SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS December 2012 TECHNICAL & SERVICE MANUAL No. OCH442 REVISED EDITION-B R410A Indoor unit [Model names] PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E [Service Ref.] PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P32VHM-ER2 PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P40VHM-ER2 PKFY-P50VHM-E PKFY-P50VHM-ER1 PKFY-P50VHM-ER2 Revision: • PKFY-P32/40/50VHM-ER2 have been added in REVISED EDITION-B. • Some descriptions have been modified. • Plase void OCH442 REVISED EDITION-A.
1 TECHNICAL CHANGES PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 PKFY-P50VHM-ER1 PKFY-P32VHM-ER2 PKFY-P40VHM-ER2 PKFY-P50VHM-ER2 1. INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up) PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 PKFY-P50VHM-ER1 1. INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up) 2. Fan speed has been changed. (4 speed → 3 speed) 3. Heat exchanger has been changed. PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E Service parts of room temp.
2 SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Do not use the existing refrigerant piping. The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant deterioration of the new unit. Use “low residual oil piping” If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricant will result.
[1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant. [2] Additional refrigerant charge When charging directly from cylinder · Check that cylinder for R410A on the market is syphon type.
3 PART NAMES AND FUNCTIONS 3-1. Indoor unit Filter Air intake Louver Vane Air outlet 3-2. Wireless remote controller CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display Blinks when model is selected. SET TEMP. display indicates the set desired temperature. CLOCK display display Displays the current time.
3-3. WIRED REMOTE CONTROLLER Wired remote controller function * The functions which can be used are restricted according to the model.
The main display can be displayed in two different modes: "Full" and "Basic". The factory setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting. * All icons are displayed for explanation. Fri Fri Cool Room Cool Set temp. Mode Temp. Set temp. Auto Auto Mode Fan Temp. Fan Operation mode Indoor unit operation mode appears here. Appears when the buttons are locked. Preset temperature Preset temperature appears here.
Menu structure Main menu Press the MENU button. Move the cursor to the desired item with the F1 and F2 buttons, and press the SELECT button. Vane · Louver · Vent. (Lossnay) High power Timer On / Off timer Auto-Off timer Filter information Error information Weekly timer Energy saving Auto return Schedule Night setback Restriction Temp.
Main menu list Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from f ve different settings. Use to turn ON / OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation. • Select a desired setting from "Off," "Low," and "High." High power Use to reach the comfortable room temperature quickly. • Units can be operated in the High-power mode for up to 30 minutes.
Setting and display items Initial setting Display details Auto mode Setting details Make the settings for the remote controller related items as necessary. Clock: The factory settings are "Yes" and "24h" format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display. Whether or not to use the AUTO mode can be selected by using the button.
3-4. WIRED REMOTE CONTROLLER “Sensor” indication Display Section For purposes of this explanation, all parts of the display are shown. During actual operation, only the relevant items will be lit. Identifies the current operation Displayed when the remote controller sensor is used. Day-of-Week Shows the current day of the week. Time/Timer Display “Locked” indicator Shows the current time, unless the simple or Auto Off timer is set.
4 SPECIFICATION 4-1. Specif cations Service Ref. PKFY-P32VHM-E Power source Cooling capacity (Nominal) *1 *1 *1 *2 Power input Current input Heating capacity (Nominal ) *3 *3 *3 Power input Current input External finish External dimension H × W × D Net weight Heat exchanger Fan Type × Quantity External static press. Motor type Motor output Driving mechanism Airflow rate (Low-Mid2-Mid1-High) 3.6 3,100 12,300 3,150 0.03 0.30 4.0 3,400 13,600 0.03 0.
PKFY-P32VHM-ER1 PKFY-P32VHM-ER2 Service Ref. Power source Cooling capacity (Nominal) *1 *1 *1 *2 Power input *4 Current input *4 Heating capacity (Nominal ) *3 *3 *3 Power input Current input External finish External dimension H × W × D Net weight Heat exchanger Fan Type × Quantity External static press. Motor type Motor output Driving mechanism Airflow rate (Low-Mid-High) kW kcal/h Btu/h kcal/h kW A kW kcal/h Btu/h kW A 9 - 10 - 11 150 - 167 - 183 318 - 353 - 388 9 - 10.
4-2. Electrical parts specif cations Service Ref. Parts name PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P32VHM-ER2 Symbol PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P40VHM-ER2 PKFY-P50VHM-E PKFY-P50VHM-ER1 PKFY-P50VHM-ER2 Room temperature thermistor TH21 Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.0k Liquid pipe thermistor TH22 Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.0k Gas pipe thermistor TH23 TH24 Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.
0 16 28.5 41 78.5 91 103.5 116 166 178.5 203.5 232.5 253.5 77-:5.1 Tapping screw hole 43 394 A 56 4-:9 Bolt hole 238 213 12.5 225 200 174 C Knockout hole for piping 449 56 Min.7 250mm or greater with optional drain pump installation. 372.3 356.3 327.5 43 46 56 6 291.5 265 278.3 69 125 46 60 43 B D Mount board Knockout hole for left piping Left side :65~:80 Knockout hole for lower piping 273.2 231.5 128.5 153.5 21.8 0 20 32.7 53.
WIRING DIAGRAM PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-E PKFY-P40VHM-ER1 NAME NAME SYMBOL INDOOR CONTROLLER BOARD TH21 THERMISTOR ROOM TEMP. DETECTION (0°C/15kΩ, 25°C/5.4kΩ) CONNECTOR REMOTE SWITCH CENTRALLY CONTROL TH22 PIPE TEMP. DETECTION / LIQUID (0°C/15kΩ, 25°C/5.4kΩ) REMOTE INDICATION BUZZER TH23 PIPE TEMP. DETECTION / GAS1 (0°C/15kΩ, 25°C/5.4kΩ) SURGE ABSORBER FUSE (T3.15AL 250V) PIPE TEMP. DETECTION / GAS2 TH24 (0°C/15kΩ, 25°C/5.4kΩ) POWER SUPPLY (I.B) POWER SUPPLY (I.B) ADDRESS BOARD A.
PKFY-P32VHM-ER2 NAME NAME SYMBOL INDOOR CONTROLLER BOARD TH21 THERMISTOR ROOM TEMP. DETECTION (0°C/15kΩ, 25°C/5.4kΩ) CONNECTOR REMOTE SWITCH CENTRALLY CONTROL PIPE TEMP. DETECTION / LIQUID TH22 (0°C/15kΩ, 25°C/5.4kΩ) REMOTE INDICATION IT TERMINAL TH23 PIPE TEMP. DETECTION / GAS1 (0°C/15kΩ, 25°C/5.4kΩ) BUZZER FUSE (T3.15AL 250V) TH24 PIPE TEMP. DETECTION / GAS2 (0°C/15kΩ, 25°C/5.4kΩ) POWER SUPPLY (I.B) POWER SUPPLY (I.B) ADDRESS BOARD A.
7 REFRIGERANT SYSTEM DIAGRAM PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P32VHM-ER2 PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P40VHM-ER2 PKFY-P50VHM-E PKFY-P50VHM-ER1 PKFY-P50VHM-ER2 Gas pipe thermistor TH23 Strainer (#50mesh) Gas pipe Gas pipe thermistor TH24 Flare connection Liquid pipe thermistor TH22 Heat exchanger Liquid pipe Room temparature thermistor TH21 Linear expansion valve Strainer1 (#50mesh) Strainer2 (#100mesh) Strainer (#100mesh) Unit : mm (inch) Item 8 Service Ref.
8-1-1. Thermistor Thermistor for lower temperature < Thermistor for lower temperature > 0: 10: 20: 25: 30: 40: 1 273+t 40 Resistance (K ) Thermistor R0=15k" ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 50 Room temperature thermistor (TH21) Liquid pipe temperature thermistor (TH22) Gas pipe temperature thermistor (TH23) (TH24) 1 )} 273 15k" 9.6k" 6.3k" 5.4k" 4.3k" 3.0k" 30 20 10 0 -20 -10 0 10 20 30 Temperature ( ) 40 50 8-1-2.
8-1-3. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) Self check Symptom : The indoor fan cannot turn around.
8-2.
CDE AB Rotary switch Before power supply ON 90 1 Address board SW14 789 CDE AB F01 789 • To operate each indoor unit by each remote controller when installed 2 indoor units or more are near, Pair No. setting is necessary. Pair No. setting is available with the 4 patterns (Setting patterns A to D). . Make setting for J41, J42 of indoor controller board and the Pair No. of wireless remote controller. • You may not set it when operating it by one remote controller.
8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 PKFY-P32VHM-ER2 PKFY-P40VHM-ER2 CN2M Connect to the terminal block (TB5) (M-NET transmission connecting wire) 24-30VDC (non-polar) Power supply from outdoor unit PKFY-P50VHM-E PKFY-P50VHM-ER1 PKFY-P50VHM-ER2 CNMF Connect to the fan motor (MF) 1-3 : DC310~340V 4-3 : DC15V 5-3 : DC0~6V 6-3 : DC0 or DC15V CNP Drain pump output (DP) 1-3 : 220-240AC FUSE 3.
8-3-2. Wireless remote controller board PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 PKFY-P32VHM-ER2 PKFY-P40VHM-ER2 PKFY-P50VHM-E PKFY-P50VHM-ER1 PKFY-P50VHM-ER2 LD101 Connect to the indoor controller board (I.B) 8-3-3.
9 DISASSEMBLY PROCEDURE PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P32VHM-ER2 PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P40VHM-ER2 PKFY-P50VHM-E PKFY-P50VHM-ER1 PKFY-P50VHM-ER2 Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROM THE INSTALLATION PLATE Figure 1 (1) Remove the front panel. (2) Insert the screw driver to the corner hole at both left and right side as shown in the figure 1.
OPERATION PROCEDURE PHOTOS 3. REMOVING THE INDOOR CONTROLLER BOARD AND WIRELESS CONTROLLER BOARD (1) Remove the front panel. (Refer to procedure 2) (2) Remove the room temp. thermistor TH21. (See Photo 3) (3) Remove the electrical box covers (screw 4 × 12). (See Photo 3) (4) Disconnect the connectors on the indoor controller board. (5) Remove the switch board cover. (6) Pull out the indoor controller board toward you, then disconnect the rest of connectors.
OPERATION PROCEDURE PHOTOS 5. REMOVING THE NOZZLE ASSEMBLY (with VANE and VANE MOTOR) AND DRAIN HOSE Electrical box cover (side) Electrical box cover (top) Screw (side cover) Screw (top cover) Photo 7 (1) Remove the front panel (Refer to procedure 2). (2) Remove the electrical box cover. (See Photo 3) (3) Disconnect the vane motor connector (CN151) on the indoor controller board. (4) Remove the corner box. (5) Pull the nozzle assembly and detach. (6) Push the fixture and remove the drain hose.
OPERATION PROCEDURE PHOTOS 9. REMOVING THE HEAT EXCHANGER AND LEV (1) Remove the front panel (Refer to procedure 2) and the corner panel at right lower side. (2) Remove the electrical box (Refer to procedure 4) and the nozzle assembly (Refer to procedure 5). (3) Remove the motor band. (4) Remove the pipe thermistors (Refer to procedure 8). (5) Disconnect the connector (CN60) on the indoor controller board and the connector for ground wire.
TM HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC CORPORATION Distributed in Dec. 2012 No. OCH442 REVISED EDITION-B Distributed in Feb. 2009 No. OCH442 REVISED EDITION-A PDF 7 Distributed in Jul. 2008 No. OCH442 PDF 7 Made in Japan New publication, effective Dec. 2012 Specifications are subject to change without notice.
