SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS November 2011 No. OCH418 REVISED EDITION-B TECHNICAL & SERVICE MANUAL R410A Indoor unit [Model names] PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E R407C [Service Ref.] PKFY-P15VBM-E PKFY-P15VBM-ER2 PKFY-P20VBM-E PKFY-P20VBM-ER1 PKFY-P20VBM-ER2 PKFY-P25VBM-E PKFY-P25VBM-ER1 PKFY-P25VBM-ER2 R22 Revision: • PKFY-P15/20/25VBM-ER2 have been added in REVISED EDITION-B. • Some descriptions have been modified. • Please void OCH418 REVISED EDITION-A.
1 TECHNICAL CHANGES PKFY-P15VBM-E PKFY-P15VBM-ER2 PKFY-P20VBM-ER1 PKFY-P20VBM-ER2 PKFY-P25VBM-ER1 PKFY-P25VBM-ER2 HEAT EXCHANGER and WATER CUT have been changed. PKFY-P20VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-E PKFY-P25VBM-ER1 INDOOR CONTROLLER BOARD (I.B.) has been changed. 2 SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R407C Do not use the existing refrigerant piping. Use liquid refrigerant to charge the system.
[1] Cautions for service ·After recovering the all refrigerant in the unit, proceed to working. ·Do not release refrigerant in the air. ·After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [2] Refrigerant recharging (1) Refrigerant recharging process 1 Direct charging from the cylinder. ·R407C cylinder available on the market has a syphon pipe. ·Leave the syphon pipe cylinder standing and recharge it.
Cautions for units utilizing refrigerant R410A Do not use the existing refrigerant piping. Use a vacuum pump with a reverse flow check valve. 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. Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc. Use “low residual oil piping” If there is a large amount of residual oil (hydraulic oil, etc.
[1] Cautions for service (1) Perform service after collecting the refrigerant left in the 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 Indoor unit Air intake Filter Grille Vane Louver Air outlet OCH418B 6
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. Displays 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. If the simple or Auto Off timer is set, the time to be switched off is shown.
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 Blinks when model is selected. display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display SET TEMP. display indicates the set desired temperature. CLOCK display display Displays the current time. OPERATION MODE display Operation mode display indicates which operation mode is in effect.
4 SPECIFICATION 4-1. SPECIFICATIONS PKFY-P15VBM-E PKFY-P15VBM-ER2 Service ref. 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 x W x D Net weight Heat exchanger Fan Type x Quantity External static press. Motor type Motor output Driving mechanism Airflow rate (Low-Mid2-Mid1-High) kW kcal/h Btu/h kcal/h kW A kW kcal/h Btu/h kW A 1.7 1,450 5,800 1,500 0.04 0.20 1.
4-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. Symbol Parts name PKFY-P20VBM-E PKFY-P20VBM-ER1 PKFY-P20VBM-ER2 PKFY-P15VBM-E PKFY-P15VBM-ER2 PKFY-P25VBM-E PKFY-P25VBM-ER1 PKFY-P25VBM-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 Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.
3 24.4 54 R1 5 295 5 R1 R8 45 Knockout hole for under piping Knockout hole of remote controller wiring Knockout hole for left piping 45 16 R8 10 50 91.5 2.5 10 R8 34 Knockout hole of right piping Knockout hole for remocon wiring 520 Liquid pipe 450 Gas pipe 660 (Drain pipe total 760) 695 Air outlet 640 Air intake 640 Air intake 815 16 116 110 N The first side L The second side M1 Terminal block Detailed 3 106.7 115 M2 60 100.
6 WIRING DIAGRAM PKFY-P20, 25VBM-E Symbol MV LEV TB2 TB5 TH21 Symbol Name Vane motor SW5 Linear expansion valve SW11 SW12 Terminal Power supply block Transmission SW14 Thermistor Room temp.detection W.B (0 /15k ,25 /5.4k ) RU Pipe temp.detection/liquid BZ TH22 (0 /15k ,25 /5.4k ) LED1 Pipe temp.detection/Gas LED2 TH23 (0 /15k ,25 /5.4k ) SW1 Address board A.B SW2 Mode selection SW1 Switch 6 1 SW5 240V SW1 (RED) 4 ADDRESS CN43 1 CN51 5 1 CN52 SW12 0 SW11 0 10ths DIGIT 1s DIGIT BRANDH No.
PKFY-P15VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 Symbol MV LEV TB2 TB5 TH21 Symbol Name Vane motor SW5 Linear expansion valve SW11 SW12 Terminal Power supply block Transmission SW14 Thermistor Room temp.detection W.B (0 /15k ,25 /5.4k ) RU Pipe temp.detection/Liquid BZ TH22 (0 /15k ,25 /5.4k ) LED1 Pipe temp.detection/Gas LED2 TH23 (0 /15k ,25 /5.4k ) SW1 Address board A.
7 REFRIGERANT SYSTEM DIAGRAM PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 Gas pipe temperature thermistor TH23 Gas pipe Strainer (#100mesh) Liquid pipe temperature thermistor TH22 Strainer (#100mesh) Heat exchanger Room temperature thermistor TH21 Service ref. Item Gas pipe Liquid pipe 8 Liquid pipe Linear expansion valve Strainer (#100mesh) Unit: mm(inch) PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 {12.7 (1/2”) {6.35 (1/4”) TROUBLESHOOTING 8-1.
Thermistor for lower temperature < Thermistor for lower temperature > 50 Room temperature thermistor (TH21) Liquid pipe temperature thermistor (TH22) Gas pipe temperature thermistor (TH23) 40 Rt=15exp { 3480( 1 273+t 0: 15k' 10: 9.6k' 20: 6.3k' 25: 5.4k' 30: 4.3k' 40: 3.
8-2.
1 Remarks Address board How to set address Example : If address is "3", remain SW12 (for over 10) at "0", and match SW11 (for 1 to 9) with "3". SW12 SW11 90 1 90 1 45 6 45 6 Address board Before power supply ON SW14 F01 45 6 CDE AB 23 How to set branch number SW14 (Series R2 only). Match the indoor unit’s refrigerant pipe with the BC contoller’s end connection number Remain other than series R2 at "0".
8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 CN60 Linear expansion valve output (LEV) CN5V Vane motor output (MV) CN81 Connected to the address board (CN82) CN90 Connected to the wireless remote controller board (W.B) CN29 Pipe temperature thermistor/Gas (TH23) CN21 Pipe temperature thermistor/Liquid (TH22) CN42 Connected to the address board (CN43) CN3A Connected to the MA-Remote controller Between 1 to 3 8.
8-3-2. Indoor power board PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 FAN Fan motor output (MF) CN2M Connected to the terminal block (TB5) (M-NET transmission connecting wire) 24-30V DC (non-polar) FUSE 6.3A 250V CN35P Connected to the indoor controller board (CN35M) CN53P Connected to the indoor controller board (CN53M) Between 1 to 2 24-30V DC (non-polat) Between 3 to 5 12.5-13.7V DC (Pin3 (+)) Between 4 to 5 11.5-12.
8-3-2. Indoor power board PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 CND Power supply for indoor controller board Between 1 to 3 208/230V AC FAN Fan motor output (MF) CN2M Connected to the terminal block (TB5) (M-NET transmission connecting wire) 24-30V DC (non-polar) FUSE 6A 250V CN35P Connected to the indoor controller board (CN35M) CN53P Connected to the indoor controller board (CN53M) Between 1 to 2 24-30V DC (non-polar) Between 3 to 5 12.5-13.
9 DISASSEMBLY PROCEDURE PKFY-P15VBM-E PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1) 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 When there is removing plate (1) Remove the corner box at right lower side of the indoor unit and remove the removing plate from the corner box. (Figure 3) (2) Insert the removing plate at the back side of the corner box to remove the indoor unit.
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 3. REMOVING THE INDOOR CONTROLLER BOARD AND INDOOR POWER BOARD Electrical box cover Photo 2 (1) Remove the front panel. (Refer to 2) (2) Remove the electrical box cover (screw 4 × 10). (Refer to the Photo 2) INDOOR CONTROLLER BOARD (1) Disconnect the following connectors on the indoor controller board.
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 5. REMOVING THE NOZZLE ASSEMBLY AND DRAIN HOSE Photo 5 (1) Remove the front panel (Refer to 2). (2) Remove the electrical box cover. (3) Disconnect the connector (CN5V) on the indoor controller board. (4) After unhook the right side of the corner box, press the upper left side and remove the corner box. (5) Remove the nozzle assembly from the fixture. (See the Photo 5) (6) Remove the drain hose. Heat exchanger Drain hose Nozzle assembly Fixture 6.
PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-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 When there is removing plate (1) Remove the corner box at right lower side of the indoor unit and remove the removing plate from the corner box. (See the Figure 3) (2) Insert the removing plate at the back side of the corner box to remove the indoor unit.
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 3. REMOVING THE INDOOR CONTROLLER BOARD AND INDOOR POWER BOARD Photo 2 Electrical box cover (1) Remove the front panel. (Refer to procedure 2) (2) Remove the electrical box cover (screw 4 × 10). (See the Photo 2) INDOOR CONTROLLER BOARD (1) Disconnect the following connectors on the indoor controller board.
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 6. REMOVING THE ELECTRICAL BOX Photo 6 (1) Remove the front panel. (Refer to procedure 2) (2) Remove the electrical box cover. (See the Photo 2) (3) Remove the water cut. (See the Photo 3) (4) Pull the nozzle assembly toward you as opening the catch of the nozzle assembly. (See the Photo 4) (5) Disconnect the indoor/outdoor transmission wiring of TB5. (6) Disconnect the power supply wiring of TB2. (7) Disconnect the relay connector of MA-remote controller.
OPERATION PROCEDURE 8. REMOVING THE VANE MOTOR (1) Remove the front panel. (Refer to procedure 2) (2) Remove the screw of the electrical parts box cover, and remove the cover. (3) Remove the 2 screws of the vane motor. Disconnect the relay connector and remove the motor from the shaft. (4) Disconnect the vane motor connector (CN5V) on the indoor controller board. PHOTOS & ILLUSTRATIONS Photo 10 Heat exchanger Vane motor fixing screws Vane motor 9.
