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Models
Indoor Units MW18Y3H MW18Y3H
Outdoor Units
MR18Y3H MR24Y3H
Service and Parts Manual
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CUSTOMER SATISFACTION and QUALITY ASSURANCE Friedrich is a conscientious manufacturer, concerned about customer satisfaction, product quality, and controlling warranty costs. As an Authorized Service Provider you play a vital role in these areas. By adhering to the policies and procedures you provide us with vital information on each warranty repair you complete. This information is used to identify product failure trends, initiate corrective action, and improve product quality, thereby furt
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SPECIFICATIONS ELECTRICAL DATA TYPE Cool & heat inverter INDOOR UNIT MW18Y3H MW24Y3H OUTDOOR UNIT MR18Y3H MR24Y3H COOLING CAPACITY 18,000 BTU/h 5.28 kW 22,000 BTU/h 6.50 kW HEATING CAPACITY 21,600 BTU/h 6.30 kW 27,600 BTU/h 8.10 kW POWER SOURCE 208 V / 230 V 208 V / 230 V FREQUENCY 60 Hz 60 Hz 6.3 A 7.9 A Cooling RUNNING CURRENT Heating 8.0 A 10.5 A Cooling 1.38 kW 1.76 kW INPUT WATTS Heating 1.80 kW 2.38 kW E.E.R. Cooling 13.0 BTU/kW 3.83 kW/kW 12.5 BTU/kW 3.69 kW/kW COP Heating 12.0 BTU/kW 3.5
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DIMENSIONS INDOOR UNIT Unit : inch (mm) 12-5/8" (320) 39-1/4" (998) 9" (228) Drain pipe diameter Inside : 5/8 inch (16 mm) Outside : 1-3/32 inch (28 mm) Liquid pipe diameter : 3/8 inch (9.52 mm) Gas pipe diameter : 5/8 inch (15.88 mm) 3
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OUTDOOR UNIT Unit : inch (mm) 1/2" 13" (330) (12) 35-1/2" (900) 3"(77) 1-1/4" (31) 15-3/4" (400) Air Flow 25-5/8" (650) 5-3/4" (147) 6-3/4" (170) 4 32-3/4" (830) 14-5/8" (370) 7/8" (21) 3/8" (9) 3-7/8" 17-3/8" (440) (99) 7-3/4" (196)
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REFRIGERANT SYSTEM DIAGRAM Heat exchanger ( INDOOR ) 3-Way valve (Large) 3-Way valve Muffler (Small) Pressure Strainer switch Expansion valve 4-Way valve Heat exchanger Strainer ( OUTDOOR ) Cooling flow Heating flow Refrigerant pipe diameter Liquid : 3/8" (9.52 mm) Gas : 5/8" (15.88 mm) 5 Compressor Sub-accumulator
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6 CIRCUIT DIAGRAM MW18Y3H / MR18Y3H INDOOR UNIT OUTDOOR UNIT TEST HIGH PRESSURE SWITCH RED 2 2 1 2 3 4 5 CN90 RED 1 1 CN13 BLUE EX OUT 2 1 1 THERMISTOR ( COMPRESSOR TEMP. ) YELLOW ( OPTION ) BROWN 1 2 2 3 3 WHITE 3 3 CN64 2 2 BLACK CN42 CN40 CN200 CN400 BROWN 3 4 4 FM FAN MOTOR 1 1 EX IN 2 5 5 1 2 3 4 5 1 2 3 4 5 6 7 8 9 1 2 1 2 3 4 THERMISTOR ( OUTDOOR TEMP. ) ( OPTION ) RED 1 6 6 BLUE 4 1 2 3 4 5 1 2 3 4 5 6 7 8 9 1 2 1 2 3 3 3 2 2 CN62 BLUE BLUE THERMISTOR ( PIPE TEMP. ) 1 1 6 6 PINK THERMIST
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7 MW24Y3H / MR24Y3H OUTDOOR UNIT INDOOR UNIT TEST HIGH PRESSURE SWITCH RED 2 2 1 2 3 4 5 RED CN90 1 1 BLUE CN13 EX OUT 2 1 1 THERMISTOR ( COMPRESSOR TEMP. ) YELLOW ( OPTION ) BROWN 1 2 2 WHITE 3 3 3 3 2 CN64 2 BLACK CN42 CN40 CN200 CN400 BROWN 3 4 4 FM FAN MOTOR 1 1 EX IN 2 5 5 1 2 3 4 5 1 2 3 4 5 6 7 8 9 1 2 1 2 3 4 THERMISTOR ( OUTDOOR TEMP. ) ( OPTION ) RED BLUE 1 6 6 1 2 3 4 5 1 2 3 4 5 6 7 8 9 1 2 1 2 3 4 3 3 CN62 2 2 BLUE THERMISTOR ( PIPE TEMP. ) BLUE 1 1 6 6 PINK THERMISTOR ( PIPE TEMP.
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INDOOR PCB CIRCUIT DIAGRAM CONTROL UNIT MW18Y3H : EZ-0090HHSE MW24Y3H : EZ-0090KHSE TERMINAL BOARD N THERMAL 1 FUSE 102 L 2 OUTDOOR UNIT SERIAL 3 EARTH EARTH TERMINAL INDICATOR PCB ASSEMBLY K05CY-0902HSE-D0 W5 TM2 TM1 TM4 GREEN 22007 22007 22007 RED WHITE BLACK CONTROLLER PCB ASSEMBLY MW18Y3H : K08CX-0903HSE-C1 MW24Y3H : K08CX-0904HSE-C1 CN6-1 RED CN6-2 WHITE WIRED REMOTE CONTROL UNIT CN6-3 BLACK CN11 CN201 B07B-PASK JB20-07HG CN2 1 CN11-1 RED 1 LOUVER ( RIGHT / LEFT ) SJH20-05WS 2 CN11-2 WHITE
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9 T1 340V MY064 D7 D9 UD7G-TB D1FL20U 6 5 D12 D2FL20U 12V W5 4 D10 D1FL20U R79, R81 - R84 5V 3 8 I C 2 6 20V F1 10k <1/10W> x 5 9 C6 + R45 C32 2 G K - L V 3 0 1 1 E 4 T1-12 FSL 3.15A C4 1 10 100/ 100k 0.01 R67 47pF/ 250V I C26-14 I C26-10 420V 150 TH1 1kV ( EM ) AUTO RESTART / PULAG ON <1/10W> JM5 18 14 10 5 4 3 2 1 5D2-10-LCS 1 SL I C1-76 R106 D8 C35 ROOM TEMPERARURE 8 7 6 5 4 3 2 1 R48 5V C38 R53 JM6 CORRECTION - 1 K1-4 R64 1.0k 2 3 1SS355 0.01 I C1-42 200k VA6 I C26-10 0.1 5.6k
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INDOOR UNIT INDICATOR PCB ASSEMBLY K05CY-0902HSE-D0 5V 5V CN201 07 JB20 / PAP 1061 L=230 D201 SLR-325MC 1 GREEN 2 3 D202 SLR-325DC 4 ORANGE 5 C201 6 0.1 GREEN 7 D203 SLR-325MC 5V I C201 R201 GP1UM261RKVF 47 VCC 2 <1/4W> OUT 1 GND 3 + C202 47/ 10V 10
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11 OUTDOOR PCB CIRCUIT DIAGRAM INVERTER ASSEMBLY MR18Y3H : EZ-009SHUE POWER SUPPLY PCB ASSEMBLY TRANSISTOR PCB ASSEMBLY MR24Y3H : EZ-009THUE MR18Y3H : K09DH-0904HUE-FL0 ( I. P. M. ) EMI FILTER ZCAT2132-1130 MR24Y3H : K09DH-0900HUE-FL0 MR18Y3H : K07BT-0905HUE-TR0 1 T UL1015 MR24Y3H : K07BT-0906HUE-TR0 AWG14 WHITE EMI FILTER N UL1015 UL1015 POWER SOURCE W1 AWG14 AWG14 ZCAT2132-1130 BLACK B BLACK UL1015 2 T L UL3271 AWG14 W2 W28 TM101 AWG20 ORANGE RED B B 3 UL1015 2 1 AWG20 + WHITE EMI FILTER 3 4 I
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12 CN200 1-1747052-2 G I C7.92-2P RED D12 1 1SS355 DC VOLT I N 2 R601 F201 1.0k R603 R18 C8 C9 T 3.15A 250V ( EM ) I C5 5V 150k 18V CT600 <1/10W> 22k 2200p 220/ 7818 OUTDOOR UNIT 1 <2W> CT-1B 1% <1/10W> C211 15V 50V 1 I O 3 3 + P-AN-CT R14 33/ D9 + G + TM601 3 1 2 C19 C10 C601 INVERTER PCB ASSEMBLY ( MAIN PCB ) + 560k 2 86028 450V D1FL20U 0.1 10/50V D600 0.1 D2 <1/8W> 15V 5 2 DAN217U 1SS355 D7 D1FL20U x 3 MR18Y3H : K07BS-090EHUE-C1 TM600 1% A 1 10 86028 R600 R602 C600 2 9 + C13 12V D
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13 W16 TM101 B RED ORANGE 2 1 C161 + 0.1 3 4 W17 - TM102 OUTDOOR UNIT B BROWN BLACK D100 LL25XB60 TRANSISTOR PCB ASSEMBLY ( I P M PCB ) MR18Y3H : K07BT-0905HUE-TR0 CN303 1971032-5 MR24Y3H : K07BT-0906HUE-TR0 WHITE I C70-2 BA2903F-E2 1 5 2 + 7 6 - 3 4 5 C50 R55 0R0 0R0 W306 I P M-GND B WHITE TM301 P YELLOW R284, R285, R302 0.04 <5W> x 3 TM302 POWER-G POWER-G N BLUE W307 POWER-GND L70 B BLACK R71 150k 15V <1/3W> 1% R360 C332 C302 D307 68 0.1 100/ ZP1027-TP R70 <1/4W> 35V R312 120k L300 R
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14 OUTDOOR UNIT MR18Y3H POWER SUPPLY PCB ASSEMBLY K09DH-0904HUE-FL0 CT OUT W9 W21 B B BLACK GRAY PTC THERMISTOR R101 ZPR0RCH400 C101, C102 C104, C105 VA100, VA101 0.033 0.022 470V 12V L102 W1 x 2 x 2 N200500K1D7C-02N x 2 W28 L 3 4 3 3 4 4 B B BLACK ORANGE 2 1 C100 C103 C108 C106 K101 POWER SOURCE 3.3 3.3 3.3 3.3 G4A-1A or W2 W29 N DW12D1 B B 1 2 1 2 WHITE BROWN L100 SA100 L101 RCH3818-022PF07 RA-302M RCH3818-022PF07 12V CN100 172520-2 F100 1 5.00A POWER RELAY
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15 OUTDOOR UNIT MR24Y3H POWER SUPPLY PCB ASSEMBLY K09DH-0900HUE-FL0 CT OUT W25 W9 W21 B B B ORANGE BLACK GRAY PTC OUT W26 B ORANGE C101, C102 C104, C105 VA100, VA101 0.033 0.022 470V 12V L102 x 2 x 2 N200500K1D7C-02N W1 x 2 W28 L 3 4 3 3 4 4 B B BLACK ORANGE 2 1 C100 C103 C108 C106 K101 POWER SOURCE 3.3 3.3 3.3 3.3 G4A-1A or W2 N W29 DW12D1 B B 1 2 WHITE 1 2 BROWN L100 SA100 L101 RCH3818-022PF07 RA-302M RCH3818-022PF07 CN100 12V 172520-2 F100 1 5.00A POWER REL
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OUTDOOR UNIT MR18Y3H CAPACITOR PCB ASSEMBLY K05FB-0902HUE-P0 W12 W7 P B B WHITE YELLOW C201 C203 + + 660/ 660/ 450V 450V W8 W13 N B B BLUE VIOLET POWER_G MR24Y3H CAPACITOR PCB ASSEMBLY K05FB-0903HUE-P0 W12 W7 P B B WHITE YELLOW C200 - C202 + + + 660/ 450V x 3 W8 W13 N B B BLUE VIOLET POWER_G 16
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ERROR DETECTION Display Error Error Operation Timer LED LED 2 flash Serial signal (reverse) error, at operation start up 3 flash Serial signal (reverse) error, during oeration Serial signal error Normal 4 flash Serial signal (forward) error, at operation start up 5 flash Serial signal (forward) error, during operation 8 flash Wired remote controller error 2 flash Indoor temperature thermistor open / short Indoor unit thermistor error 2 flash 3 flash Heat exchanger middle thermistor open / short
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PARTS INDOOR UNIT 5 4 5 2 4 3 Ref Descriprion Part number 1 Front Panel Total Assy 67201282 2 Front Panel 67201791 3 Intake Grille Assy 67201501 1 4 Air Filter 67201502 5 Clamper Grille 67200936 -- Remote 67201294 -- Remote Holder 67201533 19
