC292--2.qxp 02.9.26 4:52 PM Page 33

Summary of Contents for city multi PKFY-08NAMU-A

Page 1: ...Y 08NAMU A PKFY 12NGMU A PKFY 20NFMU A PKFY 32NFMU A CONTENTS 1 PKFY MU A Type OC292 1 2 PLFY NAMU A Type OC290 1 LIST ED C US Ceiling Cassettes Type CITY MULTI Series Models PLFY 12NAMU A PLFY 20NAMU A PLFY 24NAMU A PLFY 32NAMU A PLFY 40NAMU A Connected outdoor unit is PURY 80TMU or PURY 100TMU CITY MULTI Indoor Unit ...

Page 2: ......

Page 3: ...SPECIFICATIONS OC292 10 5 OUTLINES AND DIMENSIONS OC292 17 6 WIRING DIAGRAM OC292 21 7 REFRIGERANT SYSTEM DIAGRAM OC292 24 8 MICROPROCESSOR CONTROL OC292 25 9 TROUBLESHOOTING OC292 33 10 DISASSEMBLY PROCEDURE OC292 42 11 PARTS LIST OC292 51 PKFY 08NAMU A PKFY 12NGMU A PKFY 20NFMU A PKFY 32NFMU A ...

Page 4: ......

Page 5: ...33 32 11 5 8 32 3 32 6 7 32 OFF OFF ON OFF 1 2 1 4 O D 5 8 12NGMU A Lineflow fan 1 4 speeds type 42 40 36 32 13 3 8 39 9 1 4 OFF ON ON OFF OFF OFF 1 2 1 4 O D 13 16 20NFMU A 2 speeds type 45 39 55 1 8 OFF ON OFF ON OFF OFF 32NFMU A 2 speeds type 49 46 66 1 8 OFF OFF OFF OFF ON OFF PKFY 210 200 180 170 190 180 170 160 D R Y W E T 410 370 340 280 370 330 300 250 D R Y W E T 640 490 570 440 D R Y W E...

Page 6: ...x for easier wiring even after installation The front power supply box allows electrical wiring work to be done after the indoor unit has been installed For easier installation all the screws required for securing the indoor unit to the wall are accessible from the front of the unit 2 4 4 way piping provides more flexibility in selecting installation sites All piping including drainage can be conn...

Page 7: ...ns out 2 4 Quiet Operation Airflow passage configuration that assures quiet operation 1 The unit incorporates a randompitch cycling fan By changing fan intervals quiet operation is achieved without reduction in airflow Optimal design of the airflow passage gives a shortened fan diameter and allows a highly compact installation 2 Thanks to a highly practical casing configuration airflow generated b...

Page 8: ...to Angle securing a comfortable air flow 2 4 INSTALLATION FAST AND ENDLESSLY ADAPTABLE 1 Multi directional piping Multi directional drain and refrigerant piping radically improves flexibility in selecting installation layouts PKFY NFMU A models boast refrigerant piping in 4 directions and drain piping 2 directions 2 Back plate installation guide The back plate installation guide gives clear instru...

Page 9: ...Y 12NGMU A Air intake Room air is suctioned in here Removes dust and dirt from the intake air Filter Air intake grilles Air outlet Air outlet Auto vane Air flow can be changed to horizontally by moving the Guide vane to the left or right Guide vane PKFY 20NFMU A PKFY 32NFMU A Air intake grille Air intake Filter Auto vane Air outlet ...

Page 10: ... during operation ON OFF button Only press this button to perform an inspection check or test operation Do not use it for normal operation CHECK TEST RUN button This switch the horizontal fan motion ON and OFF Not available for this model LOUVER button This adjusts the vertical angle of the ventilation AIR DIRECTION button This resets the filter service indication display FILTER button This sets t...

Page 11: ...blow DEFROST display This indicates when the defrost operation is performed CHECK display This indicates when a malfunction has occurred in the unit which should be checked CLOCK display The current time start time and stop time can be displayed in ten second intervals by pressing the time switch button The start time or stop time is always displayed during the timer operation Display In this disp...

Page 12: ...ating Cooling Heating Height Width Depth DRY WET Gas side Liquid side PKFY 08NAMU A 8 000 9 000 0 03 0 03 0 15 0 15 Plastic munsell 2 60Y 8 66 0 69 11 5 8 32 3 32 6 7 32 Cross fin Lineflow fan 1 170 180 200 210 160 170 180 190 0 0 008 Polyethylene sheet PP honey comb 1 2 1 4 PVC pipe with O D 5 8 32 33 35 36 19 Electric characteristic Single phase 208 230V 60Hz Note 1 Rating conditions Cooling Ind...

Page 13: ...ol Out dimensions Heat exchanger Fan Insulator Air filter Pipe dimensions Unit drain pipe size Noise level w 2 Product weight Unit V Hz Btu h Btu h kW kW A A in in in CFM CFM Pa kW in in in dB lbs Cooling Heating Cooling Heating Height Width Depth DRY WET Gas side Liquid side PKFY 12NGMU A Single phase 208 230V 60Hz 12 000 12 500 0 07 0 07 0 34 0 34 Plastic white 0 70Y 8 59 0 97 13 3 8 39 9 1 4 Cr...

Page 14: ...ter Pipe dimensions Unit drain pipe dimension Noise level Low High Product weight Unit V Hz Btu h Btu h kW kW A A in in in CFM CFM Pa kW in in in dB lbs Cooling Heating Cooling Heating Height Width Depth DRY WET Gas side Liquid side PKFY 20NFMU A 20 000 22 500 0 09 0 09 0 44 0 44 55 1 8 490 640 440 570 0 045 39 45 53 PKFY 32NFMU A 32 000 35 500 0 12 0 12 0 58 0 58 66 1 8 780 990 700 890 0 070 46 4...

Page 15: ...ce 30 F 15 8k 50 F 9 6k 70 F 6 0k 80 F 4 8k 90 F 3 9k 100 F 3 2k 250V 6A 4 Pole Output 8W PS4N8 1 2µF 440V MSFBC20A03 DC12V L1 L2 GR 250V 20A M1 M2 250V 10A Liquid pipe thermistor Gas pipe thermistor Fan motor capacitor Linear expansion valve PKFY 08NAMU A Room temperature thermistor Fuse Indoor power board Fan motor with thermal fuse Vane motor with limit switch Power supply terminal block Transm...

Page 16: ...bol TH21 TH22 TH23 FUSE MF C MV LEV TB2 TB5 TB15 Resistance 30 F 15 8kΩ 50 F 9 6kΩ 70 F 6 0kΩ 80 F 4 8kΩ 90 F 3 9kΩ 100 F 3 2kΩ Resistance 30 F 15 8kΩ 50 F 9 6kΩ 70 F 6 0kΩ 80 F 4 8kΩ 90 F 3 9kΩ 100 F 3 2kΩ Resistance 30 F 15 8kΩ 50 F 9 6kΩ 70 F 6 0kΩ 80 F 4 8kΩ 90 F 3 9kΩ 100 F 3 2kΩ 250V 6A PM4N30 KA 208V 230V 60Hz 4 pole Output 30W OPEN 257 9 F 2 0µF 440V MP 35 EA DC12V DC12V Stepping motor dri...

Page 17: ...PKFY 20NFMU A Resistance 30 F 15 8kΩ 50 F 9 6kΩ 70 F 6 0kΩ 80 F 4 8kΩ 90 F 3 9kΩ 100 F 3 2kΩ Resistance 30 F 15 8kΩ 50 F 9 6kΩ 70 F 6 0kΩ 80 F 4 8kΩ 90 F 3 9kΩ 100 F 3 2kΩ Resistance 30 F 15 8kΩ 50 F 9 6kΩ 70 F 6 0kΩ 80 F 4 8kΩ 90 F 3 9kΩ 100 F 3 2kΩ 250V 6A OPEN 266 9 F 2 5 440V MP 35 EA DC12V L1 L2 GR 330V 30A M1 M2 S 250V 20A 1 2 250V 10A Model Parts name PKFY 32NFMU A Inner thermostat DC12V St...

Page 18: ...RESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE PKFY 12NGMU A Hi Med1 Med2 Lo NOTCH 42 40 36 32 SPL dB LINE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz APPROXIMATE THRESHOLD OF HEARING FOR CONT...

Page 19: ...ke Air intake 7 3 32 180 Air outlet Air intake 24 13 16 630 1 2 13 1 2 13 1 25 5 27 3 8 695 11 5 8 295 27 32 21 5 32 3 32 815 3 15 16 100 or more 5 1 8 130 or more W1 5 1 8 130 or more 25 32 20 or more 30 13 16 783 6 7 32 158 2 9 16 2 3 4 65 70 Through hole 3 Sleeves are available on the market 2 9 16 65 Sleeve Wiring entrance holes Terminal block Detailed figure dwg ABC Knock out hole R 5 1 6 R 8...

Page 20: ... Knock out hole for left rear piping Flexible hose total length 31 1 2 800 Right side piping installation Left side piping installation 12 Louvers manual Auto vane Air intake Knock out hole for left piping Refrigerant pipe Drain pipe Wiring hole 1 3 8 35 Less than 5 1 8 130 1 31 32 50 or more 5 29 32 150 or more 7 3 32 180 or more 1 13 16 30 or more 27 9 16 700 6 1 32 153 3 3 8 86 2 1 8 54 1 7 32 ...

Page 21: ...ing 4 7 32 107 7 7 32 183 2 5 32 55 4 23 32 120 1 21 32 42 2 9 32 58 Drain hose 1 25 32 45 1 25 32 45 1 25 32 45 Knock out hole for wiring A B C 1 3 16 30 1 3 16 30 1 17 32 39 B A 2 29 32 74 C 3 27 32 98 1 15 32 37 2 29 32 74 1 15 32 37 2 9 16 65 5 32 4 1 17 32 39 1 9 16 39 3 15 16 100 1 1 4 32 1 15 32 37 3 15 16 100 5 32 4 21 23 32 552 Air outlet 44 3 32 1120 13 3 8 340 7 3 4 197 1 2 13 2 15 32 6...

Page 22: ...age range on left hand side Drainage range on right hand side 1 2 A A C B 3 15 16 100 5 32 4 1 17 32 39 2 29 32 74 1 15 32 37 2 9 16 65 1 15 32 37 1 17 32 39 1 1 4 32 3 27 32 98 5 32 4 2 29 32 74 1 15 32 37 1 17 32 39 3 15 16 100 1 3 16 30 1 3 16 30 Drain hose for left hand side piping 1 21 32 42 2 9 32 58 27 5 16 694 Air outlet 9 7 16 240 1 25 32 45 13 3 8 340 1 2 13 1 25 32 45 2 15 32 62 5 9 1 4...

Page 23: ...using M NET please connect to TB5 Transmission line is non polar In case of connecting MA Remote controller please connect MA remote controller cable in an accessorie 2 CN35P MICON BOARD BLU CN53P MICON BOARD RED BLU RED POWER BOARD POWER BOARD CN53M CN35M CN43 ADDRESS RED RED ADDRESS CN82 SW5 208V 230V 3RD DIGIT 2ND DIGIT 1ST DIGIT CONNECTION NO WHT CENTRALLY CONTROL GRN REMOTE INDICATION RED ADD...

Page 24: ...SW11 SW12 SW14 SWC OPTION SELECTOR CONNECTION No ADDRESS SETTING 1ST DIGIT VOLTAGE SELECTION MODE SELECTION SWITCH CIRCUIT BOARD ADDRESS A B TH23 SYMBOL NAME Mark LED1 LED2 Power supply for MA Remote controller Main power supply Meaning LED on indoor board for service Function Main power supply Indoor unit 208 230V power on lamp is lit Power supply for MA Remote controller on lamp is lit 3 2 1 THE...

Page 25: ... BOARD NAME SYMBOL NAME SW1 SW5 SW11 SW12 SW14 SWC OPTION SELECTOR CONNECTION No ADDRESS SETTING 1ST DIGIT VOLTAGE SELECTION MODE SELECTION SWITCH CIRCUIT BOARD ADDRESS A B TH23 SYMBOL NAME Mark LED1 LED2 Power supply for MA Remote controller Main power supply Meaning LED on indoor board for service Function Main power supply Indoor unit 208 230V power on lamp is lit Power supply for MA Remote con...

Page 26: ...rant flow in heating Strainer 50mesh Strainer 100mesh Strainer 100mesh Heat exchanger Room temparature thermistor TH21 Gas pipe thermistor thermistor TH23 Liquid pipe thermistor TH22 Linear expansion valve Gas pipe Liquid pipe Flare connection Refrigerant flow in cooling Refrigerant flow in heating PKFY 12NGMU A PKFY 20NFMU A PKFY 32NFMU A Gas pipe Liquid pipe PKFY 20NFMU A PKFY 32NFMU A 5 8 3 8 I...

Page 27: ...control Detected condition When the liquid pipe temp TH22 is 36 F or less in 16 minutes from compressors start up anti freezing control starts and the thermo OFF Released condition The timer which prevents reactivating is set for 3 minutes and anti freezing control is cancelled when any one of the following conditions is satisfied 1 Liquid pipe temp TH22 turn 50 F or above 2 The condition of the t...

Page 28: ... equipped with the swing function Horizontal Downward A Downward B Downward C 3 In case of PKFY 08NAMU A and PKFY 12NGMU A Restriction of the downward vane setting When setting the downward vane A B or C in Med1 Med2 or Low of the fan speed notch the vane changes to horizontal position after 1 hour have passed In case of PKFY 20NFMU A and PKFY 32NFMU A Restriction of the downward vane setting When...

Page 29: ...control function Indoor fan operation controlled depends on the compressor conditions Room temperature 3 min passed since starting operation Thermoregulating signal Room temperature T1 Dry thermo ON time min Dry thermo OFF time min Less than 64 F Over 64 F ON OFF T1 82 F 82 F T1 79 F 79 F T1 75 F 75 F T1 Unconditional 9 3 7 3 5 3 3 3 10 3 Dry thermo OFF Note Remote controller setting is not accept...

Page 30: ... Same as the control performed during the COOL operation but with no restriction on the vane s downward blow setting Type Fan speed notches Low Med2 Med1 High Low High 4 speeds type 2 speeds type 8 3 FAN operation How to operate 1 Press POWER ON OFF button 2 Press the operation MODE button to display FAN ...

Page 31: ...2 Fan 1 Fan speed change notch Refer to the model function table A HOT adjuster mode start B 5 min have passed since the condition A or the indoor Condenser Evaporator temp turned 65 F or more C 2 min have passed since the condition A Terminating the hot adjuster mode A C B Extra Low Low Set fan speed by the remote controller Hot adjuster mode 1 1 STAND BY will be displayed during the hot adjuster...

Page 32: ...t equipped with the swing function Horizontal Downward A Downward B Downward C 3 Restriction of vane position 1 The vane is horizontally fixed for the following modes The control by the remote controller is temporally invalidated and control by the unit Thermo OFF Hot adjuster Extra low mode Heat defrost mode 3 Vane control Up down vane change From the preceding page 2 2 Preheating exclusion mode ...

Page 33: ...ration mode Remarks 2 Mode change Same control as cool operation 3 COOL mode Same control as heat operation 4 HEAT mode 8 5 AUTO operation Automatic COOL HEAT change over operation How to operate 1 Press POWER ON OFF button 2 Press the operation MODE button to display AUTO 3 Press the SET TEMP button to set the desired temperature NOTE The set temperature changes 2 F when the or button is pressed ...

Page 34: ...ten seconds after pressing the button the display on the remote controller will turn off The example shows a timer set for operation start at 8 00 and end at 17 00 2 set the mode to continuous as follows 1 Press TIMER button to display D 3 Set the time to start the unit as follows 2 Press CLOCK ON OFF button to display B ON 3 Press button to set the time that you want the unit to start The start t...

Page 35: ...d yellow wire VCC Slowly start running the fan It is normal if while the fan rotate once the electrical pressure change from 0V to12V then go back to 0V If the electrical pressure stay at around 0V or 10V it means the fan motor has the defects 200 Normal 1 5 White Red 150 10 Abnormal Open or short 2 6 Yellow Brown 3 5 Orange Red 4 6 Blue Brown Normal 1 2 Red Pink 400 7 Abnormal Open or short 1 3 R...

Page 36: ...or TH22 Gas pipe thermistor thermistor TH23 Normal 4 3k 9 6k Abnormal Open or short Abnormal Open or short Normal 150 i10 1 5 White Red 2 6 Yellow Brown 3 5 Orange Red 4 6 Blue Brown Normal Connector Abnormal 186 214 Open or short Orange Red White Blue Brown Yellow 3 6 1 5 4 2 M Orange Red White Red Yellow Red Blue Red Orange Red White Blue Yellow 3 5 1 2 4 Measure the resistance between the termi...

Page 37: ...0 1 5 White Red 2 6 Yellow Brown 3 5 Orange Red 4 6 Blue Brown Orange Red White Blue Brown Yellow 3 6 1 5 4 2 M Measure the resistance between the terminals using a tester Surrounding temperature 68 F Fan motor 1 3 3 2 5 1 Red White Black FAN Protector PKFY 20NFMU A 99 5 i10 103 5 i10 PKFY 32NFMU A 62 6 i10 74 0 i10 Abnormal Open or short Red Black White Black Motor terminal or Relay connector Nor...

Page 38: ...00_F 3 2k Thermistor for lower temperature Linear expansion valve Operation summary of the linear expansion valve Linear expansion valve open close through stepping motor after receiving the pulse signal from the indoor controller board Valve position can be changed in proportion to the number of pulse signal Connection between the indoor controller board and the linear expansion valve 1 273 t 32 ...

Page 39: ...osed all the way It is not necessary to exchange the linear expansion valve if the leakage is small and not making any trouble Thermistor Liquid pipe Linear expansion valve Motor will idle and make ticking noise when motor is operated while the linear expansion valve is locked This ticking sound is the sign of the abnormality Check the color of lead wire and missing terminal of the con nector Exch...

Page 40: ...lable Not available Second setting Horizontal angle Effective Not effective 5 degrees 15 degrees Heat pump Cooling only Capacity save Vane Vane horizontal angle Heat 4degrees up Heat pump Not available Not available Available First setting Down B C Not effective Effective 2 degrees 10 degrees 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 SW1 Mode Selection SW2 Capacity code setting 1 4 SW3 Function Se...

Page 41: ... Heat pump Cooling only Louver Vane Vane swing function Vane horizontal angle Heat 4degrees up Heat pump Not available Not available Not available First setting Down B C Not effective Effective 2 degrees 10 degrees 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 SW1 Mode Selection SW2 Capacity code setting 1 6 1 5 SW3 Function Selection SW4 Unit Selection Indoor linear expansion valve opening Thermistor...

Page 42: ...ane horizontal angle Heat 4degrees up Heat pump Not available Not available Not available First setting Down B C Not effective Effective 2 degrees 10 degrees 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 SW1 Mode Selection SW2 Capacity code setting 1 6 1 5 SW3 Function Selection SW4 Unit Selection Indoor linear expansion valve opening Thermistor intake temperature detection position At delivery ON OFF...

Page 43: ... switch Address setting should be done when M NET Remote controller is being used This is the switch to be used when the indoor unit is operated with R2 series outdoor unit as a set If the unit is used at the 230V area set the voltage to 230V If the unit is used at the 208V set the voltage to 208V Remarks Address can be set while the unit is stopped Address board At delivery Address board At deliv...

Page 44: ... removing plate Insert the edge Pull Push Corner hole 1 2 Push Down Be careful not to damage the airflow adjustment plate with the screw driver Figure 1 Figure 2 2 REMOVING THE FRONT PANEL Before removing the front panel leave the open space at upper side of air flow adjustment plate approximately 2 to 3 cm 1 Remove the screw caps then remove the set screws Refer to the photo 1 2 Remove the left s...

Page 45: ...you See the photo 3 Photo 2 Electrical box cover Screw cap Electrical box Photo 3 Indoor micro controller board Indoor power board 4 REMOVING THE ELECTRICAL BOX 1 Remove the front panel Refer to 2 2 Remove the electrical box cover 3 Pull the nozzle assembly toward you as opening the catch of the nozzle assembly 4 Disconnect the indoor outdoor connector 5 Disconnect the following connector on the i...

Page 46: ...ger toward you See the photo 7 8 Remove the line flow fan 7 REMOVING THE VANE MOTOR 1 Remove the front panel 2 Remove the screw of the electrical parts box cover and remove the cover 3 Remove the screw of the vane motor and remove the motor from the shaft 4 Disconnect the vane motor connector CN5V on the indoor controller board 8 REMOVING THE LIQUID PIPE THERMISTOR AND GAS PIPE THERMISTOR 1 Remove...

Page 47: ...3screws 4 After removing the lower side of the front panel a little remove it as pulling toward upper 3 REMOVING THE INDOOR CONTROLLER BOARD 1 Remove the terminal block cover 2 Remove the front panel see the photo 1 3 Remove the electrical parts box 2screws 4 Remove the electrical parts box cover 1screw 5 Disconnect the connector on the indoor controller board and remove the controller board by Pu...

Page 48: ...with set to the pipe 3 Removing the gas pipe thermistor TH23 1Disconnect the connector CN29 black on indoor controller board 2Remove the gas pipe thermistor with set to the pipe Electrical parts box Liquid pipe thermistor Room thermistor Gas pipe thermistor 6 REMOVING THE NOZZLE ASSEMBLE 1 Disconnect the connector CN6V on the indoor controller board 2 Disconnect the lead wire of the vane motor 3 R...

Page 49: ...e fixture fixing bearing w The fan motor is removable first when the fan removing is hard w When resetting the fan to the fan motor Locate and fix the shaft after installing the fan Photo10 Heat exchanger Set screws Fixture fixing bearing 10 REMOVING THE HEAT EXCHANGER 1 Remove the terminal block cover 2 Remove the front panel see the photo 1 3 Remove the electrical parts box see the photo 7 4 Rem...

Page 50: ...cover 3 Disconnect the connectors on the indoor controller board 4 To unhook the catches on the right hand side of the indoor controller board pull the left hand side toward you and lift up the cover to the right Then the indoor controller board can be removed 4 Removing the electrical parts box 1 Remove the right side panel 2 Remove the screw of the electrical parts box cover and controller cover...

Page 51: ...el from the catch on the unit 2 Slide the left side panel to the left to remove the panel Note Fix the unit to the metal fixture securely 3 Remove the air filters 4 Hold and press the center cover to remove 5 Remove the screws of the grilles 6 Pull the lower side of the grille toward you and slide the upper to the right to remove the grilles 7 Removing the drain pan 1 Remove the left and right sid...

Page 52: ...the left and right motor supports and remove the motor supports and the fan motor See Photo 9 8 Remove the screw of the center support and remove the support See Photo 10 9 Remove the 2 screws on the left and right sides of the heat exchanger and pull the bearing support toward you See Photo 11 10 Pull the left hand side of the heat exchanger toward you and remove the lineflow fan Photo 10 Screw C...

Page 53: ...E SCREW CAP GRILLE CATCH CORNER BOX BACK PLATE No Parts No Parts Name Specifications PKFY 08NAMU A Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price 1 1 1 1 1 1 1 1 3PCS SET R01 22A 635 R01 22A 651 R01 22A 500 R01 22A 691 R01 22A 096 R01 22A 054 T7W A00 658 R01 22A 808 ...

Page 54: ...CONTROLLER SET LEFT RIGHT 250V 6A 3P L1 L2 GR 2P M1 M2 GAS LIQUID PS4N8 KA PAR 20MAU No Parts No Parts Name Specifications PKFY 08NAMU A Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price MV FUSE TH21 A B TB2 TB5 P B M B TH23 TH22 MF R B 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 T7W B00 675 R01 22A 530 R01 22A 223 R01 22A 002 R01 22A 527 R01 22A 126 R01 07Y 0...

Page 55: ...MU A 1 2 HEAT EXCHANGER LINEAR EXPANSION VALVE With connection pipe No Parts No Parts Name Specifications PKFY 08NAMU A Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price T7W E84 480 R01 E27 401 1 1 LEV 1 2 ...

Page 56: ...wing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Price R01 07Y 651 R01 07Y 092 R01 07Y 691 R01 A16 500 R01 07Y 002 R01 07Y 096 R01 09Y 658 R01 07Y 635 R01 07Y 808 R01 07Y 623 R01 07Y 658 FRONT PANEL VANE SLEEVE FRONT GRILLE AIR FILTER AUTO VANE SCREW CAP CORNER COVER BOX ASSEMBLY BACK PLATE UNDER COVER CORNER COVER 3 6 11 4 10 7 9 8 1 5 2 ...

Page 57: ...T7W E11 716 T7W E17 716 R01 556 246 T7W E11 255 R01 E02 313 T7W E28 310 T7W 410 239 R01 E26 202 R01 E28 202 T7W E25 202 R01 07Y 130 R01 E27 401 T7W E00 294 R01 85Y 304 FAN MOTOR HEAT EXCHANGER LINE FLOW FAN SLEEVE BEARING BEARING MOUNT BEARING SUPPORT FAN GUARD DRAIN PLUG NOZZLE ASSY ARM GUIDE VANE GUIDE VANE VANE MOTOR DRAIN HOSE MOTOR COVER RUBBER MOUNT TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLO...

Page 58: ...HANGER HEAT EXCHANGER DRAIN PAN DRAIN PAN AUTO VANE AUTO VANE JOINT SHAFT 1 1 1 1 1 2 1 Remarks Drawing No R01 Z61 102 R01 12G 103 R01 13G 114 R01 16G 114 T7W E97 480 T7W E98 480 T7W E13 529 T7W E14 529 R01 12G 002 R01 16G 002 R01 12G 063 1 1 1 1 1 2 1 PKFY 20NFMU A 32NFMU A 1 2 3 29 28 4 5 7 6 8 10 13 14 17 18 20 21 22 24 23 27 12 15 26 9 6 19 25 ELECTRICAL PARTS PKFY 20NFMU A PKFY 32NFMU A 30 16...

Page 59: ...16 T7W E17 716 R01 556 246 T7W E03 255 T7W E28 310 T7W 410 239 R01 E02 313 T7W B00 762 T7W B01 762 R01 13G 105 R01 16G 105 R01 E27 401 T7W E09 401 R01 13G 115 R01 16G 115 R01 005 103 R01 KV5 102 T7W B02 675 T7W B03 675 CENTER COVER DRAIN HOSE VANE MOTOR DRAIN SOCKET GAS PIPE THERMISTOR ROOM TEMPERATURE THERMISTOR LIQUID PIPE THERMISTOR ADDRESS BOARD ADDRESS CABLE TERMINAL BLOCK TERMINAL BLOCK TERM...

Page 60: ...1 1 1 1 1 1 4 2 1 1 1 Remarks Drawing No PKFY 20NFMU A 32NFMU A R01 12G 662 R01 E01 812 R01 E00 812 R01 E00 811 R01 E01 811 R01 A17 500 R01 12G 691 R01 16G 692 R01 12G 661 R01 12G 808 R01 16G 808 R01 E01 641 R01 E00 641 LEFT SIDE PANEL UNDER PLATE UNDER PLATE NOSE NOSE AIR FILTER INTAKE GRILLE INTAKE GRILLE RIGHT SIDE PANEL BACK PLATE BACK PLATE TOP PLATE TOP PLATE 8 9 1 3 4 5 7 6 5 2 ...

Page 61: ...OC290 9 5 OUTLINES AND DIMENSIONS OC290 12 6 WIRING DIAGRAM OC290 13 7 REFRIGERANT SYSTEM DIAGRAM OC290 14 8 MICROPROCESSOR CONTROL OC290 15 9 TROUBLE SHOOTING OC290 23 10 DISASSEMBLY PROCEDURE OC290 28 11 PARTS LIST OC290 31 12 OPTIONAL PARTS OC290 34 PLFY 12NAMU A PLFY 20NAMU A PLFY 24NAMU A PLFY 32NAMU A PLFY 40NAMU A ...

Page 62: ...unit stops operating and the set temperature indicator changes to the self diagnostic indicator indicating the location of the fault If the check switch is pressed twice the unit stops operating and the check mode is initiated The cause of the most recent problem stored in the memory is displayed on the LCD This is extremely useful for maintenance purposes 5 Useful Memory Feature for Storing Instr...

Page 63: ...easy servicing 7 NITROGEN GAS IS CHARGED TO INDOOR UNIT Indoor unit and refrigerant pipes are charged with nitrogen gas N2 instead of R22 before shipment from the factory 4 DRAIN PUMP FOR EASY PIPE CONNECTION DRAIN LIFT UP MECHANISM This mechanism with its capacity to raise drain water 33 7 16 inch above the ceiling line is convenient for removing water and avoiding piping contact with beams etc 5...

Page 64: ...etween continuous operation and the timer operation TIMER button This switches between the operation and stop modes each time it is pressed The lamp on this button lights during operation ON OFF button Only press this button to perform an inspection check or test operation Do not use it for normal operation CHECK TEST RUN button This switch the horizontal fan motion ON and OFF Not available for th...

Page 65: ...blow DEFROST display This indicates when the defrost operation is performed CHECK display This indicates when a malfunction has occurred in the unit which should be checked CLOCK display The current time start time and stop time can be displayed in ten second intervals by pressing the time switch button The start time or stop time is always displayed during the timer operation Display In this disp...

Page 66: ...ight Width Depth Electric characteristic Input Cooling Heating Cooling Heating Current PLFY 12NAMU A PLFY 20NAMU A PLFY 24NAMU A PLFY 32NAMU A PLFY 40NAMU A 12 000 13 000 0 14 0 14 0 68 0 68 390 420 460 490 350 380 410 440 1 2 1 4 24 27 28 30 49 11 20 000 22 500 0 14 0 14 0 68 0 68 10 3 16 1 3 16 490 530 570 640 470 500 530 600 0 070 27 28 31 33 32 000 36 000 0 27 0 27 1 30 1 30 710 810 920 990 67...

Page 67: ...RE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz PLFY 20NAMU A Hi Med1 Med2 Lo NOTCH 33 31 28 27 SPL dB LINE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz PLFY 24NAMU A Hi Med1 Med2 Lo NOTCH 34 33 30 2...

Page 68: ...731 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz PLFY 40NAMU A Hi Med1 Med2 Lo NOTCH 44 43 40 37 SPL dB LINE ...

Page 69: ...e OUTPUT 110W D176P110MS Inner thermostat OPEN 266 F i 9_F 6 pole OUTPUT 70W D17D6P70MS MSBPC20M13 DC12V 300 phase PLD 12220ME 2 INPUT 12 10 8W 24R Hr Thermistor resistance 30_F 6 3k 50_F 3 9k 70_F 2 5k 80_F 2 0k 90_F 1 6k 100_F 1 3k DC12V Stepping motor drive port dimension 3 2 0 2000pulse EDM 40YHME DC12V Stepping motor drive port dimension 5 2 0 2000pulse EDM 80YHME 3 0 440V 7 0 440V 4 4 WAY AI...

Page 70: ... air intake hole Fresh air intake hole diagram Unit inch 3 1 8 Burring hole 4 15 16 Burring hole pitch 3 15 16 Cut out hole Refrigerant pipe Drain pipe Ceiling surface 120_ 1 2 0 _ w6 1 4 4 3 Interlocking operation method with duct fan Booster fan Whenever the indoor unit is operating the duct fun also operates 1 Connect the optional multiple remote controller adapter PAC SA88HA E to the connector...

Page 71: ...ion casement High efficiency filter Taking air into the unit Multifunction casement Standard filter Multifunction casement High efficiency filter Taking air into the unit 4 4 Fresh air intake amount static pressure characteristics Q 0 B A C 1 Curve in the left graphs Duct characteristics at site Q A E C 2 Q Qa A D 3 Q Planned amount of fresh air intake A Static pressure loss of fresh air intake du...

Page 72: ...ce Drain pipe O D 1 1 4 32 connection VP 25 Suspension bolt W3 8 M10 Drain hole Vane motor M M M M Air intake hole Air outlet hole Air outlet hole 6 1 4 159 25 32 1 25 32 20 45 25 32 1 25 32 20 45 6 1 4 159 1 26 23 13 16 605 33 27 32 35 13 16 860 910 33 1 16 840 D C 3 27 32 98 7 9 16 192 2 Unit inch mm 1 6 3 32 155 6 9 16 167 3 15 16 100 5 1 8 130 7 0 3 17 32 90 3 15 16 100 3 15 16 100 3 17 32 90 ...

Page 73: ...for service Function DP DRAIN WATER LIFTING UP MACHINE DS DRAIN SENSER H2 DEW PREVENTION HEATER FAN MOTOR DRAIN PUMP X1 AUX RELAY HUMIDIFIER CN25 DAMPER CN27 NAME OPTION SELECTOR SWC DISCHARGE OUTLET NUMBER SELECTOR SWB SWITCH CAPACITY CODE MODE SELECTION MODEL SELECTION VARISTOR INDOOR POWER BOARD P B ZNR X4 SW4 SW3 SW2 I B CN32 CN41 CN51 CN52 F C FUSE FUSE 6A 250V FAN PHASE CONTROL REMOTE INDICA...

Page 74: ...21 Gas pipe thermistor TH23 Liquid pipe thermistor TH22 Linear expansion valve Gas pipe Liquid pipe Flare connection Refrigerant flow in cooling Refrigerant flow in heating PLFY 12NAMU A PLFY 32NAMU A PLFY 20NAMU A PLFY 40NAMU A PLFY 24NAMU A Gas pipe Liquid pipe PLFY 12NAMU A 1 2 1 4 PLFY 20 24 32NAMU A 5 8 3 8 PLFY 40NAMU A 3 4 3 8 Item Service Ref ...

Page 75: ...1 2 Anti freezing control Detected condition When the liquid pipe temp TH22 is 36 F or less in 16 minutes from compressors start up anti freezing control starts and the thermo OFF Released condition The timer which prevents reactivating is set for 3 minutes and anti freezing control is cancelled when any one of the following conditions is satisfied 1 Liquid pipe temp TH22 turn 50 F or above 2 The ...

Page 76: ...sensor temperature rise t Temperature of drain sensor before current is applied T0 Temperature of drain sensor after current is applied T1 t T1 T0 1 Initial setting Start at COOL mode and horizontal vane 2 Vane position Horizontal Downward A Downward B Downward C Swing 3 Restriction of the downward vane setting When setting the downward vane A B or C in Med1 Med2 or Low of the fan speed notch the ...

Page 77: ...n passed since starting operation Thermoregulating signal Room temperature T1 Dry thermo ON time min Dry thermo OFF time min Less than 64 F Over 64 F ON OFF T1 82 F 82 F T1 79 F 79 F T1 75 F 75 F T1 Unconditional 9 3 7 3 5 3 3 3 10 3 Dry thermo OFF 2 Fan Note Remote controller setting is not acceptable Dry thermo Fan speed notch ON OFF Low Stop 4 Vane up down vane change Same control as COOL opera...

Page 78: ...2 or 3 is still being met after the drain pump has been turned ON for 6 minutes the drain pump is kept ON for a further 6 minutes 2 2 Liquid level detection method The liquid level is detected by determining whether or not the drain sensor is submerged based on the amount the temperature rises after self heating the sensor This process is performed if any of the following conditions is met 1 Drain...

Page 79: ...ndition A or the indoor liquid pipe temperature turned 65 F or more C 2 min have passed since the condition A Terminating the hot adjuster mode A C B Extra Low Low Set fan speed by the remote controller Hot adjuster mode 1 2 2 Preheating exclusion mode When the condition changes the auxiliary heater ON to OFF thermoregulating or operation stop etc the indoor fan operates in Low mode for 1 minute 1...

Page 80: ...operates for 3 minutes 1 Initial setting OFF HEAT last setting When changing the mode from exception of HEAT to HEAT operation Downward C 2 Vane position Horizontal Downward A Downward B Downward C Swing 3 Restriction of vane position 1 The vane is horizontally fixed for the following modes The control by the remote controller is temporally invalidated and control by the unit Thermo OFF Hot adjust...

Page 81: ...ain sensor input is at the short or open level If condition 2 or 3 is still being met after the drain pump has been turned ON for 6 minutes the drain pump is kept ON for a further 6 minutes 1 2 Liquid level detection method The liquid level is detected by determining whether or not the drain sensor is submerged based on the amount the temperature rises after self heating the sensor This process is...

Page 82: ...ten seconds after pressing the button the display on the remote controller will turn off The example shows a timer set for operation start at 8 00 and end at 17 00 2 set the mode to continuous as follows 1 Press TIMER button to display D 3 Set the time to start the unit as follows 2 Press CLOCK ON OFF button to display B ON 3 Press button to set the time that you want the unit to start The start t...

Page 83: ...age for a detail Refer to the next page for a detail Room temperature thermistor TH21 Liquid pipe thermistor TH22 Gas pipe thermistor TH23 1 2 Yellow Yellow 1 2 3 Normal 4 3k 9 6k Abnormal Open or short Abnormal Open or short Normal 0 6k 6 0k Abnormal Open or short Normal 150 i10 1 5 White Red 2 6 Yellow Brown 3 5 Orange Red 4 6 Blue Brown Normal Connector Abnormal 300 Open or short Normal Abnorma...

Page 84: ...F 1 3k Thermistor for lower temperature Linear expansion valve Operation summary of the linear expansion valve Linear expansion valve open close through stepping motor after receiving the pulse signal from the indoor controller board Valve position can be changed in proportion to the number of pulse signal Connection between the indoor controller board and the linear expansion valve 1 273 t 32 1 8...

Page 85: ...osed all the way It is not necessary to exchange the linear expansion valve if the leakage is small and not making any trouble Thermistor Liquid pipe Linear expansion valve Motor will idle and make ticking noise when motor is operated while the linear expansion valve is locked This ticking sound is the sign of the abnormality Check the color of lead wire and missing terminal of the con nector Exch...

Page 86: ...oling limit angle setting w4 Heat 4degrees up Superheat setting temperature w6 Sub cool setting temperature Heat pump Not available Not available Not available First setting Down B C Not effective Effective 2degrees 10degrees 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 SW1 Mode Selection SW2 Capacity code setting 1 6 1 5 SW3 Function Selection SW4 Unit Selection Indoor linear expansion valve opening...

Page 87: ...ements multi function casement to the unit be sure to attach it to the option side in order to prevent the airflow reducing This is the switch to be used when the indoor unit is operated with R2 series outdoor unit as a set If the unit is used at the 230V area set the voltage to 230V If the unit is used at the 208V set the voltage to 208V Remarks At delivery Address board At delivery Address board...

Page 88: ...s from the electrical box loosen another 2 screws to remove the box Electrical parts in the electrical box Indoor controller board power supply board Terminal block Power supply Terminal block Transmission Terminal block MA remote controller Capacitor Address board PLFY 20NAMU A Be careful on removing heavy parts Photo 2 Figure 1 Air intake grille Grille Nut Air intake grille knob 2 Removing the r...

Page 89: ...he panel a little to remove the screws Slide the panel so that the screw comes to a large diameter of the oval hole which has two different diameters Photo 6 Photo 5 Photo 4 4 Remove the fan motor 1 Remove the bell mouth See photo 1 2 Remove the electrical box See photo 2 3 Remove the turbo fan nut washer and radiation cap P100 P125 4 Pull out the turbo fan 5 Disconnect the connector of the fan mo...

Page 90: ...pport 9 Remove the 2 screws of the coil 10 Pull out the heat exchanger 8 Removing the drain pump and drain sensor 1 Remove the panel See photo 5 2 Remove the bell mouth See photo 1 3 Remove the electrical box See photo 2 4 Remove the drain pan See photo 6 5 Remove the 3 screws of the drain pump 6 Cut the drain hose band pull out the drain hose from the drain pump 7 Pull out the drain pump 8 Remove...

Page 91: ...cification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PLFY 12 20 24 32 40 NAMU A T7W E12 003 T7W E05 002 T7W E01 638 R01 E00 638 R01 E00 500 R01 E00 691 R01 E00 223 R01 E00 063 R01 E00 040 R01 E01 040 T7W E00 673 This REMOTE CONTROLLER is made by AIR CONDITIONING REFRIGERATION SYSTEMS WORKS MITSUBISHI ELECTRIC CORPORATION 1 2 3 4 5 6 7 8 9 10 12 PANEL PAR...

Page 92: ...CAP FAN MOTOR FAN MOTOR MOTOR MOUNT No Part No Part Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PLFY NAMU A 12 20 1 1 1 1 1 1 1 4 24 1 1 1 1 1 1 1 1 4 32 1 1 1 1 1 1 1 1 4 40 R01 E10 114 R01 E11 114 R01 08K 097 T7W E92 480 T7W E93 480 T7W E94 480 T7W E95 480 T7W E96 480 T7W E11 401 R01 E32 401 T7W E06 202 R01 E00 202 R01 E00 122 T7W E12 ...

Page 93: ...MINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK CAPACITOR CAPACITOR DRAIN PLUG DRAIN PLUG LEAD ASSY F M 250V 6A 2P 1 2 3P M1 M2 S 3P L1 L2 GR 3 0 440V 7 0 440V No Part No Part Name Specification Q ty set Price Unit Amount Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PLFY NAMU A 12 20 24 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 32 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 40 T7W E09 529 T7W E06 52...

Page 94: ...NAL PARTS 12 1 Multi function casement Part No PAC SG03TM E 12 2 Air outlet shutter plate 20 sets Part No PAC SG06SP E 12 3 High efficiency filter PAC SG03TM E is required in using this optional part Part No PAC SG01KF ...

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Page 97: ...3400 Lawrenceville Suwanee Road Suwanee Georgia 30024 Toll Free 800 433 4822 Toll Free Fax 800 889 9904 www mrslim com Specifications are subject to change without notice ...

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Mitsubishi city multi PKFY-08NAMU-A, Technical & Service Manual

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