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Mitsubishi Electric CITY MULTI PVFY-P12NAMU-E Technical & Service Manual

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Summary of Contents for Mitsubishi Electric CITY MULTI PVFY-P12NAMU-E

  • Page 2 It may also be in violation of applicable laws. Only use accessories (i.e., air cleaners, humidifiers, electric MITSUBISHI ELECTRIC CORPORATION cannot be held heaters) recommended by Mitsubishi Electric. responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.
  • Page 3 Mitsubishi Electric may result in smoke, fire, or Only use the type of refrigerant that is indicated on the unit explosion.
  • Page 4 Precautions for handling units for use with R410A CAUTION Do not use the existing refrigerant piping. Only use R410A. A large amount of chlorine that may be contained in the re- The use of other types of refrigerant that contain chloride sidual refrigerant and refrigerator oil in the existing piping may cause the refrigerator oil to deteriorate.
  • Page 5 HWE1405A...

  • Page 6: Table Of Contents

    CONTENTS I Features [1] Features............................ 1 II Components and Functions [1] Components and Functions...................... 2 III Specifications [1] Specifications..........................5 1.Specifications.......................... 5 2.Electrical component specifications..................7 IV Outlines and Dimensions [1] Outlines and Dimensions......................8 V Wiring Diagram [1] Wiring Diagram ........................10 VI Refrigerant System Diagram [1] Refrigerant system diagram....................
  • Page 7 HWE1405A...

  • Page 8: Features

    [ I Features ] I Features [1] Features Model Cooling capacity/Heating capacity BTU/h PVFY-P12NAMU-E 12000/13500 3.5/4.0 PVFY-P18NAMU-E 18000/20000 5.3/5.9 PVFY-P24NAMU-E 24000/27000 7.0/7.9 PVFY-P30NAMU-E 30000/34000 8.8/10.0 PVFY-P36NAMU-E 36000/40000 10.6/11.7 PVFY-P48NAMU-E 48000/54000 14.1/15.8 PVFY-P54NAMU-E 54000/60000 15.8/17.6 - 1 - HWE1405A...

  • Page 9: Components And Functions

    [ II Components and Functions ] II Components and Functions [1] Components and Functions 1. Indoor (Main) Unit (1) Vertical (2) Horizontal Right Air outlet inlet outlet Air inlet (3) Horizontal Left (4) Down Flow Air inlet inlet outlet Air outlet - 2 - HWE1405A...
  • Page 10 [ II Components and Functions ] 2. Remote Controller [PAC-YT53CRAU] Once the operation mode is selected, the unit will remain in the selected mode until changed. (1) Remote Controller Buttons ON/OFF lamp The lamp will light up in green when turned on, and blink during startup and when an error occurs.
  • Page 11 [ II Components and Functions ] (2) Remote Controller Display * All icons are displayed for explanation. CENTRAL icon *1 CHECK icon *2 Preset temperature *3 icon appears while the unit is operated in the energy-save mode icon appears when Operation lock setting is effective.

  • Page 12: Specifications

    [ III Specifications ] III Specifications [1] Specifications 1. Specifications Model PVFY-P12NAMU-E PVFY-P18NAMU-E PVFY-P24NAMU-E PVFY-P30NAMU-E Power source 1-phase 208/230V 60Hz Cooling capacity BTU / h 12,000 18,000 24,000 30,000 (Nominal) Power input 0.08 0.13 0.18 0.21 Current input 0.80/0.70 1.20/1.10 1.60/1.40 2.00/1.70 Heating capacity...
  • Page 13 [ III Specifications ] Model PVFY-P36NAMU-E PVFY-P48NAMU-E PVFY-P54NAMU-E Power source 1-phase 208/230V 60Hz Cooling capacity BTU / h 36,000 48,000 54,000 (Nominal) 10.6 14.1 15.8 Power input 0.34 0.42 0.48 Current input 3.00/2.70 3.50/3.30 3.90/3.70 Heating capacity BTU / h 40,000 54,000 60,000...

  • Page 14: Electrical Component Specifications

    [ III Specifications ] 2. Electrical component specifications Component Sym- PVFY- PVFY- PVFY- P12NAMU-E P18NAMU-E P24NAMU-E Room temperature TH21 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k thermistor Liquid pipe thermistor TH22 Resistance 0°C/15k , 10°C/9.6k , 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...

  • Page 15: Outlines And Dimensions

    [ IV Outlines and Dimensions ] IV Outlines and Dimensions [1] Outlines and Dimensions 1. PVFY-P12,18, 24, 30, 36, 48, 54NAMU-E Unit : mm(in.) - 8 - HWE1405A...
  • Page 16 [ IV Outlines and Dimensions ] Unit : mm(in.) - 9 - HWE1405A...

  • Page 17: Wiring Diagram

    [ V Wiring Diagram ] V Wiring Diagram [1] Wiring Diagram 1. PVFY-P12, 18, 24, 30, 36, 48, 54NAMU-E - 10 - HWE1405A...

  • Page 18: Refrigerant System Diagram

    [ VI Refrigerant System Diagram ] VI Refrigerant System Diagram [1] 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 Capacity PVFY-P12, 18NAMU-E PVFY-P24, 30, 36, 48, 54NAMU-E...

  • Page 19: Microprocessor Control

    [ VII Microprocessor Control ] VII Microprocessor Control [1] Microprocessor Control 1. Cool operation <How to operate> 1. Press POWER button. ON/OFF 2. Press the operation button to display COOL. MODE 3. Press the button to set the desired temperature. TEMP.

  • Page 20: Fan Operation

    [ VII Microprocessor Control ] 2. Fan operation <How to operate> 1. Press POWER button. ON/OFF 2. Press the operation button to display FAN. MODE 1. Fan (1) Set by remote controller. Type Fan speed notch 3 speeds + Auto type [Low], [Med], [High], [Auto] When [Auto] is set, fan speed becomes [Low].

  • Page 21: Heat Operation

    [ VII Microprocessor Control ] 3. Heat operation <How to operate> 1. Press POWER button. ON/OFF 2. Press the operation button to display HEAT. MODE 3. Press the button to set the desired temperature. TEMP. The set temperature changes 2°F when the button is TEMP.

  • Page 22: Auto Operation [Automatic Cool / Heat Change Over Operation]

    [ VII Microprocessor Control ] (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. This control is same for the model without auxiliary heater. (4) Thermo OFF mode When the thermoregulating function changes to OFF, the indoor fan operates in [Extra low].

  • Page 23: Heater Control

    [ VII Microprocessor Control ] 5. Heater control 1. Control specifications and DIP S/W setting Table 1 shows how the field-installed heater is controlled. Select the desired pattern 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 #1, 2, and 3.
  • Page 24 [ VII Microprocessor Control ] Table 2 When indoor units are connected to the PUHY/PURY/PQHY/PQRY series of outdoor units Heater control DIP switch Initial setting setting Pattern Output Details SW3-2 SW3-4 Heater OFF (Enable Inlet air temp. set temp. ≥ +0.9°F(+0.5°C) heater Heater ON...
  • Page 25 [ VII Microprocessor Control ] Table 3 When indoor units are connected to the PUMY series of outdoor units Heater control DIP switch Initial setting setting Pattern Output Details SW3-2 SW3-4 Heater OFF (Enable Inlet air temp. set temp. ≥ heater Heater ON basic...
  • Page 26 [ VII Microprocessor Control ] (1) Turning on the heater with the fan setting set to OFF requires that the DIP S/W and connectors on the indoor units are set on site. Fan control Pattern PVFY-NAMU-E Fan (All modes other CN22 for FAN control (YU25) DIP S/W3-4 (Indoor unit) Fan in defrost...
  • Page 27 [ VII Microprocessor Control ] To extend this length, use sheathed 2-core cable. Control cable type: CVV, CVS, CPEV or equivalent. Cable size: 0.5 mm ~ 1.25 mm (16 to 22 AWG) Don't extend the cable more than 10 meters (32ft) Recommended circuit 1-phase power supply...

  • Page 28: Humidifier Control

    [ VII Microprocessor Control ] 6. Humidifier control 1. Control specifications and DIP S/W setting The below table shows how the field installed humidifier and fan speed is controlled. DIP switch Humidistat Condition (no defrost/no error) CN25 output Fan speed setting output SW1 6...

  • Page 29: Troubleshooting

    [ VIII Troubleshooting ] VIII Troubleshooting [1] 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 10°C - 30°C[50°F-86°F]) Normal Abnormal...
  • Page 30 [ VIII Troubleshooting ] 1) Summary of linear expansion valve (LEV) operation The LEV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. The LEV position changes in response to the pulse signal. Indoor control board and LEV connection 12VDC Control board...
  • Page 31 [ VIII Troubleshooting ] 2) LEV operation Close Open Fully open valve (2000 pulses or 3000 pulses) No. of pulses Extra tightening (41 - 100 pulse) Valve opening degree When the power is turned on, a pulse signal of fully open pulse + 10% pulse is output (valve closure signal), to bring the valve to position A.
  • Page 32 [ VIII Troubleshooting ] Symptom Checking Criteria Remedy Valve closure fail- To check the LEV on the indoor unit, check the indoor unit liquid pipe temperature Replace the LEV ure (leaky valve) that appears on the operation monitor on the outdoor unit's multi control board while if the amount of operating the indoor unit in question in the FAN mode and the other indoor units in leakage is great.

  • Page 33: Dc Fan Motor (Fan Motor/Indoor Control Board)

    [ VIII Troubleshooting ] 2. DC fan motor (fan motor/indoor control board) 1. CAUTION A high voltage is applied to the connector for connection to the fan motor (CNMF). Do not unplug the connector CNMF with the unit energized to avoid damage to the indoor control board and fan motor. 2.

  • Page 34: Address Switch Setting

    [ VIII Troubleshooting ] 3. Address switch setting Make sure that power to the unit is turned off. Indoor unit control board Factory setting (all models) 1. When using an ME remote controller, set the address with the rotary switches (SW11, SW12). Address setting is not required when the unit remote controller is used.

  • Page 35: Voltage Test Points On The Control Board

    [ VIII Troubleshooting ] 4. Voltage test points on the control board 1. PVFY-P12, 18, 24, 30, 36, 48, 54NAMU-E Fuse (AC 250V 6.3A) Power supply voltage (220 - CN2M 240VAC) CN2M For M-NET transmission cable connection (24 - 30VDC) Emergency operation Capacity setting CN41...

  • Page 36: Dipswitch Setting (Factory Setting)

    [ VIII Troubleshooting ] 5. Dipswitch setting (Factory setting) 1. Function setting (1) SW1 Switch position Function Switch setting Active Thermistor (Intake air Built-in thermistor on the remote Indoor unit thermistor) controller Filter clogging detection Available Unavailable Filter life 2500 hr 100 hr Outdoor air intake Enabled...
  • Page 37 [ VIII Troubleshooting ] 2. Capacity code setting (1) SW2 1) Indoor control board Dipswitch settings must be made while the unit is stopped. Factory setting The switches are set to correspond to the unit capacity. PVFY-P12NAMU-E PVFY-P18NAMU-E PVFY-P24NAMU-E PVFY-P30NAMU-E PVFY-P36NAMU-E PVFY-P48NAMU-E PVFY-P54NAMU-E...
  • Page 38 [ VIII Troubleshooting ] 5. External static pressure (1) SWA, SWC 1) Indoor control board All models Factory setting Vertical, Horizontal Right, Horizontal left 75Pa(0.30in.WG) 125Pa(0.50in.WG) 200Pa(0.80in.WG) Down flow 75Pa(0.30in.WG) 125Pa(0.50in.WG) 200Pa (0.80in.WG) *PVFY-P36 in Downflow External static pressure: 150Pa (0.60in.WG) PVFY-P54 in Downflow External static pressure: 175Pa (0.70in.WG) Note: Changes that are made to the dipswitches SWA and SWC immediately become effective regardless of the unit's operation...

  • Page 39: Disassembly Procedure

    [ IX Disassembly Procedure ] IX Disassembly Procedure [1] Disassembly Procedure 1. Control box Exercise caution when removing heavy parts. 1. Remove the Electric panel (2 screws) 2. Remove the Control box cover (1 screw) Fig.1 Fig.2 - 32 - HWE1405A...

  • Page 40: Thermistor (Return Air)

    [ IX Disassembly Procedure ] 2. Thermistor (Return Air) Exercise caution when removing heavy parts. 1. Remove the Filter panel (2 thumbscrews). 2. Remove the Blower panel (2 screws). Fig.3 3. Remove the cover over the Return Air thermistor box and unplug the thermistor.

  • Page 41: Coil Assembly (Thermistor, Drainpan, Heat Exchanger)

    [ IX Disassembly Procedure ] 3. Coil Assembly (thermistor, drainpan, heat exchanger) Exercise caution when removing heavy parts. 1. Remove the Electrical, Blower and Filter panel indicated in sections 1 and 2. 2. Remove the Coil panel by removing all of the screws se- curing it to the (3) smaller panels for refrigerant and drain lines.
  • Page 42 [ IX Disassembly Procedure ] 5. Remove the plate covering the coil assembly to access the thermistors. Fig.9 6. Remove lower and side drain pan. Fig.10 - 35 - HWE1405A...

  • Page 43: Blower/Fan Assembly

    [ IX Disassembly Procedure ] 4. Blower/Fan Assembly Exercise caution when removing heavy parts. 1. Remove the Blower and Filter panel (along with filter if installed) indicated in section 2. 2. Remove the (1 or 2) brackets that secure the coil as- sembly.

This manual is also suitable for:

City multi pvfy-p30namu-eCity multi pvfy-p24namu-eCity multi pvfy-p36namu-eCity multi pvfy-p18namu-eCity multi pvfy-p48namu-eCity multi pvfy-p54namu-e

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