Page 1 PACKAGED AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT KFH28PV2 KRH28PV2 Manual SERVICE AIR CONDITIONER CONTENTS P re c a u t i o n s P r oduct Specifications Operating Instructions and I n s t a l l a t i o n...
Page 2: Precaution
1. Precautions 1) Turn off the the power. Be sure to turn off the power before attempting to repair the Turn off the sub power switch separately installed. unit such as the disassembly of the unit. 2) Be careful of electric shock When checking the circuit with the power connected in unavoidable circumstances, take special care not to touch the live parts.
Page 3: P R Oduct Specifications
2. Product Specifications 2-1 Table M o d e l KFH28PV2 I t e m U n i t Width x Height x Depth 500 x 1835 x 330 Indoor unit S i z e P a c k e d...
Page 4 2-2 Dimensions unit : mm Indoor Unit Outdoor Unit...
Page 5: Operating Instructions And
3. Operating Instructions and Installation 3-1 Operating Instructions 3-1-1 Control System Char t Operation Main switch operation Auto, Cool, Dry, Fan, Heat operation Remote control operation Turbo, Mild, Auto, Cool, Dry, Fan, Heat, Timer operation In this mode, operation mode(COOL, HEAT) is selected automatically by room Auto mode Operation selector mode temperature of initial operation...
Page 6 Operating Instructions and Installation VFD display function Selection of operation mode Auto, Cool, Dry, Fan Heat Display Selection of fan speed Auto, natural, high, medium, and low fan speed Display Temperature display Current temperature Fan speed diagram Turbo, high, medium, and low airflow Display Timer function Timer Display Convenience function...
Page 7 Operating Instructions and Installation 3-1-2 Main Controller Function 3-1-2(a) Auto Operation 1. In this mode, operation mode(COOL, HEAT) is selected automatically by the room temperature of initial operation. Room Temp. Operation Type Tr ≥ 21˚C + ∆T Cool operation (Set Temp.:24˚C + ∆T) Tr <...
Page 8: Operating Condition
Operating Instructions and Installation 3-1-2(d) Turbo Operation turbo fan speed(high speed) set fan speed set fan speed Indoor fan speed Compressor control opertion mode of (note)area (note) Time,(t) start of turbo end of turbo operation operation Operating condition 1. The turbo operation is available only in auto, cool, mild and heat mode. 2.
Page 9 Operating Instructions and Installation 3-1-2(f) Dry Operation Room temperature[˚C] A - MODE Ts+4 A - MODE B - MODE Ts+3 B - MODE Ts+2 C - MODE Ts+1 C - MODE Temperature down Temperature up Ts = d e s i red temperature 1.
Page 10 Operating Instructions and Installation 3-1-3 Key Types and Functions 3-1-3(a) Panel Key Types and Functions KEY NAME KEY OPERATING FUNCTION KEY TYPE Start and end of operation TACT ON/OFF - ON one time = operation start, ON again = operation end - No continued operation Change of the operation mode TACT...
Page 11 Operating Instructions and Installation 3-1-3(b) V.F. Display Operating Spec OPERATING SPEC DISPLA Y • When the compressor is activated (outdoor power relay on) : ON • When the compressor is stopped (outdoor power relay off) :OFF OPERATING • During the defrost operation : ON •...
Page 12 3-2 Installationn 3-2-1 Selection of Installation Place 3-2-1(a) Indoor Unit • Install the unit at a place close to the wall facing the outside as it is Top view necessary to perform piping connection with the outdoor unit. - It is effective to install the unit at a window side to ensure uniform distribution of indoor temperature .
Page 13 Operating Instructions and Installation 3-2-2 Electrical Work The electrical work should be performed by a specialist qualified for the work. • Use the single phase power supply, and be sure to install the sub power distributing board for exclusive use with the unit(separately purchased by the user). •...
Page 14 Operating Instructions and Installation 3-2-3 Installation Method 3-2-3(a) Indoor Unit This unit is greater in height compared to its width, and thus it may fall down. T h e re f o re, be sure to fix the unit to the wall and floor surfaces securely to prevent the unit fro m falling down.
Page 15 Operating Instructions and Installation 3-2-3(c) Installation Procedures Open the inlet grille, and remove the flare nut. 2 . Bend the connection pipe to an appropriate length using the spring bender depending upon the installation place. - Allowable pipe length : Maximum 25m - Allowable pipe drop distance : Maximum 15m - Make no more than ten bending points on the pipe •...
Page 16 Operating Instructions and Installation 3-2-3(d) Connection of refrigerant pipe Flare Processing 1 . Cut the pipe using the pipe cutter. Oblique Roughness Burr 2. Insert the flare nut into the pipe, and then perform the flare pro c e s s i n g . Outer Diameter ø...
Page 17 Operating Instructions and Installation 3-2-3(e) Drilling a Hole in the Wall • Drill a hole of 60mm in diameter to the outside. ø60mm • The drilling should be done at a distance of less than Less than 150mm from the floor facing the indoor unit. 150mm 3-2-3(f) Drain Hosel •...
Page 18 Operating Instructions and Installation 3-2-3(h) Air Purge • The air in the indoor unit and in the pipe must be purged. If air remains in the refrigeration pipes, it will affect the compre s s o r, reduce to cooling capacity and could lead to a malfunction. Use Vacuum Pump as shown at the figure .
Page 19 Operating Instructions and Installation 3-2-3(i) Refrigerant Refill Air purge(at the time of new installation only) Close the gas pipe side valve by turning it clockwise. Connect the pressure gauge to the low pressure side service valve, and then open the gas pipe side valve again. Connect it to the refrigerant filling tank.
Page 20 Operating Instructions and Installation 3-2-4 Check and Test Operation 3-2-4(a) Check • Be sure to check the following again after completion of installation. 1. Check the piping connection area for any gas leakage. Outdoor Indoor connection area connection area 2. Is the drain hose properly connected? 3.
Page 21 Operating Instructions and Installation 3-2-4(b) Test Operation • After checking, read the owner’s instructions care f u l l y, and perform a test operation. Then deliver the unit to the customer. (When delivering the unit, be sure to read carefully and follow the contents of the owner ’ s i n s t ru c t i o n s .
Page 22: Disassembly And Reassembly
4. Disassembly and Reassembly Stop operation of the air conditioner and remove the power before repairing the unit. 4-1 Indoor Unit Parts Procedur e Remark Front Grille 1) Packaged air conditioner indoor unit. 2) Open the inlet grille, and remove the connector ring.
Page 23 Disassembly and Reassembly Parts Procedur e Remark 5) To remove the Deco Low, remove the right and left side two screws, and then seper- ate the wire connector. 6) Remove the four screws, and remove the cover top. Then seperate the connector wire...
Page 24 Disassembly and Reassembly Parts Procedur e Remark 7) Remove the six screws, and pull the upward cover top PCB. 8) Loosen the right and left side two screws, and then push the upward cover front. 9) Remove the five screws,and then remove the seven screws on the Duct up.
Page 25 Disassembly and Reassembly Parts Procedur e Remark 10) Loosen one bolt to remove the blower. 11) Loosen the five locking screws, and remove the lower duct on the front side. Remove the left and right side two screws, and the upper side two screws. And then seperate the shutter body...
Page 26 Disassembly and Reassembly Parts Procedur e Remark...
Page 27 4-2 Outdoor Unit Parts Procedur e Remark 1) Loosen the seven screws on the cover top, and remove the cover top. 2) Loosen the two screws on the cover control, and remove the cover control. 3) Loosen the six screws in the side cabinet, and remove the side cabinet.
Page 28: Troubleshooting
5. Troubleshooting Troubleshooting pro c e d u re s • Items to be checked first. • Check the corrective actions in the case of occurrence of self-diagnosis mode. • When the trouble is not related to the 1st or 2nd items above, check the troubled area in detail in accordance with the fault analysis method by symptom.
Page 29 5-3 Fault Analysis by Symptom 5-3-1 No Power (No display) 1) Checkpoints Is the voltage of the power source normal ? Is the power line in good contact ? Check the power fuse (F701, F702) and PCB fuse (F101) for open. 4 A re the primary and secondary sides of the power-trans in good contact with the connector? Is the output voltage of IC08 (KA7812)normal ? (DC 11.5V~DC 12.5V) Is the output voltage of IC09 (KA7805)normal ? (DC 4.5V~DC 5.5V)
Page 30 Troubleshooting 5-3-2 When the Indoor Fan Motor does not Operate. 1) Checkpoints Is the voltage of the power source normal? Is the indoor fan connector (CN71) in good contact? Is the starting condenser of the fan motor in good contact with the terminal? Is the resistance at both ends of the relay (RY71 ~ RY74) coil approximately 720Ω? 2) Checking Pro c e d u res <After checking the checkpoints of clause 1)>...
Page 31 Troubleshooting 5-3-3 When the Compressor Does not Operate 1) Checkpoints Is the voltage of power source normal? Is the desired temperature set at a higher level than the current temperature at the time of "COOL" operation? Is the desired temperature set a lower(or equal) level than the current temperature at the time of "HEAT"...
Page 32 Troubleshooting 5-3-4 When the Panel Shutter does not Operate("E2" Er ror Mode) 1) Checkpoints Is the voltage of the power source normal? Is the door-motor connector (CN72) in good contact? Is the shutter sensor PCB in good contact with the main PCB connector (CN61)? Is the resistance value of both ends of the relay RY79, RY80 approximately 400Ω? 2) Checking Pro c e d u re s At the time of operation(Panel shutter open)
Page 33 Troubleshooting Operation Stop (panel shutter closed) P ress the ON/OFF button. Is the set in normal operating condition after the panel Then the panel shutter motor is normal. shutter is closed? Is the resistance value of both ends of the relay (RY79) Then check and replace the relay.
Page 34 Troubleshooting 5-3-5 When the remote control does not operate 1) Checkpoint The set sounds "beep" when it receives the signal of the remote contro l . 2) Checking Pro c e d u re s Turn off the power, and then turn it on in five seconds. Does the operation start when pressing the Refer to the checkpoint when ON/OFF button on the panel ?
Page 35: Exploded Views And Parts List
6. Exploded Views and Parts List 6-1 Indoor Unit...
Page 36 Y1-PROJECT, - DB63-10438A COVER-JOINT ABS, T2.5, BLK, -, - DB90-40150C ASS'Y-COVER FRONT APH180YD, AUTO DB90-40140C ASS'Y-COVER LOW KFH28PV2, LOGO DB90-40101C ASS'Y-COVER TOP PCB DB90-40100C ASS'Y-COVER TOP DB26-10079A TRANS-POWER 13.6, 230, 50, -, -, 16.7, 1.2, -, - DB93-10532B ASS'Y-PCB SUB...
Page 37 Exploded Views and Parts List 6-1-1 ASS’Y COVER FRONT...
Page 38 Exploded Views and Parts List Parts List Q’TY Description Specification CODE NO KFH28PV2 • DB90-40150C ASS’Y COVER FRONT ASS’Y KFH28PV2 DB63-10390C COVER FRONT ABS, PEARL COATING DB64-50121C KNOB MAIN ABS, GRAY DB67-60027B SPRING KNOB COIL, SPS6 DB64-50120B KNOB SHUTTLE ABS, GRAY...
Page 39 Exploded Views and Parts List 6-1-2 ASS’Y GRILLE INLET...
Page 40 Exploded Views and Parts List Parts List CODE NO Description Specification Remark Q’TY DB64-10141A GRILLE INLET ABS, PEARL COATING DB61-40212B HOLDER REMOCON DB92-10312A ASS’Y BRKT GRILLE L SECC-P DB92-10313A ASS’Y BRKT GRILLE L SECC-P DB33-10014A MAGNET MAGNET...
Page 41 6-2 Outdoor unit 19-1 19-2...
Page 42 DB90-00060A ASSY-CONTROL BOX OUT KFH28PV2 14-5 DB95-90026D ASSY-SPARK KILLER DB61-20093A BASE-MOTOR DB67-50067A FAN-PROPELLER DB31-10123A ASSY-MOTOR OUT ASS’Y DB61-30276A BRACKET-HOLDER SGCC-M, Z, T0.8, -, -, - DB96-30242A ASSY-COND KFH28PV2, 2X30 19-1 DB96-50130A ASSY-COLLECT OUT UP KFH28PV2 19-2 DB96-50129A ASSY-COLLECTOR LOW KFH28PV2...
Page 43 Exploded Views and Parts List 6-3 Remote Control Parts List(Remocon) CODE NO Description Specification Remark Q’TY DB93-00183A ASS'Y REMOCON KFH28PV2 DB61-10011A CASE-REMOCON(LW) DB73-20025A RUBBER-BUTTON(B) DB93-10171A ASS'Y PCB REMOCON FR-1 T1.6 DB07-20034A DB73-20009G RUBBER-BUTTON(A) DB61-10020A CASE-REMOCON(UPP) DB64-20035A DOOR-REMOCON DB64-40007B WINDOR-REMOCON DB74-10008A...
Page 44: Block Diagrams
7. Block Diagrams 7-1 Micro Computer Block Diagram Receiver module Compressor KEY Scan Remote Indoor fan motor Cotroller RESET Circuit Panel shutter Oscillation Circuit motor Load circuit Outdoor fan motor Room temperature 4-way valve sensor Indoor EVAP. t e m p e r a t u re sensor Panel shutter Power circuit sensor...
Page 45: Indoor Unit
7-2 Refrigerating Cycle Block Diagram INDOOR UNIT OUTDOOR UNIT Allowavle pipe length:Maximum 15m Allowable pipe drop distance:Maximum 10m Check valve 3-way valve Liquid side Capillary tube Capillary tube Heat Heat exchanger exchanger (Evaporator) (Condenser) Gas side 3-way valve 4-way valve Cooling Heating Compressor...
Page 46: Pcb Diagrams
8. PCB Diagrams 8-1 Ass’y Main PCB (CODE NO : DB93-10531B)
Page 47 PCB Diagrams •PART LIST DESCRIPTION CODE NO SPECIFICATION Q’TY LOCATION NO VF-DISPLAY SVR-05LL03 VFD1 MODULE REMOCON DB32-50025A GP1U281R HOLDER-VFD DB61-40208A NYLON66 VFD1 SW-TACT DE34-20032A KPT-1115D 6X4.3MM SW2, SW3 SW-JOG SHUTTLE DB34-90076A SRGPTJ DIODE-SW 0401-000005 1N4148 D901, D903-D914 DIODE-RECT 0402-000559 1N4002 100V 1A SI D915 DIODE-ZENER A4106-0154...
Page 48 8-2 Ass’y Power PCB(Code No : DB93-10532B)
Page 49 PCB Diagrams •PART LIST DESCRIPTION CODE NO SPECIFICATION Q’TY LOCATION NO SCREW-TAPPING DB60-10100A PH 3 L6 AB FEFZY IC08 HEAT SINK DB62-30031A AL6063 16.8 * 23.5*30 IC08 SPARK-KILLER DE47-30019A ESQ-1201 SK71 R-CARBON 2001-000042 RD 1/4 T 102-J R604, 605 R-CARBON 2001-000036 RD 1/4 TP 331-J R607...
Page 50 8-3 Ass’y Remote Control PCB(Ass’y Code No : DB93-10171A) •Parts side •Copper-clad side CODE NO Description Specification Q’TY Remark R501-R507,R514 CHIP RESISTOR MCR18EZH F 60.4K R515 CHIP RESISTOR MCR18EZH F 120K R508-R513 CHIP RESISTOR MCR18EZH F 30KF R601,R602 CHIP RESISTOR MCR18EZH J 2.0 R517 CHIP RESISTOR...
Page 51: Wiring Diagrams
9. Wiring Diagrams 9-1 Indoor Unit...
Page 52 9-2 Outdoor Unit...
Page 53 U P D A TE LOG SHEET Application date Page Part# Note(Cause & Solution) S/Bulletin# Use this page to keep any special servicing information. (Service Bulletin, etc.) If only parts number changes, Just change parts number directly on parts list. And if you need more information, please see the service bulletin Copyright Tr a d e m a r k s...
Page 54: Schematic Diagrams
10. Schematic Diagrams 10-1 Indoor Unit 10-1...
Page 55 10-2 Remote Control 10-2...

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