Mitsubishi Electric CITY MULTI PEFY-P06NMAU-E Technical & Service Manual Download Page 16

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[

Refrigerant System Diagram ]

- 11 -

HWE09040

Refrigerant System Diagram

[1] Refrigerant system diagram

(A)

Gas pipe thermistor TH23

(B)

Gas pipe

(C)

Liquid pipe

(D)

Brazed connections

(E)

Strainer (#100 mesh)

(F)

Linear expansion valve

(G)

Liquid pipe thermistor TH22

(H)

Heat exchanger

(I)

Room temperature thermistor TH21

(H)

(I)

(F)

(E)

(C)

(G)

(A)

(D)

(B)

Capacity

PEFY-

P06, 08, 12, 15NMAU-E

PEFY-

P18NMAU-E

PEFY-

P24, 27, 30NMAU-E

PEFY-

P36, 48, 54NMAU-E

Gas pipe

ø12.7 [1/2]

R410A: ø12.7 [1/2]

R22: ø15.88 [5/8]

ø15.88 [5/8]

R410A: ø15.88 [5/8]

R22: ø19.02 [3/4]

Liquid pipe

ø6.35 [1/4]

R410A: ø6.35 [1/4]

R22: ø9.52 [3/8]

ø9.52 [3/8]

Summary of Contents for CITY MULTI PEFY-P06NMAU-E

Page 1: ...HNICAL SERVICE MANUAL Models PEFY P06NMAU E PEFY P27NMAU E PEFY P08NMAU E PEFY P30NMAU E PEFY P12NMAU E PEFY P36NMAU E PEFY P15NMAU E PEFY P48NMAU E PEFY P18NMAU E PEFY P54NMAU E PEFY P24NMAU E For use with R410A R22 2009 ...

Page 2: ...unit on a surface that can withstand its weight Unit installed on an unstable surface may fall and cause in jury Only use specified cables Securely connect each cable so that the terminals do not carry the weight of the cable Improperly connected cables may produce heat and start a fire Take appropriate safety measures against wind gusts and earthquakes to prevent the unit from toppling over Impro...

Page 3: ...ean and free of such contaminants as sulfur oxides dust dirt shaving particles oil and moisture Contaminants in the refrigerant piping may cause the refrig erator oil to deteriorate Store the piping materials indoors and keep both ends of the pipes sealed until immediately before brazing Keep el bows and other joints wrapped in plastic Infiltration of dust dirt or water into the refrigerant system...

Page 4: ... Cool operation 12 2 Dry operation 13 3 Fan operation 14 4 Heat operation 15 5 Auto operation Automatic cool heat change over operation 16 6 When unit is stopped control mode 17 7 Heater control 17 VIII Troubleshooting 1 Troubleshooting 21 1 Check methods 21 2 DC fan motor fan motor indoor control board 25 3 Address switch setting 26 4 Voltage test points on the control board 27 5 Dipswitch settin...

Page 5: ...HWE09040 GB ...

Page 6: ...U E 8000 9000 2 3 2 6 PEFY P12NMAU E 12000 13500 3 5 4 0 PEFY P15NMAU E 15000 17000 4 4 5 0 PEFY P18NMAU E 18000 20000 5 3 5 9 PEFY P24NMAU E 24000 27000 7 0 7 9 PEFY P27NMAU E 27000 30000 7 9 8 8 PEFY P30NMAU E 30000 34000 8 8 10 0 PEFY P36NMAU E 36000 40000 10 6 11 7 PEFY P48NMAU E 48000 54000 14 1 15 8 PEFY P54NMAU E 54000 60000 15 8 17 6 ...

Page 7: ...right hand section of the remote controller must be free from obstructions to ensure accurate mea surement of room temperature 1 In case of rear inlet 2 In case of bottom inlet 1 Set Temperature Button 7 Vane Control Button 2 Timer Menu Button 8 Ventilation Button Monitor Set Button Operation Button 3 Mode Button 9 Check Clear Button Back Button 10 Test Run Button 4 Timer On Off Button 11 Filter B...

Page 8: ...r swing B Centralized control indicator J Ventilation C Timer OFF indicator K Filter sign D Timer mode indicator L Sensor position E Operation mode display COOL DRY AUTO FAN HEAT M Room temperature F Function mode indicator N Vane setting G Preset temperature O Fan speed H Power indicator P Operation lamp ...

Page 9: ...bric Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R410A R22 CITY MULTI Diameter of Liquid R410A in mm 1 4 6 35 Brazed 1 4 6 35 Brazed 1 4 6 35 Brazed 1 4 6 35 Brazed refrigerant R22 1 4 6 35 Brazed 1 4 6 35 Brazed 1 4 6 35 Brazed 1 4 6 35 Brazed pipe Gas R410A in mm 1 2 12 7 Brazed 1 2 12 7 Brazed 1 2 12 7 Brazed 1 2 12 7 Brazed O D R22 1 2 12 7 Brazed 1 2 12 7 Br...

Page 10: ... Fuse Refrigerant control device LEV Connectable outdoor unit R410A R22 CITY MULTI Diameter of Liquid R410A in mm 1 4 6 35 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed refrigerant R22 3 8 9 52 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed pipe Gas R410A in mm 1 2 12 7 Brazed 5 8 15 88 Brazed 5 8 15 88 Brazed 5 8 15 88 Brazed O D R22 5 8 15 88 Brazed 5 8 15 88 Brazed 5 8 15 88 Br...

Page 11: ...able outdoor unit R410A R22 CITY MULTI Diameter of Liquid R410A in mm 3 8 9 52 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed refrigerant R22 3 8 9 52 Brazed 3 8 9 52 Brazed 3 8 9 52 Brazed pipe Gas R410A in mm 5 8 15 88 Brazed 5 8 15 88 Brazed 5 8 15 88 Brazed O D R22 3 4 19 05 Brazed 3 4 19 05 Brazed 3 4 19 05 Brazed Diameter of drain pipe in mm O D 1 1 4 32 Drawing External KB94R527 Wiring KB94R531 Ref...

Page 12: ...k 20 C 6 3k 25 C 5 4k 30 C 4 3k 40 C 3 0k Gas pipe thermistor TH23 Resistance 0 C 15k 10 C 9 6k 20 C 6 3k 25 C 5 4k 30 C 4 3k 40 C 3 0k Fuse FUSE 250V 6 3A Fan motor 8 pole Output 85W SIC 70CW D885 2 8 pole Output 121W SIC 70CW D8121 1 Linear expansion valve LEV 12VDC Stepping motor drive port diameter ø3 2 0 2000 pulse Power supply terminal block TB2 L1 L2 G 250V 20A Transmission terminal block T...

Page 13: ... 16 122 4 13 16 D Duct 20 13 16 100 3 15 16 X E 1 F 30 1 3 16 100 3 15 16 217 8 9 16 41 1 5 8 100 3 15 16 356 1 16 67 136 732 28 7 8 700 27 9 16 32 1 5 16 238 9 3 8 10 7 16 23 15 16 178 7 1 16 643 25 3 8 C B Suspension bolt pitch A 10 7 16 57 2 1 4 58 2 5 16 15 5 8 Note 5 Gas pipe 1 Liquid pipe 2 1 2 780 10 4 10 300 150 260 44 800 10 12 1280 330 4 49 54 320 5 990 M L K J N P 1200 1500 H 1000 54 17...

Page 14: ...Fan motor G U Red CN20 CN4F CN44 CN60 CN32 CN51 CN41 CNXB2 CNXB1 CNXC1 CNXA1 CNMF CND DSA ACL FO1 ZNRO1 ZNRO2 CNP CNXC2 CNXA2 CN2M CN2A CN90 CN105 LED1 LED2 CN3A CN27 SWE CN52 SW1 SWA SW4 SW11 SW12 SW14 SWC SW5 Red Green Blue FUSE 16A BREAKER 16A PULL BOX TO NEXT INDOOR UNIT POWER SUPPLY AC208 230V 60Hz S SHIELD DC280 340V Rectifier circuit M2 TB15 M1 TB5 TB2 L2 L1 ON OFF X10 X01 2 1 SW3 t t t SW2...

Page 15: ...ctor emergency opera tion F01 Fuse AC 250V 6 3A CN105 Connector IT terminal SW11 I B Switch 1s digit address set ZNR01 02 Varistor CN2A Connector 0 10V Analog in put SW12 I B Switch 10ths digit address set DSA Arrester FS Float switch SW14 I B Switch BRANCH No X01 Aux relay TH21 Thermistor inlet air temp de tection SWA I B Switch for static pressure se lection X10 Aux relay TH22 Thermistor piping ...

Page 16: ...100 mesh F Linear expansion valve G Liquid pipe thermistor TH22 H Heat exchanger I Room temperature thermistor TH21 H I F E E C G A D B Capacity PEFY P06 08 12 15NMAU E PEFY P18NMAU E PEFY P24 27 30NMAU E PEFY P36 48 54NMAU E Gas pipe ø12 7 1 2 R410A ø12 7 1 2 R22 ø15 88 5 8 ø15 88 5 8 R410A ø15 88 5 8 R22 ø19 02 3 4 Liquid pipe ø6 35 1 4 R410A ø6 35 1 4 R22 ø9 52 3 8 ø9 52 3 8 ø9 52 3 8 ...

Page 17: ...s Auto When Auto is set fan speed is changed depending on the value of Room temperature Desired temperature 3 Drain pump 1 Drain pump control Always drain pump ON during the COOL and DRY mode operation Regardless of the thermo ON OFF When the operation mode has changed from the COOL or DRY to the others including Stop OFF the control after the drain pump ON for 3 minutes 2 Float switch control Flo...

Page 18: ...rature button to set the desired tempera ture The set temperature changes 2 F when the Set Temperature button is pressed one time Dry 67 to 87 F Room temperature 3 min passed since starting operation Dry thermo ON time min Dry thermo OFF time min Thermo regulating signal Room temperature T1 Over 64 F ON T1 83 F 9 3 83 F T1 79 F 7 3 79 F T1 75 F 5 3 75 F T1 3 3 OFF Unconditional 3 10 Less than 64 F...

Page 19: ...in the water 2 Float switch control Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON OFF In the water Detected that the float switch is ON for 15 seconds In the air Detected that the float switch is OFF for 15 seconds How to operate 1 Press POWER ON OFF button 2 Press the operation Mode button to display FAN Type Fan speed notch 3 speeds A...

Page 20: ... A or the indoor liquid pipe temperature turned 95 F or more C 2 minutes have passed since the condition A Terminating the hot adjust mode 1 STAND BY will be displayed during the hot adjust mode 3 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 How to operate 1 Press POWER ON...

Page 21: ...is OFF for 15 seconds 5 Auto operation Automatic cool heat change over operation 1 Initial value of operation mode 1 HEAT mode for room temperature Desired temperature 2 COOL mode for room temperature Desired temperature 2 Mode change 1 HEAT mode COOL mode Room temperature Desired temperature 3 F or 3 min has passed 2 COOL mode HEAT mode Room temperature Desired temperature 3 F or 3 min has passed...

Page 22: ... in the table below and set the DIP S W on the outdoor and indoor units as shown in Table 1 See section 3 Installation for details The table below shows Heater Control patterns A and B ON OFF 15sec 15sec 15sec 1min 30sec 1min 30sec Float SW In the water In the air In the water Error postponement Drain pump abnormal Table 2 Outdoor unit setting Condition of outdoor unit Duct unit PE PD PF NR NL Î P...

Page 23: ...CN22 for FAN control YU25 DIP S W3 4 Indoor unit Fan in defrost 1 Disabled OFF Stop Heater OFF 2 ON L LL Set 1 Heater ON 1 depend on SW1 7 1 8 3 Enabled OFF Stop Heater OFF 4 ON Stop Heater ON SW3 1 SW1 7 SW1 8 Fan speed 1 1 The fan operates at the same speed settings as shown in this table during the Heating Thermo OFF mode OFF OFF OFF Very low OFF ON OFF Low OFF OFF ON Remote controller setting ...

Page 24: ...onnection to the indoor unit Use the cables that fit the connectors on the indoor unit control board The items listed in this parts list cannot be used with the following models PMFY BM PMFY AM 1 External output cable with a yellow connector This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater Connect the cable to CN24 on the indoor u...

Page 25: ...indoor unit shorter than 10 meters 32ft Longer than 10 meters 32ft could cause improper operation Use a transit relay when extending wiring such as remote wiring CN24 CN22 X X Remote control board Relay circuit Adapter Indoor unit control board Outdoor unit control board r e t a e H c i r t c e l E e c r u o s r e w o p Red 1 White 2 PUHY PURY P TGMU type Dip switch SW5 2 ON PUHY PURY P YHMU type ...

Page 26: ...e between terminals with a tester Refer to the next page for details Normal Abnormal 4 3k 9 6k Open or short Refer to the thermistor characteristic graph below Low temperature thermistor Room temperature thermistor TH21 Liquid pipe thermistor TH22 Gas pipe thermistor TH23 Drain sensor DS Thermistor R0 15 k 3 Multiplier of B 3480 k 2 0 C 32 F 15k 10 C 50 F 9 6k 20 C 68 F 6 3k 25 C 77 F 5 2k 30 C 86...

Page 27: ...hanges in the following order When the valve closes 1 2 3 4 1 When the valve opens 4 3 2 1 4 When the valve position remains the same all output signals will be OFF If any output signal is missing or if the signal remains ON the motor vibrates and makes clicking noise A Brown F White B Red G Control board C Blue H Connection CN60 D Orange I Drive circuit E Yellow J Linear expansion valve Phase num...

Page 28: ...ria Remedy Circuit failure on the microcomputer Disconnect the connectors on the control board and connect LEDs to test the cir cuit as shown below Pulse signals are output for 10 seconds when the main power is turned on If there are LEDs that do not light up at all or remain lit after the pulses are turned off there is a problem with the driving circuit Replace the in door control board if drivin...

Page 29: ...22 Normally the LEV is fully closed while the unit is in the FAN mode If the valve is leaky liquid pipe thermistor reading will be lower than normal If it is significantly lower than the inlet temperature on the remote controller valve closure failure is suspected If the amount of leakage is insignificant replacement of LEV is unnec essary unless it is causing a problem Misconnections of connector...

Page 30: ...o make a full rotation or more and measure the voltage at the test point VFG same with the voltage between fan connector 7 and 4 Is the fan motor connector CNMF fully inserted Is the voltage within the normal range Replace the motor Are 0VDC and 15VDC displayed alternately Check the power supply Measure the voltage at the indoor control board 294 340VDC same with the voltage between fan connector ...

Page 31: ...ller is used On site address setting is required for the indoor units to run 2 Address settings vary in different systems Refer to the section on address setting in the outdoor unit installation manual 3 Address is set with a combination of SW12 10 s digit and SW11 1 s digit To set the address to 3 set SW12 to 0 and SW11 to 3 To set the address to 25 set SW 12 to 2 and SW 11 to 5 A Indoor unit con...

Page 32: ...id gas tempera ture CN4F Float thermistor CN22 For fan control CN24 For heater control CN20 Thermistor Inlet temperature CNMF Fan motor output 1 4 310 340 VDC 5 4 15 VDC 6 4 0 6 5 VDC 7 4 Stop 0 or 15 VDC Run 7 5 VDC 0 15 pulse CNP Drain up mechanism output 200VAC 1 VFG Voltage on the side of PC51 and C25 Same with the voltage between 7 and 4 of CNMF VCC Voltage between the C25 pins 15 VDC Same wi...

Page 33: ... 100 hr 4 Outdoor air intake Enabled Disabled 5 Remote display Thermo ON signal Fan output 6 Humidifier operation During heating mode During heating operation 7 Fan speed Low Very low 8 Fan speed at heating Thermo OFF Preset fan speed Follows the setting of SW1 7 9 Auto restart after power failure Enabled Disabled 10 Power start stop Enabled Disabled Factory setting Switch position Function Switch...

Page 34: ...nd SW3 will become effective when the unit comes to a stop remote controller off There is no need to power cycle the unit 4 Power voltage setting 1 SW5 1 Indoor control board Dipswitch settings must be operated with the main power turned OFF Factory setting Factory setting Set SW5 to 240V side when the power supply is 230 volts When the power supply is 208 volts set SW5 to 220V side PEFY P08NMAU E...

Page 35: ...g 1 Indoor control board Address settings must be made while the unit is stopped 7 Connection No setting 1 SW14 Rotary switch This switch is used when the unit connected to an R2 series of outdoor unit 1 Indoor control board Note Changes to the dipswitches SW11 SW12 SW14 and SW15 must be made while the unit is stopped and the remote controller is OFF All models Factory setting Factory setting Fact...

Page 36: ...1 HWE09040 GB IX Disassembly Procedure 1 Disassembly Procedure 1 Control box Exercise caution when removing heavy parts 1 Removing the control box cover 1 Remove the three fixing screws on the cover A to re move it Fig 1 Fig 2 A ...

Page 37: ...2 Thermistor Intake air Exercise caution when removing heavy parts 1 Remove the control box cover according to the procedure in section 1 2 Remove the thermistor 1 Pull out the thermistor holder B and thermistor C on the control box Fig 3 B C ...

Page 38: ... bottom plate 1 Push down the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate D E to remove it Fig 4 2 Removing the drainpan 1 Pull out the drain pan in the direction of the arrow 2 Fig 5 Note Drain the water out of the drain pan before removing it D E ...

Page 39: ... drain pan according to the procedure in sec tion 1 2 Removing the Heat exchanger cover 1 Remove the four fixing screws on the heat exchanger cov er F to remove it Fig 6 3 Removing the thermistor 1 Remove the thermistor G from the thermistor holder H on the copper tube Thermistor size Liquid pipe ø8mm Gas pipe ø6mm Fig 7 F HEX G H ...

Page 40: ...late J to re move it Fig 8 a Tab 2 Removing the fan casing bottom half 1 Squeeze the tabs on the fan casing to remove it in the di rection of arrow 2 Fig 9 3 Removing the motor cable 1 Remove the motor cable threw the rubber bush 4 Removing the fan motor and the Sirocco fan 1 Remove the two motor fixing screws to remove the motor and the Sirocco fan in the direction of arrow 3 Fig 10 2 Remove the ...

Page 41: ...ording to the procedure in section 1 2 Remove the heat exchanger cover according to the proce dure in section 4 2 3 Removing the cover 1 Remove the five fixing screws on the cover K to remove it Fig 12 K Pipe support plate 4 Removing the Heat exchanger 1 Remove the fixing screws on the heat exchanger M to re move it Fig 13 K M ...

Page 42: ...Jun 2009 HWE009040 New publication effective Jun 2009 Specifications subject to change without notice ...

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