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Samsung MH18AP1(P2)-09, Service Manual

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Samsung MH18AP1(P2)-09 Service Manual Download Page 50

No

No

Yes

Yes

Yes

Yes

Yes

Troubleshooting

49

Samsung Electronics

Yes

Yes

No

No

No

No

No

6-3-9 When the compressor does not operate

1. Checklist :

1) Is the COMP A under the operating conditions? (cooling operating of A, B(C) room)

2) Is the power voltage normal? (the rating voltage ±10% range)

3) Are the connector connection of COMP A(RY72, 73) and B(RY71) good?

4) The COMP A(B) is operated on and off in accordance with the operating conditions of indoor unit of A(B, C) room. 

2. Troubleshooting procedure

✳

Comp A (B) operating conditions

(1) Comp A : Comp on /off control in accordance with the A room during the heating and cooling indoor unit operation 

(2) Comp B : Comp on /off control in accordance with the B(C) room during the heating and cooling  indoor unit operation

✳

Comp A(B) power measuring terminal

(1) Comp A measuring ; RY73 (4) 

↔

RY72 (4)

(2) Comp B measuring ; RY71 (4) 

↔

RY72 (4)

(3) Power input ; RY72 (3) 

↔

RY73(3)

*Refer to the power measuring terminal

RED

BLK

RY73

RY71

BLK

RED

WHT

RY72

(3)

(4)

(3)

(4)

(3)

(4)

Keep Comp A (B) off

Normal

Defect of comp A (B) and running condenser 

→

Replace

Defect of RY72, 73 (Comp B) and 

RY71(comp A) contact and coil 

→

Replace

Defect of IC06 output

→

Replace

Defect of IC04 (micom)   

→

Replace

Normal (comp A (B) off) 

Apply the outdoor power and operate the indoor unit A(B.,C) 

in the cooling mode.

Normal

(comp A (B) off)

Has 3 minutes passed COMP A(B) after the power initial and

COMP on/off

Is comp A (B) on?

Is the voltage of pin #14, 13(15) at low

(DC 0.7V)?

Is the voltage of pin #50, 51(52) of IC04 (micom) at 

high (DC 5V)?

Is comp A (B) under the operating condition?

Is the voltage (the rating voltage ±10% range) shown across the

terminal of Comp A(B) power applied?

Is the comp A under the operating condition?  

  DB98_16045A(4)_1  1/29/04 4:57 PM  Page 49

Summary of Contents for MH18AP1(P2)-09

Page 1: ...P2 X MH26AP1 P2 X SERVICE Manual CONTENTS AIR CONDITIONER 11 Product Specifications 12 Operating Instructions Technical Document 13 Disassembly and Reassembly 14 Refrigerating Cycle Diagram 15 Set Up the Model Option 16 Troubleshooting 17 Exploded Views and Parts List 18 PCB Diagram 19 Wiring Diagram 10 Schematic Diagram MULTI AIR CONDITIONER ...

Page 2: ...G MULTI SPLIT 2 65 2 78 2 65 2 78 5 30 5 56 1 1 1 1 39 39 57 57 1 220 240V 50 1 020 980 1 020 980 1 940 1 900 4 5 4 4 4 5 4 4 8 6 8 4 30 795 x 258 x 179 880 x 638 x 310 31 x 10 x 7 35 x 25 x 12 7 5 59 5 ø6 35 x 7 5 ø9 52 x 7 5 ø17 ROTARY G4A097JU1EP 35 35 INDUCTION MOTOR 925 925 CROSS FAN PROPELLER RESIN STEEL 30 100 2ROW 10STEP 2ROW 28STEP A B UNIT CAPILLARY TUBE A UNIT 770g B UNIT 770g 20 A B UN...

Page 3: ...0 1 280 2 560 2 560 5 7 5 7 5 7 5 7 11 4 11 4 35 890 x 285 x 179 1 000 x 790 x 310 35 x 11 x 7 39 x 31 x 12 8 5 69 ø6 35 x 7 5 ø9 52 x 7 5 ø17 ROTARY G8C124JU1EL 35 35 INDUCTION MOTOR 1 060 1 060 CROSS FAN PROPELLER RESIN STEEL 30 150 2ROW 12STEP 2ROW 36STEP A B UNIT CAPILLARY TUBE A UNIT 1 000g B UNIT 1 000g 16 A B UNIT RAC12128 9622 ISO R5151 STANDARD Size Power Perfor mance MH26AP1 P2 INDOOR UN...

Page 4: ...MEMO 3 Samsung Electronics ...

Page 5: ... by the pressing the temperature button On Off UP DOWN Low Medium High Automatic rotated Sleep button The sleep timer can be used when you are cooling or heating your room to switch the air conditioner off automatically after a period of 6 hours Turbo button The air conditioner cools or heats the room as quickly as possible After 30minutes the air conditioner is reset automatically to the previous...

Page 6: ...imes until the required time display FUNCTION OF KEY NAMED OF KEY No 8 9 10 11 On Timer button The On Timer enables you to switch on the air conditioner automatically after a given period of time that is from 30 minutes to 24 hours To set the operating time press the button one or more times until the required time display Timer Set Cancel button After setting On Timer or Off Timer press the butto...

Page 7: ...unction Low temperature release Prevention against freeze 5 TURBO MODE This mode is available in AUTO COOL HEAT DRY FAN MODE When this button is pressed at first the air conditioner is operated powerful state for 30 minutes regardless of the set temperature room temperature When this button is pressed again or when the operating time is 30 minutes turbo operation mode is canceled and returned to t...

Page 8: ...o switch off the air conditioner automatically after a given period of time You can set the period of time from 30 minutes to 24 hours 11 SELF DIAGNOSIS 12 BUZZER SOUND Whenever the On Off button is pressed or whenever change occurs to the condition which is set up or select the compulsory operation mode buzzer is sounded beep Indoor unit room temperature sensor error open or short OFF E1 OFF E2 O...

Page 9: ...B 2 2 Technical Document Pressure Graph 2 2 1 MH18AP1 P2 Cooling 7 5m Piping 20 27 2 26 5 31 6 30 4 38 8 38 5 25 30 Outdoor Temperature ßC High Pressure kgf cm 2 G 35 40 45 43 39 35 31 27 23 19 15 A unit B unit 25 2 25 2 25 2 28 8 28 8 28 8 20 25 30 Outdoor Temperature ßC Low Pressure kgf cm 2 G 35 40 45 9 8 9 6 9 4 9 2 9 8 8 8 6 8 4 8 2 8 8 2 8 2 8 3 9 4 A unit B unit 8 51 8 51 8 28 8 28 8 5 8 3 ...

Page 10: ...essure A unit B unit A unit B unit Indoor DB WB Cooing Outdoor DB 2 1 1 MH18AP1 P2 Cooling 15m Piping 20 25 30 Outdoor Temperature ßC 35 40 45 High Pressure kgf cm 2 G 43 39 35 31 27 23 19 15 27 8 26 8 32 3 31 3 38 2 37 9 A unit B unit 25 25 24 4 24 4 25 0 25 0 25 0 24 4 20 25 30 Outdoor Temperature ßC 35 40 45 Low Pressure kgf cm 2 G 9 8 8 8 6 8 4 8 2 8 7 8 8 0 8 0 8 0 8 4 8 8 8 8 8 2 8 0 A unit ...

Page 11: ...ng Outdoor DB Heating 7 5m Piping 15 10 5 Outdoor Temperature ßC 0 5 10 High Pressure kgf cm 2 G 29 5 27 5 25 5 23 5 21 5 19 5 17 5 15 5 13 5 11 5 23 8 28 6 20 2 A unit B unit 23 85 23 85 27 8 27 8 25 69 25 69 23 9 27 8 25 7 15 10 5 Outdoor Temperature ßC 0 5 10 Low Pressure kgf cm 2 G 7 5 7 6 5 6 5 5 5 4 5 4 3 5 3 6 0 6 8 A unit B unit 5 9 5 9 6 84 6 84 3 68 3 68 3 72 3 72 5 9 6 8 3 7 3 7 ...

Page 12: ...it Indoor DB WB Heating Outdoor DB Heating 15m Piping 15 10 5 Outdoor Temperature ßC 0 5 10 High Pressure kgf cm 2 G 31 5 29 5 27 5 25 5 23 5 21 5 19 5 17 5 15 5 13 5 11 5 29 0 25 7 19 6 27 4 23 8 A unit B unit 23 93 23 93 23 9 15 10 5 Outdoor Temperature ßC 0 5 10 Low Pressure kgf cm 2 G 7 6 5 6 5 5 5 4 5 4 3 5 3 3 5 3 4 A unit B unit 5 9 5 9 27 4 27 4 5 9 6 7 6 7 5 8 ...

Page 13: ... B unit A unit B unit Indoor DB WB Cooing Outdoor DB 2 2 2 MH19AP1 P2 Cooling 7 5m Piping 20 25 30 Outdoor Temperature ßC 35 40 45 High Pressure kgf cm 2 G 43 39 35 31 27 23 19 15 27 2 27 0 26 8 26 6 31 8 31 6 38 4 37 6 A unit B unit 20 25 30 Outdoor Temperature ßC 35 40 45 Low Pressure kgf cm 2 G 9 4 9 2 9 8 8 8 6 8 4 8 2 8 8 8 9 2 A unit B unit 8 5 8 5 8 5 8 5 8 3 8 3 8 3 8 3 8 9 8 9 9 3 9 3 8 5...

Page 14: ... Low Pressure A unit B unit A unit B unit Indoor DB WB Cooing Outdoor DB 2 1 1 MH18AP1 P2 Cooling 15m Piping 20 25 30 Outdoor Temperature ßC 35 40 45 High Pressure kgf cm 2 G 43 39 35 31 27 23 19 15 27 4 27 2 27 0 26 8 32 0 31 8 38 6 37 8 A unit B unit 20 25 30 Outdoor Temperature ßC 35 40 45 Low Pressure kgf cm 2 G 9 4 9 2 9 8 8 8 6 8 4 8 2 8 8 4 8 2 8 4 9 2 8 8 8 2 8 1 A unit B unit 8 7 8 7 8 7 ...

Page 15: ...ure Low Pressure A unit B unit A unit B unit Indoor DB WB Heating Outdoor DB Heating 7 5m Piping 15 10 5 Outdoor Temperature ßC 0 5 10 High Pressure kgf cm 2 G 35 32 29 26 23 20 27 5 22 7 33 1 27 7 A unit B unit 15 10 5 Outdoor Temperature ßC 0 5 10 Low Pressure kgf cm 2 G 7 6 5 6 5 5 5 4 5 4 3 5 3 3 5 6 8 6 7 3 4 A unit B unit ...

Page 16: ...e A unit B unit A unit 7 5m B unit 32 5m Indoor DB WB Heating Outdoor DB Heating 15m Piping 15 10 5 Outdoor Temperature ßC 0 5 10 High Pressure kgf cm 2 G 36 5 31 5 26 5 21 5 16 5 11 5 26 7 21 3 32 3 26 3 A unit B unit 15 10 5 Outdoor Temperature ßC 0 5 10 Low Pressure kgf cm 2 G 7 6 5 6 5 5 5 4 5 4 3 5 3 3 4 6 7 3 1 A unit B unit 6 4 6 4 6 4 ...

Page 17: ...A unit B unit A unit B unit Indoor DB WB Cooing Outdoor DB 2 2 3 MH24AP1 P2 Cooling 7 5m Piping 20 25 30 Outdoor Temperature ßC 35 40 45 High Pressure kgf cm 2 G 43 39 35 31 27 23 19 15 27 9 31 1 38 0 38 0 30 1 28 75 28 75 25 4 25 4 28 8 26 0 25 4 A unit B unit 20 25 30 Outdoor Temperature ßC 35 40 45 Low Pressure kgf cm 2 G 9 5 9 4 9 3 9 2 9 1 9 8 9 8 8 8 7 8 6 8 5 9 0 8 9 9 1 9 2 9 2 9 0 8 8 8 9...

Page 18: ...A unit B unit A unit B unit Indoor DB WB Cooing Outdoor DB 2 1 1 MH18AP1 P2 Cooling 15m Piping 20 25 30 Outdoor Temperature ßC 35 40 45 High Pressure kgf cm 2 G 39 35 31 27 23 19 15 27 8 26 9 29 1 37 3 26 0 A unit B unit 24 4 24 4 30 1 30 1 37 37 24 4 30 1 37 0 20 25 30 Outdoor Temperature ßC 35 40 45 Low Pressure kgf cm 2 G 9 5 9 4 9 3 9 2 9 1 9 8 9 8 8 8 7 8 6 8 5 8 8 8 7 8 7 8 6 8 9 8 8 9 0 A u...

Page 19: ...Heating Outdoor DB Heating 7 5m Piping 15 10 5 Outdoor Temperature ßC 0 5 10 High Pressure kgf cm 2 G 31 5 29 5 27 5 25 5 23 5 21 5 19 5 17 5 15 5 13 5 11 5 24 9 30 0 26 7 A unit B unit 20 61 20 61 28 4 28 4 24 8 24 8 20 6 28 4 24 8 15 10 5 Outdoor Temperature ßC 0 5 10 Low Pressure kgf cm 2 G 7 5 7 6 5 6 5 5 5 4 5 4 3 5 3 A unit B unit 6 0 7 0 3 7 6 85 6 85 3 7 3 7 5 9 5 9 6 9 3 7 5 9 ...

Page 20: ...unit B unit Indoor DB WB Heating Outdoor DB Heating 15m Piping 15 10 5 Outdoor Temperature ßC 0 5 10 High Pressure kgf cm 2 G 31 5 29 5 27 5 25 5 23 5 21 5 19 5 17 5 15 5 13 5 11 5 A unit B unit 19 6 29 0 25 7 27 4 23 8 23 91 23 91 23 9 15 10 5 Outdoor Temperature ßC 0 5 10 Low Pressure kgf cm 2 G 7 6 5 6 5 5 5 4 5 4 3 5 3 A unit B unit 3 5 3 5 5 9 6 8 5 8 6 7 ...

Page 21: ... unit Indoor DB WB Cooing Outdoor DB 2 2 4 MH26AP1 P2 Cooling 7 5m Piping High Pressure kgf cm 2 G 43 0 39 0 35 0 31 0 27 0 23 0 19 0 15 0 27 3 27 1 32 2 31 3 39 5 38 0 20 25 30 Outdoor Temperature ßC 35 40 45 A unit B unit 25 46 25 46 25 06 25 06 25 5 25 1 Low Pressure kgf cm 2 G 10 0 9 5 9 0 8 5 8 0 7 5 7 0 6 5 6 0 20 25 30 35 40 45 6 9 6 8 8 8 8 6 9 6 A unit B unit 9 31 9 31 9 3 6 64 6 64 6 6 6...

Page 22: ... Outdoor DB 2 1 1 MH18AP1 P2 Cooling 15m Piping High Pressure kgf cm 2 G 43 0 39 0 35 0 31 0 27 0 23 0 19 0 15 0 20 25 30 Outdoor Temperature ßC 35 40 45 39 5 28 1 38 0 A unit B unit 28 6 29 57 29 57 32 87 32 87 32 40 32 40 29 32 29 32 29 6 32 9 32 4 29 3 Low Pressure kgf cm 2 G 10 0 9 5 9 0 8 5 8 0 7 5 7 0 20 25 30 Outdoor Temperature ßC 35 40 45 A unit B unit 8 9 7 6 7 6 7 6 9 8 8 33 9 12 9 12 8...

Page 23: ...ressure A unit B unit A unit B unit Indoor DB WB Heating Outdoor DB Heating 7 5m Piping High Pressure kgf cm 2 G 29 27 25 23 21 19 12 7 2 Outdoor Temperature ßC 3 8 A unit B unit 19 3 20 0 24 8 24 7 28 0 27 2 High Pressure kgf cm 2 G 7 6 5 6 5 5 5 4 5 4 3 5 3 2 5 11 6 1 Outdoor Temperature ßC 4 9 A unit B unit 3 0 3 27 3 27 5 22 5 22 4 9 6 38 6 38 6 0 3 3 5 2 6 4 ...

Page 24: ... Pressure Low Pressure A unit B unit A unit B unit Indoor DB WB Heating Outdoor DB Heating 15m Piping High Pressure kgf cm 2 G 29 27 25 23 21 19 17 12 7 2 Outdoor Temperature ßC 3 8 A unit B unit 19 0 25 5 27 7 24 4 24 3 19 7 Low Pressure kgf cm 2 G 6 5 6 5 5 5 4 5 4 3 5 3 2 5 11 6 1 Outdoor Temperature ßC 4 9 A unit B unit 2 8 4 5 5 4 6 2 3 1 5 0 ...

Page 25: ...Detach tape of Front Panel upper 3 Slide the lower Front Grille down then disassemble it by pulling it forwards 4 Open the upper Front Grille by pulling right and left sides of the Grille 5 Take the left and right Filter out 6 Loosen one of the right screw and detach the Terminal Cover 7 Detach the thermistor from the Front Grille 8 Loosen 5 fixing screws of Front Grille 9 Pull the lower left and ...

Page 26: ... Panel Grille with the thumb to remove the hook And press the right of the upper side of the Panel Grille with the fingers And then disassemble the Panel Grille 1 Take all the connector of PCB upper side out Including Power Cord 2 Detach the outdoor unit connection wire from the Terminal Block 3 If pulling the main PCB up it will be taken out 1 Pull Tray Drain out from the Back Body ...

Page 27: ...de 2 Detach the Connection Pipe 3 Detach the Holder Pipe at the rear side 4 Loosen 3 fixing screws of right and left side 5 Detach the Heat Exchanger from the indoor unit 1 Loosen 2 fixing screws and detach the Motor Holder 2 Loosen 1 fixing screw of Fan Motor with a M3 wrench 3 Detach the Fan Motor from the Fan 4 Detach the Fan from the left Holder Bearing ...

Page 28: ...ch the Control Box Cover 4 Unplug the Ass y Cable 5 Detach the Cabinet Side 6 Detach the Cabinet Front When you assemble the parts check if the each parts and Component Electric Box are fixed firmly 1 Detach the Nut Flange Turn to the clockwise 2 Disassemble the Propeller Fan MH18AP1 P2 X MH19AP1 P2 X MH24AP1 P2 X MH26AP1 P2 X MH18AP1 P2 X MH19AP1 P2 X MH24AP1 P2 X MH26AP1 P2 X ...

Page 29: ...Samsung Electronics 28 4 Refrigerating Cycle Diagram 4 1 MH18AP1 P2 X 3 8 3 8 3 8 3 8 3 8 3 8 1 4 3 8 1 4 3 8 7 94mm sensor Comp A A Room B Room Comp B 7 94mm sensor sensor ID1 3 650L sensor ID1 3 650L ...

Page 30: ...29 Samsung Electronics 4 2 MH19AP1 P2 X 3 8 3 8 1 4 1 4 1 4 4 76 5 16 3 8 3 8 3 8 7 94mm 3 8 1 4 3 8 3 8 sensor A Room B Room Comp B Comp A 7 94mm sensor sensor sensor ID 1 3 800L ID 1 3 500L ID1 3 550L ...

Page 31: ...Samsung Electronics 30 4 3 MH24AP1 P2 X 3 8 3 8 3 8 7 94mm B Room Comp B Comp A 3 8 3 8 3 8 7 94mm sensor sensor sensor ID 1 3 550 ID1 3 650 1 4 3 8 A Room sensor 1 4 3 8 ...

Page 32: ...Comp B C ID1 3 650 ID1 3 500 A Room MH26AP2 12 B Room MH26AP2 07 C Room MH26AP2 07 Distributor Elec expansion valve Elec expansion valve 1 4 7 5m 3 8 7 5m 1 4 7 5m 3 8 7 5m 1 4 7 5m 3 8 7 5m ID1 5 700 Air ID1 3 650 sensor sensor sensor sensor sensor ...

Page 33: ... you push the button the display panel reads or repeatedly Setting is not required if you must a value which has a default Push the button to set the display panel to Every time you push the button the display panel reads repeatedly 3 Push the button to set the display panel to Every time you push the button the display panel reads repeatedly 4 Do not touch the button because its default is Unless...

Page 34: ...Press ON OFF key with the direction of remote controller for set 7 8 Press button then the default value is Push the button to set the display panel to Every time you push the button the display panel reads repeatedly 10 Push the button to set the display panel to Every time you push the button the display panel reads repeatedly 9 Do not touch the button because its default is Unless the display p...

Page 35: ...p the Model Option Table of the option code MODEL OPTION CODE MH18AP1 P2 09 MH19AP1 P2 07 MH19AP1 P2 12 MH24AP1 P2 12 MH26AP1 P2 07 MH26AP1 P2 12 024553 106340 023553 10620c 067503 106362 067533 106362 023753 10420c 067553 104351 ...

Page 36: ...intermittently in HEAT mode Indoor fan and outdoor fan stop operation intermittently in a HEAT mode The compressor stops intermittently in a COOL mode or DRY mode and fan speed of the indoor unit decreases Explanation In happens after a delay of 3 minutes when the compressor is reoperated The same phenomenon occurs when a power is on As a phenomenon that the compressor is reoperated after a delay ...

Page 37: ...any gas leakages Connection wiring Heat resistant insulation of the piping Drainage Earthing wire connection Correct operations follow the steps below Room select switch in the indoor unit 2 Apply the power to the outdoor unit Check the fuse 250V 5A The fuse is opened when the power line L N is short 6 2 Checking and Testing operations A unit A unit B unit C unit ON ON OFF OFF ON OFF OFF ON Room s...

Page 38: ...ckering check as follows A Check the display part of indoor unit of each unit A B after outdoor unit PCB switch S W A is on Check the status of each unit indoor room select switch Adjust the select switch suitable to the unit A B A unit B unit C unit B Check the communication connection of outdoor unit PCB Check whether the red LED of outdoor unit PCB is flickering The communication lamp is flicke...

Page 39: ...ber display C unit In case of triple split multi air conditioner High temperature of the A cond High temperature of the B cond Remark Display Explanation The error indicated on the PCB display of outdoor unit Be sure to check after applying the power to the outdoor unit Be sure to check during the test operation Display of power application Display 4 minutes after the COMP is on Normal operation U...

Page 40: ...error Remark Display Explanation The error indicated on the display panel of indoor unit When inputting MICOM over 4 9V and below 0 4V 15 seconds after the fan being operating below 450RPM Wrong data for 60 seconds In this case both indoor unit B and C remocon off and after 2 3 second remocon on ALL LAMP is flickering The pipes or the cables are wrong connected Check the temperature sensor of B co...

Page 41: ...isplayed Gd or Error displayed Er is displayed after 4 minutes Taking difference between the present temperature of indoor heat exchanger and the temperature 4 minutes later if the temperature difference is over 5 C the connection is good or if the temperature difference is below 5 C the connection is bad 2 If the result of the test operation is good operation is possible for 30 minutes max If the...

Page 42: ...the PCB module normal 5VDC Is voltage of 48 indoor fan of the micom normal Is rating voltage 10 range applied to the primary side of the BD71 Check linkage between power cord and terminal tap Check fuse Is 300V DC appear in the secondary side of BD71 Replace SMPS PARTS Yes No Yes No Yes Yes Yes No Yes Yes DC5V 10ms 10ms 250ns No OK Yes Yes Yes Yes No No Yes Normal Refer to remote control unit faul...

Page 43: ...es No Replace of Ass y display PCB Replace the main PCB of indoor unit No trouble normal Check of remote controller Normal Yes Yes No Yes No No Yes No Yes No Yes Apply the power Is the outdoor power connected normally Is the fuse F701 250V 3 15A of PCB open Is the output voltage of electrostatic voltage regulator IC KA7805 DC 4 5V 5 5V Is the operation icon lamp flickering with the sound of ting M...

Page 44: ...de of power side D101 D104 and KA7812 After watching the display of PCB board assemble the color and shape of housing correctly as follows Is the fuse open F701 Is the fuse F101 250V 2A blown out Check whether the output voltage of IC01 KA7812 is DC 12V Check whether the output voltage of IC02 KA7805 is DC 5V Insert the primary side of power transformer in the terminal GT01 and then is the voltage...

Page 45: ...the operation icon lamp flickering with the sound of ting MH26 Doesn t it flicker but come out the sound of ting Is the type of MICOM IC04 pin 48 old type 120Hz Error Error Code E3 occurs after the indoor unit fan motor is rotating for 15 seconds Yes Yes Yes No Yes Yes Yes No No No No No Yes Yes Is the pin 15 of IC07 ULN2003A the old type Is the pin 17 of MICOM the old type 120Hz If the power is n...

Page 46: ...eration is selected according to the temperature condition of outdoor room 2 When A room and B room are mixed to operate it is always under low operation 3 Perform the comp ON OFF control in the dry mode 4 When it is under the operation of anti freezing overload protection defrost operation it may be Low high or Off 5 Hi High speed Low Low speed Yes No No No No No No Yes Yes Yes Yes Yes Normal ope...

Page 47: ...efer to page 41 Normal Remove power cord and plug in again in approx 5 seconds Yes UP DOWN louver motor is faulty Is the operation icon lamp flickering with the sound of ting MH26 Doesn t it flicker but come out the sound of ting Does operation start when swing button of the remote control unit pushed No No Micom IC04 is faulty Voltage at pin 26 29 of micom IC04 change Squarewave Yes No Driver IC0...

Page 48: ... Operation by remote control unit is impossible Initial Diagnosis 1 Troubleshooting procedure No Yes Replace battery Voltage of battery less than 2 5V Remote Control Unit No No LCD is faulty LCD display status of REMOCON normal Yes No Replace button Transmission display lamp blinking when ON OFF button on the remote control unit pushed Yes No Micom is faulty Voltage at pin 30 of Remocon Micom chan...

Page 49: ...ating to cooling put the 4 Way valve off immediately in case of B and C room 4 The changeover of cooling to heating it is on after 170 seconds delay Yes No No No No Yes Yes Yes Yes Keep 4 Way valve off Normal Defect of RY76 RY77 contact and coil Replace the Relay Defect of IC06 IC07 output Replace Defect of IC04 MICOM replace the IC04 or PCB ass y Put off the outdoor unit power and put it on again...

Page 50: ...ndoor unit operation Comp A B power measuring terminal 1 Comp A measuring RY73 4 RY72 4 2 Comp B measuring RY71 4 RY72 4 3 Power input RY72 3 RY73 3 Refer to the power measuring terminal RED BLK RY73 RY71 BLK RED WHT RY72 3 4 3 4 3 4 Keep Comp A B off Normal Defect of comp A B and running condenser Replace Defect of RY72 73 Comp B and RY71 comp A contact and coil Replace Defect of IC06 output Repl...

Page 51: ...ts substrate So if a circuit board is roughly handled such lead wires and parts will be easily broken or damaged by bending or shock 5 When soldering the lead wires of any new part be sure to polish them using an emery paper or the like before soldering them Since the lead wires of any new part are covered with an oxide film solder cannot adhere to the lead wires if not polished 6 When soldering a...

Page 52: ...age at OUT and GND of IC02 5VDC 5 DC voltage at Q201 Base and GND change 5 squarewave Voltage check 1 Voltage of relay RY71 72 73 coil Voltage at pin 13 14 15 of IC07 12VDC 2 Voltage at RY72 No and RY71 No RY72 No and RY73 No the rating voltage 10 range 1 Compressor does not operate 1 Voltage at both ends of CN72 above 180V 2 Indoor unit fan motor does not operate Voltage over Indoor unit fan moto...

Page 53: ...15 6 2 11 5 1 1 1 2 1 1 3 1 1 4 1 1 5 1 1 6 15 1 4 1 3 1 2 1 1 1 1 1 3 3 1 7 10 7 2 7 3 7 1 8 9 13 14 12 You can search for the updated part code number through the ITSELF URL http itself sec samsung co kr 7 Exploded Views and Parts List 7 1 Indoor Unit ...

Page 54: ...5 DB63 00588A COVER TERMINAL HIPS 1 DB63 00581A COVER TERMINAL HIPS 1 6 DB93 02531P ASS Y REMOCON ASS Y 1 1 7 DB94 00486A ASS Y BACK BODY SUB ASS Y 1 DB94 00488A ASS Y BACK BODY SUB ASS Y 1 7 1 DB61 01119A BODY BACK HIPS 1 DB94 00488A BODY BACK HIPS 1 7 2 DB63 00580A COVER IONIZER HIPS 1 1 7 3 DB94 00258A ASS Y BEARING ASS Y 1 1 8 DB94 00040F ASS Y CROSS FAN ASS Y 1 DB94 00040R ASS Y CROSS FAN ASS...

Page 55: ...Samsung Electronics 54 7 2 Outdoor Unit MH18AP1 P2 X MH19AP1 P2 X 1 7 7 1 9 14 4 5 3 12 7 2 7 3 13 8 8 1 8 7 7 4 7 5 6 2 10 11 11 1 11 5 ...

Page 56: ...S Y VALVE 4WAY B ASS Y 1 8 DB93 02609A ASS Y CONTROL OUT ASS Y 1 DB93 02610A ASS Y CONTROL OUT ASS Y 1 8 1 DB61 00891A CASE CONTROL OUT SGCC M T0 8 1 1 8 2 DB61 00585A CASE PCB OUT ABS T2 5 1 1 8 3 2501 001237 C OIL 35µF 450V 2 1 8 4 2501 001238 C OIL 30µF 450V 1 8 5 DB65 40072A TERMINAL BLOCK 8P 1 1 8 6 2301 001370 C FILM 2 5µF 450VAC 1 1 8 7 DB93 02252D ASS Y PCB MAIN ASS Y 1 1 9 DB94 00180A ASS...

Page 57: ...Exploded Views and Parts List Samsung Electronics 56 MH24AP1 P2 X 10 2 3 5 5 1 5 2 7 4 9 4 7 5 7 7 1 1 1 1 7 2 6 7 3 8 8 1 8 6 13 12 11 11 1 11 5 ...

Page 58: ...3 DB99 00442A ASS Y VALVE 4WAY B ASS Y 1 7 4 DB99 00443A ASS Y TUBE CAPILLARY A ASS Y 1 7 5 DB99 00444A ASS Y TUBE CAPILLARY B ASS Y 1 8 DB93 02639A ASS Y CONTROL OUT ASS Y 1 8 1 DB61 00584A CASE CONTROL OUT SGCC M T0 8 1 8 2 DB61 00585A CASE PCB OUT ABS T2 5 1 8 3 2501 001237 C OIL 35µF 450V 2 8 4 DB65 40072A TERMINAL BLOCK 8P 1 8 5 2301 001379 C FILM 4µF 450VAC 1 8 6 DB93 02252D ASS Y PCB MAIN A...

Page 59: ...ews and Parts List Samsung Electronics 58 MH26AP1 P2 X 10 8 2 12 8 6 8 7 3 8 3 8 4 8 1 14 7 9 8 5 2 4 5 1 5 5 2 7 1 13 1 1 1 6 11 6 11 5 11 11 2 11 3 11 4 11 1 7 4 7 2 7 2 1 7 2 2 7 5 7 5 1 7 5 2 7 3 7 3 1 7 3 2 8 ...

Page 60: ...00451A ASS Y TUBE CAPILLARY A ASS Y 1 7 5 DB99 00450A ASS Y TUBE EXPANSION VALVE ASS Y 1 7 5 1 DB62 02075A COIL EXPANSION PACIFIC 2 7 5 2 DB62 02074A BODY EXPANSION PACIFIC 2 8 DB93 02646A ASS Y CONTROL OUT ASS Y 1 8 1 DB61 00584A CASE CONTROL OUT SGCC M T0 8 1 8 2 DB65 00064A CLIP CAPICITOR ABS T2 5 1 8 3 2501 001237 C OIL 35µF 450V 2 8 4 DB65 40072C TERMINAL BLOCK 8P 1 8 5 2301 001379 C OIL 4µF ...

Page 61: ...Samsung Electronics 60 7 3 Ass y Control In Indoor Unit MH18AP1 P2 09 MH19AP1 P2 07 DB93 02567A MH19AP1 P2 12 MH24AP1 P2 12 DB93 02568A MH26AP1 P2 07 DB93 02567B MH26AP1 P2 12 DB93 02568B ...

Page 62: ...0171A HOLDER WIRE CRAMP HIPS 1 1 8 DB32 00020A ASS Y THERMISTOR ASS Y 1 1 9 6001 000929 SCREW MACHINE PH M3xL22 1 1 10 6001 000725 SCREW MACHINE TH M4xL16 2 2 11 DB93 01380B C W MODULE ASS Y 1 DB93 01380A C W MODULE ASS Y 1 12 DB39 00643M C W STEP MOTOR UP DOWN ASS Y 1 DB39 00643F C W STEP MOTOR UP DOWN ASS Y 1 13 DB62 01368X SEAL 61x40x3 30FOAM PE GRAY 1 1 14 SCREW MACHINE PH M4X10 15 DB39 00780B...

Page 63: ...Samsung Electronics 62 8 PCB Diagram 8 1 MAIN PCB Indoor Unit TOP ...

Page 64: ...63 Samsung Electronics PCB Diagram BOTTOM ...

Page 65: ... IC05 IC EEPROM 93LC56 128x16Bit SOP 8P 150MIL 2 5V 1 IC03 IC VOLTAGE COMP 7533 TO 92 3P SINGLE PLASTIC 1 IC02 IC POSI ADJUST REG 78L05A TO 92 3P PLASTIC 4 6 1 IC01 IC PWM CONTROLLER 266 DIP 8P 300MIL PLASTIC 0 3 7 1 NTC1 THERMISTOR NTC 22ohm 1 4A 3100K 9 5MW C 7 0 1 VA71 VARISTOR 560V 2500A 17 5x7 5mm TP 1 R701 R706 R METAL OXIDE S 100Kohm 5 2W AA TP 4x12mm 2 R704 R CEMENT 5 1Kohm 5 5W BK 12 7x10...

Page 66: ...11 5 1 C102 C AL 15uF 20 450V GP TP 12 5x20mm 5 1 X301 RESONATOR CERAMIC 10MHZ 0 5 BK 8x3x5 5mm 1 BZ61 BUZZER PIEZO 85DB 2KHZ 1 SW01 SWITCH DIP 24V 300mA SLIDE 1 SS71 SSR 12Vdc 2A 1mS 1mS 1 F701_1 FUSE CARTRIDGE 250V 3 15A TIME LAG GLASS 5x20mm 1 F702 FUSE RADIAL LEAD 250V 1A TIME LAG 8 5x8mm 1 F701 FUSE BLOCK 500V 100M 1 CN71 CONNECTOR HEADER 1WALL 3P 1R 7 92mm STRAIGHT SN BL 1 CN72 CONNECTOR HEA...

Page 67: ...Samsung Electronics 66 18K 19K 24K 8 2 MAIN PCB Outdoor Unit ...

Page 68: ...PCB Diagram 67 Samsung Electronics 26K ...

Page 69: ... IC VOLT REGU IC RESET IC MCU IC DRIVE PHOTO COUPLER DIODE RECT DIODE SWITCHING ZENNER DIODE LED DISPLAY HOLDER SEVEN LED LAMP FILTER NOISE PERSONATOR CERAMIC TRANSISTOR TRANSISTOR SWITCH TACT FST 250V 3 15A FST250V 2A FH 51H 7 5A RD 1 8 TP 331 J RD 1 4 TP 103 J RD 1 8 TP 102 J RD 2W TP 562 J RD 1 4 TP 472 J RD 1 8 TP 103 J RD 1 4 TP 470 J RD 1 4 TP 123 J RD 1 8 TP 621 J RD 1 2 TP 471 J RD 1 8 TP ...

Page 70: ...CONNECTOR WAFER CONNECTOR WAFER CONNECTOR WAFER CONNECTOR WAFER CONNECTOR WAFER CONNECTOR WAFER CONNECTOR WAFER CONNECTOR TERMINAL SCREW PH HEATSI PH PCB OUT INR14D 471K MP362MA P10 6 T 50mm G4A 1A JQ1a 12V YW396 03AV BLU SMW250 06 WHT SMW250 03 RED YW396 05AV WHT YW396 03AV BLK YW396 03AV WHT YW396 03AV RED YW250 14 WHT YW250 05 WHT YW250 05 BLU GP88191 2 M3 G FeFzY AL H25 FR 1 2 1 22 3 4 1 1 1 1...

Page 71: ...PLAY PCB DB93 01368G Parts List No 1 ASS Y LED MODULE 1 SNA 2 PCB DISPLAY FR 1 T1 6 1 SNA 3 TACT SWITCH KPT 1105A 1 SNA 4 RESISTOR 200ohm 2W 2 SNA 5 RESISTOR 100ohm 2W 3 SNA 6 CONNECTOR WIRE 14P 1 SNA Specification Description Remark Q TY ...

Page 72: ... T1 6 1 SNA 2 CONNECTOR HEADER BOX 3P 1R 2mm ANGLE SN 1 SNA 3 C CERAMIC MLC AXIAL 1nF 10 50V Y5P TP 1 9 x 3 5 1 SNA 4 DIODE SWITCHING 1N4148 100V 200mA DO 35 TP 1 SNA 5 C CERAMIC MLC AXIAL 100nF 80 20 50V Y5V TP 3 5 x 1 1 SNA 6 MODULE FRP4021H7 1 SNA Specification Description Remark Q TY ...

Page 73: ...MEMO Samsung Electronics 72 ...

Page 74: ...73 Samsung Electronics 9 Wiring Diagram 9 1 Indoor Unit This Document can not be used without Samsung s authorization Code No DB98 15806A ...

Page 75: ...Samsung Electronics 74 This Document can not be used without Samsung s authorization 9 2 Outdoor Unit MH18AP1 P2 X MH19AP1 P2 X MH24AP1 P2 X Code No DB68 20814A ...

Page 76: ...75 Samsung Electronics Wiring Diagram This Document can not be used without Samsung s authorization MH26AP1 P2 X Code No DB68 01437A ...

Page 77: ...MEMO Samsung Electronics 76 ...

Page 78: ...77 Samsung Electronics 10 Schematic Diagram 10 1 Indoor Unit This Document can not be used without Samsung s authorization ...

Page 79: ...Samsung Electronics 78 This Document can not be used without Samsung s authorization 10 2 Outdoor Unit MH18AP1 P2 X MH19AP1 P2 X MH24AP1 P2 X ...

Page 80: ...79 Samsung Electronics Schematic Diagram This Document can not be used without Samsung s authorization MH26AP1 P2 X ...

Page 81: ...MEMO Samsung Electronics 80 ...

Page 82: ...e Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law Samsung Electronics Co Ltd Feb 2004 Printed in Korea Code No DB98 16045A 4 ...

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