Mitsubishi City Multi PEFY-P72NMHSU-E Technical & Service Manual
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Mitsubishi City Multi PEFY-P72NMHSU-E Technical & Service Manual

Mitsubishi City Multi PEFY-P72NMHSU-E Technical & Service Manual

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AIR CONDITIONERS
2011
TECHNICAL & SERVICE MANUAL
Model name
Model name
PEFY-P72NMHSU-E
PEFY-P96NMHSU-E

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Summary of Contents for Mitsubishi City Multi PEFY-P72NMHSU-E

  • Page 1 AIR CONDITIONERS 2011 TECHNICAL & SERVICE MANUAL Model name Model name PEFY-P72NMHSU-E PEFY-P96NMHSU-E...

  • Page 3: Safety Precautions

    Have all electrical work performed by an authorized electri- Only use accessories (i.e., air cleaners, humidifiers, electric cian according to the local regulations and the instructions heaters) recommended by Mitsubishi Electric. in this manual. Use a dedicated circuit. Insufficient power supply capacity or improper installation of the unit may result in malfunctions of the unit, electric shock, or fire.
  • Page 4 When installing the unit in a small space, take appropriate mended by Mitsubishi Electric may result in smoke, fire, or precautions to prevent leaked refrigerant from reaching the explosion.

  • Page 5: Table Of Contents

    CONTENTS [1] Components and Functions...................... 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] Disassembly Procedure......................
  • Page 6 HWE10170...

  • Page 7: Components And Functions

    XI Indoor Unit [1] Components and Functions 1. Indoor Unit (1) In case of rear inlet Air outlet Air inlet 2. Remote Controller [PAR-21MAA] Once the operation mode is selected, the unit will remain in the selected mode until changed. (1) Remote Controller Buttons [Set Temperature] Button [Vane Control] Button...
  • Page 8 (2) Remote Controller Display Current time/Timer time Louver swing Centralized control indicator Ventilation Timer OFF indicator Filter sign Timer mode indicator Sensor position Operation mode display: COOL, DRY, AUTO, Room temperature FAN, HEAT Function mode indicator Vane setting Preset temperature Fan speed Power indicator Operation lamp...

  • Page 9: Specifications

    [2] Specifications 1. Specifications Model PEFY-P72NMHSU-E PEFY-P96NMHSU-E Voltage 1-phase 208-230 Power supply Frequency 50/60 Capacity*1 Cooling kW[BTU/h] 21.1 (72,000) 28.1 (96,000) Heating kW[BTU/h] 23.4 (80,000) 31.7 (108,000) Power consumption Cooling 50Pa 0.43 0.59 [0.20in.WG] Heating Cooling 100Pa 0.52 0.70 [0.40in.WG]...
  • Page 10 2. Electrical component specifications Component Symbol Room temperature TH21 Resistance 32°F (0°C)/15kΩ, 50°F (10°C)/9.6kΩ, 68°F (20°C)/6.3kΩ, thermistor 77°F (25°C)/5.4kΩ, 86°F (30°C)/4.3kΩ, 104°F (40°C)/3.0kΩ Liquid pipe thermistor TH22 Resistance 32°F (0°C)/15kΩ, 50°F (10°C)/9.6kΩ, 68°F (20°C)/6.3kΩ, 77°F (25°C)/5.4kΩ, 86°F (30°C)/4.3kΩ, 104°F (40°C)/3.0kΩ Gas pipe thermistor TH23 Resistance 32°F (0°C)/15kΩ, 50°F (10°C)/9.6kΩ, 68°F (20°C)/6.3kΩ,...

  • Page 11: Sound Pressure Levels

    [3] Sound pressure levels 1. Sound pressure level Ceiling concealed Outlet Inlet Measurement point 2. NC curves PEFY-P72NMHSU-E External Static Pressure:50Pa, 0.20[in.WG] External Static Pressure:100Pa, 0.40[in.WG] Power Source: 208, 230V, 50Hz/60Hz Power Source: 208, 230V, 50Hz/60Hz 70.0 70.0 High High...
  • Page 12 External Static Pressure:250Pa, 1.00[in.WG] Power Source: 208, 230V, 50Hz/60Hz 70.0 High Middle 65.0 60.0 NC-60 55.0 50.0 NC-50 45.0 40.0 NC-40 35.0 30.0 NC-30 25.0 20.0 Approximate minimum NC-20 audible limit on 15.0 continuous noise 10.0 Octave band center frequencies (Hz) PEFY-P96NMHSU-E External Static Pressure:50Pa, 0.20[in.WG] External Static Pressure:100Pa, 0.40[in.WG]...
  • Page 13 External Static Pressure:250Pa, 1.00[in.WG] Power Source: 208, 230V, 50Hz/60Hz 70.0 High Middle 65.0 60.0 NC-60 55.0 50.0 NC-50 45.0 40.0 NC-40 35.0 30.0 NC-30 25.0 20.0 Approximate minimum NC-20 audible limit on 15.0 continuous noise 10.0 Octave band center frequencies (Hz) - 7 - HWE10170...

  • Page 14: Fan Performance And Corrected Air Flow

    [4] Fan performance and corrected air flow PEFY-P72NMHSU-E External static pressure :50Pa, 0.20[in.WG] External static pressure :100Pa, 0.40[in.WG] Power source:208, 230V, 50Hz/60Hz Power source:208, 230V, 50Hz/60Hz 80 [0.32] 130 [0.52] Limit Limit High High 120 [0.48] 70 [0.28] 110 [0.44] 60 [0.24]...
  • Page 15 PEFY-P96NMHSU-E External static pressure :50Pa, 0.20[in.WG] External static pressure :100Pa, 0.40[in.WG] Power source:208, 230V, 50Hz/60Hz Power source:208, 230V, 50Hz/60Hz 100 [0.40] 140 [0.56] High Limit Limit High 130 [0.52] 90 [0.36] 120 [0.48] 80 [0.32] 110 [0.44] 70 [0.28] Middle Middle 100 [0.40] 60 [0.24]...

  • Page 16: Outlines And Dimensions

    [5] Outlines and Dimensions PEFY-P72,96NMHSU-E - 10 - HWE10170...

  • Page 17: Wiring Diagram

    [6] Wiring Diagram PEFY-P72,96NMHSU-E - 11 - HWE10170...

  • Page 18: Refrigerant System Diagram

    [7] Refrigerant system diagram Gas pipe thermistor TH23 Gas pipe Liquid pipe Brazed connections Strainer (#100 mesh) Linear expansion valve Liquid pipe thermistor TH22 Heat exchanger Room temperature thermistor TH21 - 12 - HWE10170...

  • Page 19: Troubleshooting

    [8] Troubleshooting 1. Check methods 1. Component and check points (1) Thermistor Room temperature thermistor (TH21) Liquid pipe thermistor (TH22) Gas pipe thermistor (TH23) Disconnect the connector and measure the resistance between terminals with a tester. (Ambient temperature 50°F (10°C) - 86°F (30°C)) Normal Abnormal 4.3kΩ...
  • Page 20 2. Error Code Lists Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4300 0403 Serial communication error 4305 (Note) 0900 Test run 1102 1202 Discharge temperature fault 1301 Low pressure fault 1302 1402 High pressure fault...
  • Page 21 Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Indoor unit pipe tempera- ture (TH22) Temperature sensor OA processing unit pipe 5102 1217 fault temperature (TH2) HIC bypass circuit outlet temperature (TH2) Indoor unit gas-side pipe temperature (TH23) OA processing unit gas-...
  • Page 22 Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 6608 No response error MA controller signal reception error (No signal re- 6831 ception) MA remote controller signal transmission error 6832 (Synchronization error) MA remote controller signal transmission error 6833 (Hardware error)
  • Page 23 1. Error Code 0403 Serial communication error (Indoor unit) 2. Error definition and error detection method Serial communication cannot be established between the Indoor controller board and the INV board. 3. Cause, check method and remedy (1) Faulty wiring Check the following wiring connections. 1) Between Indoor controller board and Power supply board Indoor controller board Power supply board CN100...
  • Page 24 1. Error Code 2500 Drain sensor submergence (Models with a float switch) 2. Error definition and error detection method 1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.
  • Page 25 1. Error Code 2502 Drain pump fault (Models with a drain sensor) 2. Error definition and error detection method 1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water.
  • Page 26 1. Error Code 2502 Drain pump fault (Models with a float switch) 2. Error definition and error detection method 1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch. ∗Submergence of the sensor When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water.
  • Page 27 1. Error Code 2503 Drain sensor (Thd) fault 2. Error definition and error detection method If the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode. If another episode of the above condition is detected during the preliminary error, this is considered a drain sensor error.(If the short or open circuit of the thermistor is no longer detected, normal operation will be restored in 3 minutes.) This error is detected when one of the following conditions are met.
  • Page 28 1. Error Code 4116 RPM error/Motor error 2. Error definition and error detection method LOSSNAY ∗The motor keep running even if the power is OFF. ∗The thermal overload relay is ON. (Only for the three-phase model) Indoor unit If detected less than 180rpm or more than 2000rpm, the indoor unit will restart and keep running for 3 minutes.If detected again, the display will appear.
  • Page 29 1. Error Code 4225 Abnormal bus voltage rise (Indoor unit) 2. Error definition and error detection method If Vdc 425V is detected during inverter operation. 3. Cause, check method and remedy (1) Different voltage connection Check the power supply voltage on the power supply terminal block (TB2). (2) INV board failure If the problem recurs, replace the INV board.
  • Page 30 1. Error Code 4255 IPM error (Indoor unit) 2. Error definition and error detection method IPM error signal is detected. 3. Cause, check method and remedy Cause Check method and remedy Power supply environment Check the power supply voltage. Check whether the power voltage is 176V or above across all phases. Static pressure setting error Check that the static pressure setting and the design static pressure are correct.
  • Page 31 1. Error Code 4255 Short-circuited IPM/Ground fault (Indoor unit) 2. Error definition and error detection method When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter. 3. Cause, check method and remedy Cause Check method and remedy Ground fault of the fan motor Refer to [8] 3.2.[4].(page 49)
  • Page 32 1. Error Code 4255 Position detection error at startup (Indoor unit) 2. Error definition and error detection method Position error is detected by the hall sensor at inverter startup. 3. Cause, Check method and remedy Cause Check method and remedy Loose connector Check the CNCT1 and CNINV connectors on the INV board for proper connection.
  • Page 33 1. Error Code 5101 Return air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit) 5102 Pipe temperature sensor (TH22) fault (Indoor unit) Pipe temperature sensor (TH2) fault (OA processing unit) 5103 Gas-side pipe temperature sensor (TH23) fault (Indoor unit) Gas-side pipe temperature sensor (TH3) fault (OA processing unit) 5104 Intake air temperature sensor (TH1) fault (OA processing unit)
  • Page 34 1. Error Code 5110 Heatsink temperature sensor (THHS) fault (Indoor unit) 2. Error definition and error detection method When a short or an open of THHS is detected just before or during the inverter operation. 3. Cause, check method and remedy Cause Check method and remedy Loose connector...
  • Page 35 1. Error Code 5305 Open-circuited IPM/Loose ACCT connector (Indoor unit) 2. Error definition and error detection method ACCT sensor detected that not enough current is available. 3. Cause, check method and remedy Cause Check method and remedy Disconnected ACCT sensor Check CNCT2 on the INV board for proper connection.
  • Page 36 1. Error Code 6600 Address overlap 2. Error definition and error detection method An error in which signals from more than one indoor units with the same address are received The address and attribute that appear on the remote controller indicate the controller that detected the error. 3.

  • Page 37: Error Code

    1. Error Code 6602 Transmission processor hardware error 2. Error definition and error detection method Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 38 1. Error Code 6603 Transmission line bus busy error 2. Error definition and error detection method Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 39 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 40 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 41 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 42 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 43 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 44 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 45 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 46 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 47 1. Error Code 6608 No response error 2. Error definition and error detection method When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- When the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 48 1. Error Code 6831 MA controller signal reception error (No signal reception) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes. 3.
  • Page 49 1. Error Code 6832 MA remote controller signal transmission error (Synchronization error) 2. Error definition and error detection method MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals ∗Indoor unit : 3 minutes ∗Remote controller : 6 seconds 3.
  • Page 50 1. Error Code 6833 MA remote controller signal transmission error (Hardware error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. An error occurs when the transmitted data and the received data differ for 30 times in a row. 3.

  • Page 51: Error Code 6834

    1. Error Code 6834 MA controller signal reception error (Start bit detection error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 2 minutes. 3.
  • Page 52 1. Error Code 7101 Capacity code setting error 2. Error definition and error detection method Connection of incompatible (wrong capacity code) indoor unit or outdoor unit 3. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit The model name (capacity code) set by Check the model name (capacity code) of the in-...
  • Page 53 3. DC fan motor (fan motor/INV board) If there are problems only with the fan motor, replace the fan motor only. (Fan motor failure will cause an overcurrent to pass through the inverter, but the inverter is protected from damage with the protection function that will stop the inverter when an overcurrent is detected.) If the inverter fails, replace the failed components on the inverter.
  • Page 54 2. Troubleshooting the inverter output-related problems Check items Symptoms Actions to take (1) Turn off the breaker. 1) Overcurrent errors Replace the INV board. Check the Error code:4255 Be sure to turn off the INV board breaker. error detec- (2) Disconnect the connec- 2) Logic error Replace the INV board.
  • Page 55 Check items Symptoms Actions to take (1) Turn off the breaker. 1) The units stop within 10 sec- Check to see if the fan motor is locked. Check for onds of startup, and a posi- Replace the fan motor if it is locked. inverter tion detection error or an If the problem persists after replacing...
  • Page 56 4. Simple check on the main inverter circuit components Turn off the power supply, take the following components out of the control box, and then check the components. Parts name Evaluation criteria Diode bridge Refer to "5. Troubleshooting the diode bridge". Inrush current limiting resistor R Measure the resistance between terminals : 22 Ω...
  • Page 57 LEV operation An LEV (Indoor unit: Linear expansion valve), is a stepping-motor-driven valve that operates by receiving the pulse signals from the indoor and outdoor unit control boards. 1. Indoor LEV The valve opening changes according to the number of pulses. (1) Indoor controller board and LEV connection.
  • Page 58 2. Judgment methods and possible failure mode Malfunction Judgment method Remedy mode Microcomputer Disconnect the control board connector and connect When the drive circuit has a driver circuit fail- the check LED as shown in the figure below. problem, replace the control board.
  • Page 59 5. Address switch setting Make sure that power to the unit is turned off. Indoor controller board SW14 SW12 SW11 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,"...
  • Page 60 6. Test point diagram 1. Indoor controller board CN100 CN2M For M-NET transmission cable con- nection (24 - 30VDC) CN2M Emergency operation Capacity setting Function setting Function setting CN41 CN32 Remote start/stop adapter CN3A CN51 CN3A For MA remote controller cable con- CN52 nection (10 - 13 VDC (Between 1 and 3.))
  • Page 61 3. Power supply board CN100 CNPW2 Connect to the NF board CNPW2 CNCX1 Connect to the indoor controller CN2M board CNRSC Connect to the indoor controller CN18V board CNRSP Connect to the INV board CN18V Connect to the INV board CN41 CN3A CN51...
  • Page 62 7. Dipswitch setting (Factory setting) 1. Function setting (1) SW1 Switch position Function Switch setting Active Thermistor Built-in thermistor on the remote Indoor unit (Intake air thermistor) controller Filter clogging detection Available Unavailable Filter life 2500 hr 100 hr Outdoor air intake Enabled Disabled Remote display...
  • Page 63 2. Capacity code setting (1) SW2 Dipswitch settings must be made while the unit is stopped. Factory setting The switches are set to correspond to the unit capacity. PEFY-P72 PEFY-P96 3. Model setting (1) SW4 1) Indoor controller board Dipswitch settings must be made while the unit is stopped. Factory setting Note: Changes made to the dipswitches SW1, SW2, and SW3 will become effective when the unit comes to a stop (remote controller...
  • Page 64 When using PAR-30MAA remote controller, the static pressure settings can be made from the remote controller. To set the external static pressure from the function selection screen on the remote controller (Only PAR-30MAA) Follow the instructions below and the instructions detailed in the remote controller manual for how to set the switches. 1.
  • Page 65 6. 1s and 10ths digits (1) SW11, SW12 (Rotary switch) The use of a network remote controller (PAR-F27MEA) requires address setting. 1) Indoor control board Address settings must be made while the unit is stopped. Factory setting 7. Connection No. setting (1) SW14 (Rotary switch) This switch is used when the unit connected to an R2 series of outdoor unit.

  • Page 66: Disassembly Procedure

    [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 - 60 - HWE10170...
  • Page 67 2. Thermistor (Intake air) Exercise caution when removing 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) and thermistor (C) on the control box.
  • Page 68 3. Thermistor (Gas pipe) (Liquid pipe) · LEV Exercise caution when removing heavy parts. 1. Remove the control box cover according to the proce- dure in section 1. Control box. 2. Removing the maintenance cover (1) Remove the ten fixing screws on the cover (D) , cover (E) , and cover (F) to remove the maintenance cover.
  • Page 69 4. Drainpan Exercise caution when removing heavy 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 Note Drain the water out of the drain pan before...
  • Page 70 5. Heat exchanger Exercise caution when removing heavy parts. 1. Remove the control box cover according to the proce- dure in section 1. Control box. 2. Remove the maintenance cover according to the pro- cedure in section 3. Thermistor (Gas pipe) (Liquid pipe) ·...
  • Page 71 6. Reactor, fan, and fan motor Exercise caution when removing heavy parts. 1. Remove the control box cover according to the proce- Noise filter board dure in section 1. Control box. INV board 2. Removing the fan motor and ACL cable (1) Disconnect the connector (CNCT1) from the INV board and connector (CNACL) from the noise filter board.
  • Page 72 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 - 66 - HWE10170...

  • Page 73: Optional Parts

    [10] Optional parts Drain pump PAC-KE05DM-F Long-life filter PAC-KE85LAF Filter box PAC-KE250TB-F External heater adaptor PAC-YU25HT - 67 - HWE10170...
  • Page 76 http://Global.MitsubishiElectric.com New publication effective July 2011 HWE10170 Specifications subject to change without notice Printed in Japan...

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