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Mitsubishi City Multi PEFY-P72NMHSU-E, Technical & Service Manual, Page: 72 / 76

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Mitsubishi City Multi PEFY-P72NMHSU-E Technical & Service Manual Download Page 72

66

- 66 -

HWE10170

GB

Exercise caution when removing heavy parts.

7.  Removing the fan and fan motor
(1)  Remove the two fixing screws and attachment on the 

fan motor  (W).

(2)  Pull out the fan motor in the direction of the arrow.

Fig.14

(W)

HWE10170.book  66 ページ  ２０１１年７月１９日　火曜日　午後２時５７分

Summary of Contents for City Multi PEFY-P72NMHSU-E

Page 1: ...TECHNICAL SERVICE MANUAL Model name Model name PEFY P72NMHSU E PEFY P96NMHSU E 2011 AIR CONDITIONERS...

Page 2: ......

Page 3: ...nit 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...

Page 4: ...an 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 ma...

Page 5: ...ons 1 2 Specifications 3 3 Sound pressure levels 5 4 Fan performance and corrected air flow 8 5 Outlines and Dimensions 10 6 Wiring Diagram 11 7 Refrigerant system diagram 12 8 Troubleshooting 13 9 Di...

Page 6: ...HWE10170 GB...

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 1 Set Temperature Button 7 Vane Control Button 2...

Page 8: ...alized 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 i...

Page 9: ...100Pa 0 40in WG Cooling A 2 79 3 75 Heating A 150Pa 0 60in WG Cooling A 3 32 4 43 Heating A 200Pa 0 80in WG Cooling A 3 95 5 10 Heating A 250Pa 1 00in WG Cooling A 4 81 5 29 Heating A External finish...

Page 10: ...10 C 9 6k 68 F 20 C 6 3k 77 F 25 C 5 4k 86 F 30 C 4 3k 104 F 40 C 3 0k Gas pipe thermistor TH23 Resistance 32 F 0 C 15k 50 F 10 C 9 6k 68 F 20 C 6 3k 77 F 25 C 5 4k 86 F 30 C 4 3k 104 F 40 C 3 0k Fus...

Page 11: ...60 NC 50 Octave band pressure level dB 0dB 20 Pa NC 40 NC 30 NC 20 Octave band center frequencies Hz External Static Pressure 100Pa 0 40 in WG Power Source 208 230V 50Hz 60Hz Approximate minimum audib...

Page 12: ...High Middle Low 10 0 15 0 20 0 25 0 30 0 35 0 40 0 45 0 50 0 55 0 60 0 65 0 70 0 63 125 250 500 1k 2k 4k 8k NC 60 NC 50 Octave band pressure level dB 0dB 20 Pa NC 40 NC 30 NC 20 Octave band center fre...

Page 13: ...dle Low 10 0 15 0 20 0 25 0 30 0 35 0 40 0 45 0 50 0 55 0 60 0 65 0 70 0 63 125 250 500 1k 2k 4k 8k NC 60 NC 50 Octave band pressure level dB 0dB 20 Pa NC 40 NC 30 NC 20 Octave band center frequencies...

Page 14: ...c pressure Pa in WG Airflow rate m3 min cfm 2825 80 2648 75 2472 70 2295 65 2119 60 1942 55 1412 40 1766 50 1589 45 60 0 24 70 0 28 80 0 32 90 0 36 100 0 40 110 0 44 120 0 48 130 0 52 140 0 56 150 0 6...

Page 15: ...0 36 100 0 40 110 0 44 120 0 48 130 0 52 140 0 56 150 0 60 160 0 64 170 0 68 180 0 72 190 0 76 Middle High Low Limit Airflow rate m3 min cfm 3178 90 3001 85 2825 80 2648 75 2472 70 2295 65 1766 50 211...

Page 16: ...field supply 2 Keep the service space for the maintenance from the bottom when the heat exchanger is cleaned 3 Keep the service space for the maintenance from the bottom when the fan motor is changed...

Page 17: ...t is being powerd Be sure to turn off the SWE after completing a drainage test or test run 3 The wirings to TB2 TB5 TB15 shown in dotted line are field work 4 Mark indicates terminal block connector 5...

Page 18: ...ystem 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 th...

Page 19: ...the page on DC fan motor fan motor INV board page 47 3 Linear expansion valve Refer to the page on LEV 8 4 page 51 Normal Abnormal 4 3k 9 6k Open or short Refer to the thermistor characteristic graph...

Page 20: ...Power supply signal sync error O 4116 RPM error Motor error O O 4220 4225 Note 4320 4325 Note 108 Abnormal bus voltage drop O O 109 Abnormal bus voltage rise O O 111 Logic error O O 131 Low bus volta...

Page 21: ...re TH6 O 5107 1221 Temperature sensor fault Outside temperature TH7 O 5110 1214 01 Temperature sensor fault Heatsink temperature THHS O O 5201 High pressure sensor fault 63HS1 O 5301 5305 4300 4305 11...

Page 22: ...error O O 6833 MA remote controller signal transmission error Hardware error O O 6834 MA controller signal reception error Start bit de tection error O O 7100 Total capacity error O 7101 Capacity cod...

Page 23: ...Applicable to the units manufactured in or after October 2006 2 If the immersion of the sensor in the water is detected four consecutive times at an hour interval this is considered water leak age and...

Page 24: ...e was detected it is not detected that the drain pump goes from OFF to ON The operation mode is changed to Cool Dry The liquid pipe temperature minus the inlet temperature is 10 C 18 F or less 3 Cause...

Page 25: ...than Fan or Stop to an error stop 2502 appears on the monitor of the units that came to an error stop 6 Forced stoppage of the outdoor unit Detection timing The error is detected whether the unit is i...

Page 26: ...brings the outdoor unit in the same refrigerant circuit to an error stop compressor operation prohibited and the outdoor unit brings all the indoor units in the same refrigerant circuit that are in an...

Page 27: ...ined open circuited for 100 consecutive secondsduring operation 3 Cause check method and remedy 2503 Cause Check method and remedy 1 Faulty connector CN31 insertion 1 Check for connector connection fa...

Page 28: ...CL NF board and inrush current resistor NF board and DB01 NF board and INV board NF board and indoor controller board 2 Check the inrush current resistance Measure the interphase resistance of the res...

Page 29: ...Code Heatsink overheat protection Indoor unit 2 Error definition and error detection method When the heat sink temperature THHS remains at or above 85 C 185 F is detected 3 Cause check method and rem...

Page 30: ...e Check method and remedy 1 Power supply environment Check the power supply voltage Check whether the power voltage is 176V or above across all phases 2 Static pressure setting error Check that the st...

Page 31: ...or definition and error detection method When a short is detected on the load side just before starting the inverter operation 3 Cause Check method and remedy Refer to section 8 Troubleshooting item 3...

Page 32: ...Position error is detected by the hall sensor during operation 3 Cause Check method and remedy Refer to section 8 Troubleshooting item 3 DC fan motor fan motor INV board for error codes related to the...

Page 33: ...tes When the error is not restored after 3 minutes if restored the outdoor unit runs normally the outdoor unit makes an error stop Short detectable at 90 C 194 F or higher Open detectable at 40 C 40 F...

Page 34: ...cted by the ACCT detection circuit immediately before the inverter starts 3 Cause check method and remedy Refer to section 8 Troubleshooting item 3 DC fan motor fan motor INV board for error codes rel...

Page 35: ...tion 3 Cause check method and remedy 1 CN4F disconnection or contact failure Check for disconnection of the connector CN4F on the indoor controller board 5305 Cause Check method and remedy 1 Disconnec...

Page 36: ...E remote controllers Example 6600 01 appears on the remote controller Unit 01 detected the error Two or more units in the system have 01 as their ad dress Find the unit that has the same address as th...

Page 37: ...ed to different outdoor units or in case of the system connected with MELANS 4 Check method and remedy 6602 NO Tightly reconnect the male power supply connector to the female power supply switch conne...

Page 38: ...emote controller indicates the controller where an error oc curred 3 Cause check method and remedy 6603 Cause Check method and remedy 1 The transmission processor cannot be transmit ted as the short w...

Page 39: ...remote controller MA No acknowl edgement ACK at RC transmis sion to IC 1 When IC unit address is changed or modified during operation Turn off the outdoor indoor units for 5 or more minutes and turn t...

Page 40: ...the outdoor and indoor units for 5 or more minutes and turn them on again If the error is accidental the will run normal ly If not check the cause 2 2 Disconnection or short circuit of the transmissi...

Page 41: ...connect ed to different outdoor units 1 Turn off the power source of LOSSNAY for 5 or more min utes and turn it on again If the error is accidental it will run normally If not check the cause 2 2 Disc...

Page 42: ...r 5 or more min utes and turn it on again If the error is accidental it will run normally If not check the cause 2 2 Disconnection or short circuit of the transmission line for the outdoor unit on the...

Page 43: ...cknowl edgement ACK at SC transmis sion to IC 1 Error occurrence on some IC Same remedy as that for system with one outdoor unit 1 Same cause as that for system with one outdoor unit 2 Error occurrenc...

Page 44: ...dy as that for system with one outdoor unit 1 Same cause as that for system with one outdoor unit 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troublesh...

Page 45: ...mote controller failure 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troubleshooting on the out door unit 1 An error is found by the outdoor unit Total...

Page 46: ...on of non existing address which some indoor units have Use either of the following two methods for deletion 2 Although the address of LOSSNAY has been changed after the interlock registration of LOSS...

Page 47: ...tage signal by exceeding acceptable range of transmission wiring Farthest 200m 656ft or less Remote controller wiring 12m 39ft or less 4 The transmission line voltage signal is decreased due to errone...

Page 48: ...from the remote controller 4 Check method and remedy 1 Check for disconnected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the main...

Page 49: ...disconnected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the main power source and the remote controller line 3 Confirm that MA r...

Page 50: ...ected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the main power source and the remote controller line 3 Confirm that MA remote co...

Page 51: ...ls from the remote controller 4 Check method and remedy 1 Check for disconnected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the m...

Page 52: ...is different from that of the unit connected turn off the power source of the outdoor and the indoor units and change the setting of the capacity code The capacity of the indoor unit can be confirmed...

Page 53: ...symptoms Check items 1 Inverter related errors 4255 4225 4235 5110 5305 Check the error history on the outdoor unit circuit board LED 2 Main power breaker is tripped 1 Check the breaker capacity 2 Che...

Page 54: ...n off the power before disconnecting the connector CNINV 5 Open circuited IPM or dis connected ACCT sensor Error code 5305 Normal 2 Check the inverter for damage unloaded 1 Turn off the breaker Be sur...

Page 55: ...oltage imbalance is detected go to item 4 b If no problems were found with item 4 replace the INV board c If the problem persists after replacing the INV board replace the fan motor 4 Check the fan mo...

Page 56: ...diode resistance measurement cannot be obtained with a button battery operated card tester because of its low applied voltage Use a tester that can measure in small increments It will allow for more a...

Page 57: ...FF 4 OFF OFF ON ON Output pulses change in the following orders when the Valve is closed 1 2 3 4 1 Valve is open 4 3 2 1 4 1 When the LEV opening angle does not change all the output phases will be of...

Page 58: ...rmal if resistance is 150ohm 10 Replace the LEV coils Incomple sealing leak from the valve When checking the refrigerant leak from the indoor LEV run the target indoor unit in the fan mode and the oth...

Page 59: ...e unit is turned off Indoor controller board 1 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...

Page 60: ...as temperature CN4F Connector for float switch CN20 Thermistor Inlet temperature CN100 Connect to the Power supply board CNDP Power supply voltage 220 240VAC CNACL Connect to the AC reactor CNR1 Conne...

Page 61: ...the NF board CNINV Connect to the FAN motor Power line CN15V Connect to the Power supply board CNRS2 Connect to the Power supply board CNCT1 Connect to the FAN motor Rotor position sensor input CNCT2...

Page 62: ...Filter life 2500 hr 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...

Page 63: ...ctive regardless of the unit s operation status RUN STOP or the remote controller status ON OFF CAUTION If the static pressure setting for the duct is lower than that for the unit the fan of the unit...

Page 64: ...32 No 8 No 10 Switch setting 1 O 50Pa 1 1 Function selection 2 100Pa 2 1 150Pa 3 1 O 200Pa 2 2 250Pa 3 2 1 Select Function setting from the Service menu to bring up the Function setting screen Refer t...

Page 65: ...oard 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 b...

Page 66: ...60 HWE10170 GB 9 Disassembly Procedure 1 Control box Exercise caution when removing heavy parts 1 Removing the control box cover 1 Remove the two fixing screws on the cover A to re move it Fig 1 Fig 2...

Page 67: ...ng heavy parts 1 Remove the control box cover according to the proce dure in section 1 Control box 2 Disconnect the connector CN20 from the Indoor con troller board 3 Pull out the thermistor holder B...

Page 68: ...ig 4 3 Removing the thermistor 1 Disconnect the connector CN44 from the Indoor con troller board 2 Remove the thermistor G from the thermistor holder H on the copper tube Thermistor size Liquid pipe 8...

Page 69: ...vy parts 1 Removing the bottom plate 1 Remove the twelve fixing screws on the bottom plate L to remove it Fig 6 2 Removing the drainpan 1 Pull out the drain pan M in the direction of the arrow Fig 7 N...

Page 70: ...r according to the pro cedure in section 3 Thermistor Gas pipe Liquid pipe LEV 3 Remove the thermistor and disconnect LEV connector according to the procedure in section 3 Thermistor Gas pipe Liquid p...

Page 71: ...onnector 2 Remove the ground wire on the motor from the white connector 3 Remove the cable through the rubber bush 3 Removing the bottom plate 1 Remove the ten fixing screws on the bottom plate T to r...

Page 72: ...170 GB Exercise caution when removing heavy parts 7 Removing the fan and fan motor 1 Remove the two fixing screws and attachment on the fan motor W 2 Pull out the fan motor in the direction of the arr...

Page 73: ...67 67 HWE10170 GB 10 Optional parts Drain pump PAC KE05DM F Long life filter PAC KE85LAF Filter box PAC KE250TB F External heater adaptor PAC YU25HT...

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Page 76: ...http Global MitsubishiElectric com HWE10170 Printed in Japan New publication effective July 2011 Specifications subject to change without notice...

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