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Mitsubishi Electric CITY MULTI PFFY-WL20VCM-A Technical & Service Manual
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Mitsubishi Electric CITY MULTI PFFY-WL20VCM-A Technical & Service Manual

Mitsubishi Electric CITY MULTI PFFY-WL20VCM-A Technical & Service Manual

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Summary of Contents for Mitsubishi Electric CITY MULTI PFFY-WL20VCM-A

  • Page 2 - Forced operation of the pressure switch or the temperature switch by defeat- ing the safety features for these devices, or the use of accessories other than Indicates important instructions. the ones that are recommended by Mitsubishi Electric may result in smoke, fire, or explosion. Consult your dealer for proper disposal method.
  • Page 3 HWE22200...
  • Page 4 CONTENTS I Features [1] Features............................ 1 II Components and Functions [1] Components and Functions...................... 2 III Specifications [1] Specifications..........................3 1.Specifications.......................... 3 2.Electrical component specifications..................7 IV Outlines and Dimensions [1] Outlines and Dimensions......................8 V Wiring Diagram [1] Wiring Diagram ........................16 VI Water System Diagram [1] Water System Diagram......................
  • Page 5 HWE22200...
  • Page 6 [ I Features ] [1] Features I Features <PFFY-WL20, 25, 32, 40, 50VCM-A> <PFFY-WL20, 25, 32, 40, 50VEM-A> Concealed type Exposed type Model Cooling capacity/Heating capacity PFFY-WL20VCM-A 2.2/2.5 PFFY-WL20VEM-A PFFY-WL25VCM-A 2.8/3.2 PFFY-WL25VEM-A PFFY-WL32VCM-A 3.6/4.0 PFFY-WL32VEM-A PFFY-WL40VCM-A 4.5/5.0 PFFY-WL40VEM-A PFFY-WL50VCM-A 5.6/6.3 PFFY-WL50VEM-A - 1 - HWE22200...
  • Page 7 [ II Components and Functions ] [1] Components and Functions II Components and Functions 1. Indoor (Main) Unit <PFFY-WL20, 25, 32, 40, 50VCM-A> <PFFY-WL20, 25, 32, 40, 50VEM-A> - 2 - HWE22200...
  • Page 8 [ III Specifications ] [1] Specifications III Specifications 1. Specifications Model name PFFY- PFFY- PFFY- WL20VCM-A WL25VCM-A WL32VCM-A Power source ~ 220-240V 50Hz/60Hz Cooling capacity Heating capacity Power consumption Cooling 0.022 0.029 0.035 Heating 0.022 0.029 0.035 Current Cooling 0.25 0.33 0.38 Heating...
  • Page 9 [ III Specifications ] Model name PFFY- PFFY- WL40VCM-A WL50VCM-A Power source ~ 220-240V 50Hz/60Hz Cooling capacity Heating capacity Power consumption Cooling 0.038 0.062 Heating 0.038 0.062 Current Cooling 0.38 0.52 Heating 0.38 0.52 External finish Galvanized steel plate Dimension Height 615 (690) Width...
  • Page 10 [ III Specifications ] Model name PFFY- PFFY- PFFY- WL20VEM-A WL25VEM-A WL32VEM-A Power source ~ 220-240V 50Hz/60Hz Cooling capacity Heating capacity Power consumption Cooling 0.021 0.029 0.036 Heating 0.021 0.029 0.036 Current Cooling 0.26 0.34 Heating 0.26 0.34 External finish Galvanized steel plate, MUNSELL (1.0Y 9.2/0.2) / ABS, MUNSELL (5.32GY 8.75/0.37) Dimension...
  • Page 11 [ III Specifications ] Model name PFFY- PFFY- WL40VEM-A WL50VEM-A Power source ~ 220-240V 50Hz/60Hz Cooling capacity Heating capacity Power consumption Cooling 0.037 0.064 Heating 0.037 0.064 Current Cooling 0.39 0.68 Heating 0.39 0.68 External finish Galvanized steel plate, MUNSELL (1.0Y 9.2/0.2) / ABS, MUNSELL (5.32GY 8.75/0.37) Dimension...
  • Page 12 [ III Specifications ] 2. Electrical component specifications Component Sym- PFFY-WL20VCM-A PFFY-WL25VCM-A PFFY-WL32VCM-A PFFY-WL20VEM-A PFFY-WL25VEM-A PFFY-WL32VEM-A Room temperature TH21 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ thermistor Water inlet pipe TH22 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ thermistor Water outlet pipe TH23 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ...
  • Page 13 [ IV Outlines and Dimensions ] [1] Outlines and Dimensions IV Outlines and Dimensions 1. PFFY-WL20, 25, 32, 40, 50VCM-A Bottom suction · wall mounting Unit: mm - 8 - HWE22200...
  • Page 14 [ IV Outlines and Dimensions ] Unit: mm - 9 - HWE22200...
  • Page 15 [ IV Outlines and Dimensions ] 2. PFFY-WL20, 25, 32, 40, 50VCM-A Bottom suction · floor mounting Unit: mm - 10 - HWE22200...
  • Page 16 [ IV Outlines and Dimensions ] Unit: mm - 11 - HWE22200...
  • Page 17 [ IV Outlines and Dimensions ] 3. PFFY-WL20, 25, 32, 40, 50VEM-A wall mounting Unit: mm - 12 - HWE22200...
  • Page 18 [ IV Outlines and Dimensions ] Unit: mm - 13 - HWE22200...
  • Page 19 [ IV Outlines and Dimensions ] 4. PFFY-WL20, 25, 32, 40, 50VEM-A floor mounting Unit: mm - 14 - HWE22200...
  • Page 20 [ IV Outlines and Dimensions ] Unit: mm - 15 - HWE22200...
  • Page 21 [ V Wiring Diagram ] [1] Wiring Diagram V Wiring Diagram 1. PFFY-WL20, 25, 32, 40, 50VCM-A - 16 - HWE22200...
  • Page 22 [ V Wiring Diagram ] 2. PFFY-WL20, 25, 32, 40, 50VEM-A - 17 - HWE22200...
  • Page 23 [ VI Water System Diagram ] [1] Water System Diagram VI Water System Diagram Water outlet thermistor TH23 Water outlet Water inlet Connections Water inlet thermistor TH22 Heat exchanger (G) Manual air purge valve Room temperature thermistor TH21 PFFY-WL20, 25, 32, 40, 50VCM-A PFFY-WL20, 25, 32, 40, 50VEM-A Inlet mm O.D.
  • Page 24 [ VII Troubleshooting ] [1] Troubleshooting VII Troubleshooting 1. Check methods 1. Component and check points (1) Thermistor Room temperature thermistor (TH21) Water inlet thermistor (TH22) Water outlet thermistor (TH23) Disconnect the connector and measure the resistance between terminals with a tester. (Ambient temperature 10°C - 30°C) Normal Abnormal...
  • Page 25 [ VII Troubleshooting ] 1) Summary of flow control valve (FCV) operation The FCV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. The FCV position changes in response to the pulse signal. Indoor control board and FCV connection Limit signal (Opening...
  • Page 26 [ VII Troubleshooting ] 2) FCV operation Close Open Fully open valve (85 pulses) Fully close valve (770 pulses) No. of pulses Valve opening degree (4) Pressure sensor (with the valve kit) *Optional part Pressure sensor (inner water) PS1 Pressure sensor (outlet water) PS2 1) Check that the pressure sensor is connected.
  • Page 27 [ VII 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 (CNMF1). Do not unplug the connector CNMF1 with the unit energized to avoid damage to the indoor control board and fan motor. 2.
  • Page 28 [ VII Troubleshooting ] 3. Setting of address switch Make sure that power source is turning off. Indoor unit control board Incase using network remote controller, address is set by rotary switches. (SW11,SW12) It is not necessary setting address in case of using unit remote controller. Indoor unit do not run without address setting in field.
  • Page 29 [ VII Troubleshooting ] 4. Voltage test points on the control board 1. PFFY-WL20, 25, 32, 40, 50VCM-A, PFFY-WL20, 25, 32, 40, 50VEM-A Fuse (AC 250V 6.3A) Power supply voltage (220 - 240VAC) CN2M For M-NET transmission cable connection (24 - 30VDC) Emergency operation Capacity setting Function setting...
  • Page 30 [ VII Troubleshooting ] 5. Setting of Dip-switch (at delivery) Models SW21 SW22 SWE PFFY- WL20VCM-A 9 10 9 10 PFFY- WL25VCM-A 9 10 9 10 PFFY- WL32VCM-A 9 10 9 10 PFFY- WL40VCM-A 9 10 9 10 PFFY- WL50VCM-A 9 10 9 10 Models...
  • Page 31 [ VII Troubleshooting ] 6. 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 Remote display Thermo-ON signal Fan output Fan speed...
  • Page 32 [ VII Troubleshooting ] 7. Selecting the external static pressure (PFFY-WL20, 25, 32, 40, 50VCM-A only) Four levels of external static pressure (0 Pa/10 Pa/40 Pa/60 Pa) are available for selection. Set the setting either by using the switches on the control board (SW21-1, SW21-2, and SW21-5) or from the function selection screen on the remote controller.
  • Page 33 [ VII Troubleshooting ] 8. Setting addresses (Be sure to operate with the main power turned OFF.) There are two types of rotary switch setting available: setting addresses 1 to 9 and over 10, and setting branch numbers. 1) How to set addresses Example: If Address is “3”, remain SW12 (for over 10) at “0”, and match SW11 (for 1 to 9) with “3”.
  • Page 34 [ VII Troubleshooting ] 11.Instructions for debris removal operation Details are described in the "Instructions for debris removal operation" section in the "Troubleshooting" chapter of the Service Handbook for the HBC or hydro unit. Refer to the figure below for the position of the air vent valve on the indoor unit. (A) Air vent valve 12.Instructions for the air vent operation Details are described in the "Instructions for the air vent operation"...
  • Page 35 [ VIII Disassembly Procedure ] [1] Disassembly Procedure VIII Disassembly Procedure 1. Panel (PFFY-WL20, 25, 32, 40, 50VEM-A only) The unit needs to be disassembled before installation, piping work, and electrical work. Be careful removing heavy parts. 1. Open the right and left covers. (Fig.1) (A) Cover Fig.1 2.
  • Page 36 [ VIII Disassembly Procedure ] 2. Control box Be careful removing heavy parts. 1. Removing the control box cover (1) Remove the fixing screws (three) of the control box (A), Fixing screws and remove the cover. (Fig.7) *At this stage, the following servicing is possible. (Fig.8) 1) Operation and check of the switches (listed below) which are on the control board.
  • Page 37 [ VIII Disassembly Procedure ] 3. Thermistor (Intake air) Exercise caution when removing heavy parts. 1. Remove the control box cover with procedure [1]-2. 2. Remove the thermistor. (1) Pull out the thermistor holder (B) and thermistor (C) on the control box in Fig.9.
  • Page 38 [ VIII Disassembly Procedure ] 4. Drain pan Be careful removing heavy parts. 1. Remove the control box cover (A) with procedure [1]-2. 2. Remove the fixing screws on the front plate (D), (E) to re- move it. (Fig.10) Fig.10 3.
  • Page 39 [ VIII Disassembly Procedure ] 5. Thermistor (Water inlet / Water outlet temperature detection) Be careful removing heavy parts. 1. Removing the liquid pipe and gas pipe thermistor (1) Remove the front plate (E) with procedure [1]-4. (2) Remove the control box (F) with procedure [1]-4. (3) Pull out the drain pan with procedure [1]-4.
  • Page 40 [ VIII Disassembly Procedure ] 6. Fan and fan motor Be careful removing heavy parts. 1. Removing the filter, control box cover, front plate and control box (1) Push down the tab on the filter, and pull out the filter in the direction of the arrow 1 (Fig.16).
  • Page 41 [ VIII Disassembly Procedure ] 7. Bearing WL40, P50 models only. Be careful removing heavy parts. 1. Removing the bearing (1) Remove the two fixing screws on the bearing cover (M) to remove it. (Fig.20) Fig.20 (2) Remove the two bearing retainer screws to remove the bearing.
  • Page 42 [ VIII Disassembly Procedure ] 8. Heat exchanger Be careful removing heavy parts. 1. Removing the control box cover, front plate, control box and drain pan (1) Remove the control box cover (A) with procedure [1]-2. (2) Remove the front plate (D), (E) with procedure [1]-4. (3) Remove the control box (F) with procedure [1]-4.
  • Page 43 [ VIII Disassembly Procedure ] Note: In order to attach and fix the heat exchanger, insert the hook (a) on the heat exchanger (Fig.26) to (b) (Fig.27). Fig.26 Fig.27 - 38 - HWE22200...
  • Page 44 [ VIII Disassembly Procedure ] 9. Control box inside layout AC reactor Power source (PFFY-WL50VCM-A model only) terminal bed Transmission terminal bed - 39 - HWE22200...
  • Page 45 [ VIII Disassembly Procedure ] 10.Sensor position PFFY-WL20, 25VCM-A PFFY-WL32VCM-A PFFY-WL20, 25VEM-A PFFY-WL32VEM-A Water outlet sensor Water outlet sensor Water inlet sensor Water inlet sensor PFFY-WL40, 50VCM-A PFFY-WL40, 50VEM-A Water outlet sensor Water inlet sensor - 40 - HWE22200...
  • Page 47 Related Links Model Number: PFFY-WL50VCM-A PFFY-WL20- 50VCM_Installation_Manual_(VG79F070H02) PFFY-WL20-50VCM_Instruction_Book_(VG79F075H01) PFFY-WL20-50VCM_Parts_List_(BWE023050) PFFY-WL20- 50VCM__Service_Manual_(VG79F070H02) PFFY-WL20-50VEM_Instruction_Book_(VG79F075H01) PFFY-WL20-50VEM__Service_Manual_(HWE22200)

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