York YEFE BZTM-MOW1 Series Service Manual
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York YEFE BZTM-MOW1 Series Service Manual

Pac fixed speed r410a 60hz cooling only
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LA Fixed_speed side_discharge
Form: MYFETM-MOW1-190830
Service Manual
New Released
PAC Fixed_speed R410a 60Hz
Cooling only SERIES
YEFE(18-60)BZTM-MOW1
YEFE(36-60)BZSM-MOW1
YFFE(18-60)BZTM-MOR1
YFFE(36-60)BZSM-MOR1
YKFE(18-60)BZTM-MOR1
YKFE(36-60)BZSM-MOR1
Issue Date
Aug 30, 2019

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  • Page 1 LA Fixed_speed side_discharge Form: MYFETM-MOW1-190830 Service Manual New Released PAC Fixed_speed R410a 60Hz Cooling only SERIES YEFE(18-60)BZTM-MOW1 YEFE(36-60)BZSM-MOW1 YFFE(18-60)BZTM-MOR1 YFFE(36-60)BZSM-MOR1 YKFE(18-60)BZTM-MOR1 YKFE(36-60)BZSM-MOR1 Issue Date Aug 30, 2019...
  • Page 3 Table of Contents Page 1. Safety Precautions ..................1 In case of Accidents or Emergency Pre-Installation and Installation Operation and Maintenance 2. Specifications ....................3 Model Reference Electrical Wiring Diagrams 3. Product Features ................... 20 Operation Modes and Functions 4. Maintenance and Disassembly ..............25 Maintenance Disassembly 5.
  • Page 5 Safety Precautions Contents In Case of Accidents or Emergency ..............2 Pre-Installation .......................2 Operation and Maintenance .................2...
  • Page 6 To prevent personal injury, or property or unit damage, CAUTION adhere to all precautionary measures and instructions • • While unpacking be careful of sharp edges around outlined in this manual. Before servicing a unit, refer to this the unit as well as the edges of the fins on the con- service manual and its relevant sections.
  • Page 7 Specifications Contents Model Reference ....................4 Electrical Wiring Diagrams ..................6 Indoor Unit ....................6 Outdoor Unit ....................12...
  • Page 8 1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment. Outdoor Unit Model indoor Unit Model Capacity (Btu) Power Supply YFFE18BXTM-M-R1 1 ɸ , 220-230V~, YUFE18BYTM-MO-X YKFE18BXTM-M-R1 60Hz YEFE18BXTM-M-W1 YFFE24BXTM-M-R1 1 ɸ...
  • Page 9 2. Electrical Wiring Diagrams Indoor unit Abbreviation Paraphrase Yellow-Green Conductor CAP1 Indoor Fan Capacitor FAN1, FAN2 Indoor Fan Water Level Switch Swing Motor PUMP PUMP LIVE NEUTRAL TO CCM Comm.Bus Central Controller RT1, T1 Indoor Room Temperature RT2, T2 Coil Temperature of Indoor Heat Exchanger Super High Speed High Speed T3, T4, T5...
  • Page 10 YFFE18BXTM-M-R1, YFFE24BXTM-M-R1, YFFE36BXTM-M-R1, YFFE48BXTM-M-R1, YFFE60BXTM-M-R1 16022700000005 PUMP W . P. SEN SO R FAN2 WHITE WHITE CAP2 N O TE: The w i r i ng di agr am i s f or expl anat i on pur pose onl y. The act ual shape of t he com ponent s m ay be di f f er ent .
  • Page 11 YEFE18BXTM-M-W1, YEFE24BXTM-M-W1, YEFE48BXTM-M-W1, YEFE60BXTM-M-W1, YEFE18BXTM-M-W1, YEFE24BXTM-M-W1, YEFE48BXTM-M-W1, YEFE60BXTM-M-W1 FAN FOR THE FRESH AIR Alarm OR ANION Remote GENERATOR Output Control ALARM ON/OFF CN43 CN33 CN23 PUMP CN13 MAGNETIC RING WIRE DISPLAY CN10 CONTROLLER BOARD INDOOR UNIT BLACK INDOOR COIL TEMP. SENSOR MAINBOARD WHITE ROOM TEMP.
  • Page 12 YKFE60BXTM-M-R1, YKFE60BXTM-M-R1 16022500000850 SU PER H I G H SPEED H I G H SPEED TRANSFORMER N OT E：F OR F AN O P ER A TE S I N S U PE R H IG H S PE E D, P LE A S E S W IT C H HI G H S PE E D TO S UP E R HI G H SP E ED , SE E F AN - WI R I NG P AR T F OR D E TA I L I NF O RM A T IO N !
  • Page 13 For all models: INDOOR UNIT For Cooling&Heating For Cooling only 4-core cable 2-core cable × × 4 1.0mm 2 1.0mm INDOOR POWER: For 1phase 3-core cable 208-240V~ OUTDOOR POWER: 208-240V ~ 3-core cable × 3 1.5mm For 3phase 5-core cable N O TE: OUTDOOR POWER:380V 3N~ The w i r i ng di agr am...
  • Page 14 Outdoor Unit Abbreviation Paraphrase CAP1, CAP2, CAP3,CAP4 Capacitor Outdoor Fan Motor Contactor CT1, CT2 AC Current Detector COMP Compressor L-PRO, K2 Low Pressure Switch/Shorting Stub High Pressure Switch/Shorting Stub TRANS Power Transformer 10KΩ RESISTANCE/Outdoor Ambient Temperature 10KΩ RESISTANCE/Coil Temperature of Condenser 2-Way Terminal/4-Way Terminal 3-Way Terminal Terminal...
  • Page 15 YUFE18BYTM-MO-X, YUFE24BYTM-MO-X C 1 N 1 24V～ POWER SUPPLY TO INDOOR UNIT  Page 11 ...
  • Page 16 YUFE36BYTM-MO-X BLACK BLACK WHITE C O M P BLACK OUTDOOR WIRING DIAGRAM BLACK C O D E PAR T N AM E BLUE BLUE C O M P C O M PR ESSO R O U TD O O R FAN C 1 N 1 C AP1 C O M P C APAC I TO R...
  • Page 17 YUFE48BYTM-MS-1 C 1 N1 16022500001328 24V~ YUFE48BYSM-MS-1 LOW PRESSURE SWITCH L-PRO / SHORTING STUB 10K RESISTANCE / ROOM TEMP. SENSOR 202075790237 24V~ 16022700001387  Page 13 ...
  • Page 18 YUFE60BYTM-MS-1 YUFE60BYSM-MS-1  Page 14 ...
  • Page 19 1. Operation Modes and Functions Abbreviation Unit element abbreviations Abbreviation Element Indoor room temperature Coil temperature of evaporator Coil temperature of condenser Outdoor ambient temperature Set temperature Safety Features Compressor Three-minute Delay at Restart Compressor functions are delayed for up to one minute upon the first startup of the unit, and are delayed for up to three minutes upon subsequent unit restarts.
  • Page 20 Product Features Contents Operation Modes and Functions ................21 Abbreviation ....................21 Safety Features ....................21 Display Function ..................21 Fan Mode ....................22 Cooling Mode .....................22 Auto-mode ....................22 Drying Mode ....................22 Timer Function ....................22 Sleep Function .....................22 1.10 Auto-Restart Function ..................23 1.11 Refrigerant Leakage Detection ..............23 1.12 Follow Me(Optional) ..................23 1.13 Drain Pump Control (For Duct and Cassette) ..........24...
  • Page 21 Fan Mode When fan mode is activated: • The outdoor fan and compressor are stopped. • Temperature control is disabled and no temperature setting is displayed. • The indoor fan speed can be set to high, medium, low, or auto. •...
  • Page 22 operation of compressor, except the following situations. preset time. • Timer Off. The machine turns off automatically at the • High temperature protection of evaperator preset time. • Defrosting • Timer On/Off. The machine turns on automatically at • Current protection the preset On Time, and then turns off automatically 1.6.4 Defrosting mode...
  • Page 23 1. Maintenance With this new technology, the display area will show “EC” when the outdoor unit detects refrigerant leakage. First Time Installation Check 1.13 Follow me(Optional) Air and moisture trapped in the refrigerant system affects • If you press “Follow Me” on the remote, the indoor the performance of the air conditioner by: unit will beep.
  • Page 24  Page 20 ...
  • Page 25 Maintenance and Disassembly Contents Maintenance ......................26 First Time Installation Check ................26 Refrigerant Recharge ...................28 Re-Installation .....................29 1.3.1 Indoor Unit ..................29 1.3.2 Outdoor Unit ................31 Disassembly ......................33 Indoor Unit ....................33 Outdoor Unit ....................60...
  • Page 26 Procedure: Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves are closed. Connect the charge hose with the push pin of Handle Lo to the gas service port of the 3-way valve. Connect another charge hose to the vacuum pump.
  • Page 27 Loosen the flare nut of the 3-way valve for 6 or 7 seconds and then tighten the flare nut again. a. Confirm the pressure display in the pressure indicator is slightly higher than the atmospheric pressure. b. Remove the charge hose from the 3-way valve. Fully open the 2- and 3-way valves and tighten the cap of the 2- and 3-way valve.
  • Page 28 Prior to recharging the refrigerant, confirm the additional amount of refrigerant required using the following table: Models Standard length Max. elevation Max. length Additional refrigerant 5m (16.4ft) 15m (49.2ft) 25m (82ft) 30g/m (0.32oz/ft) 5m (16.4ft) 15m (49.2ft) 25m (82ft) 65g/m (0.69oz/ft) 5m (16.4ft) 20m (65.6ft) 30m (98.4ft)
  • Page 29 1.3.1 Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Confirm that the 2- and 3-way valves are opened. Connect the charge hose with the push pin of Handle Close the 3-way valve so that the gauge rests Lo to the 3-way valve’s gas service port. between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi).
  • Page 30 Procedure: Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves • If the pressure successfully reaches -0.1 MPa are closed. (14.5 Psi), fully close the Handle Lo valve, then Connect the charge hose with the push pin of Handle cease vacuum pump operations.
  • Page 31 Evacuation for the whole system Procedure: Confirm that the 2- and 3-way valves are opened. Connect the vacuum pump to the 3-way valve’s needle moves after turning off the vacuum pump. If service port. the gauge needle moves backward, check whether there is gas leakage.
  • Page 32 Refrigerant charging Procedure: Tighten the flare nuts of the indoor and outdoor and record the starting weight. units, and confirm that both the 2- and 3-way valves Fully open the Handle Lo manifold valve, 2- and are closed. 3-way valves. Slightly connect the Handle Lo charge hose to the Operate the air conditioner in cooling mode and 3-way service port.
  • Page 33 2. Disassembly Indoor unit 2.1.1 Ceiling&Floor Front Panel Procedure Illustration 1) Remove the 2 screws of return air grille subassembly and release the 2 hooks. (see CJ_CF_001) CJ_CF_001 2) Release the 2 hooks for each filter, and then pull up the filter. (see CJ_CF_002) CJ_CF_002 Note: This section is for reference only.
  • Page 34 Electrical parts (Antistatic gloves must be worn.) Procedure Illustration 1) Remove 4 screws of the cover of electronic control box and then remove the cover. (see CJ_CF_003) CJ_CF_003 2) Disconnect the connectors and then remove the main control board. (see CJ_CF_004) CJ_CF_004 Note: This section is for reference only.
  • Page 35 Fan motor and fan Procedure Illustration 1) Remove the fix screw of supporting board. (see CJ_CF_005) CJ_CF_005 2) Remove the screws of fan motor support and then remove the screw of ground wire. (see CJ_CF_006) CJ_CF_006 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 36 Procedure Illustration 3) Remove the two screws of the fan motor shaft. (see CJ_CF_007) CJ_CF_007 4) Release the hooks of the volute shell and then pull up it. (see CJ_CF_008) CJ_CF_008 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 37 Procedure Illustration 5) Remove the fixing screws of fan (3 screws). (see CJ_CF_009) CJ_CF_009 Note: This section is for reference only. Actual unit appearance may vary.  Page 33 ...
  • Page 38 Evaporator Procedure Illustration 1) Remove the screws of left and right panel and then push it in the direction shown in the figure to move it. (see CJ_CF_010) CJ_CF_010 2) Remove the screws of the front panel(9 screws). (see CJ_CF_011) CJ_CF_011 Note: This section is for reference only.
  • Page 39 Procedure Illustration 3) Remove the 1 screw of the water collector. (see CJ_CF_012) CJ_CF_012 4) Remove the 4 screws of board and then remove it. (see CJ_CF_013) CJ_CF_013 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 40 Procedure Illustration 5) Remove the screws of the pipe clamp board. (see CJ_CF_014) CJ_CF_014 6) Pull up the temperature sensor. (see CJ_CF_015) CJ_CF_015 Note: This section is for reference only. Actual unit appearance may vary.  Page 36 ...
  • Page 41 Procedure Illustration 7) Remove the screws of the front evaporator support. (5 screws) (see CJ_CF_016) CJ_CF_016 8) Remove the screws of the rear evaporator support then pull out the evaporator. (4 screws) (see CJ_ CF_017) CJ_CF_017 9) Remove 2 screws and Remove step motor.
  • Page 42 Display Board Procedure Illustration 1) Remove 2 screws of display board and remove the display. (see CJ_ CF_019) CJ_CF_019 Note: This section is for reference only. Actual unit appearance may vary.  Page 38 ...
  • Page 43 2.1.2 A6 Duct Electrical parts (Antistatic gloves must be worn.) Procedure Illustration 1) Remove 5 screws of the cover of electronic control box and then remove the cover. (see CJ_A6_001) CJ_A6_001 2) Remove the 2 screws of the electronic control box. Then release the 2 hooks of the main control board.
  • Page 44 Procedure Illustration 3) Disconnect the connectors and then remove the front main control board. (see CJ_A6_003) 4) Turn over the electronic control box. CJ_A6_003 Disconnect the connectors and remove the 2 screws of rear main control board. (see CJ_A6_004) CJ_A6_004 Note: This section is for reference only.
  • Page 45 Procedure Illustration 5) Remove 2 screws of reactor and remove the reactor. (see CJ_A6_005) CJ_A6_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 41 ...
  • Page 46 Fan motor and fan Procedure Illustration 1) Remove 10 screws of the top cover and then remove the top cover. (see CJ_A6_006) CJ_A6_006 2) Release the 8 hooks of volute shell. (see CJ_A6_007) CJ_A6_007 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 47 Procedure Illustration 3) Remove the fiing screws of fan (2 screws). (see CJ_A6_008) CJ_A6_008 Note: This section is for reference only. Actual unit appearance may vary.  Page 43 ...
  • Page 48 Evaporator Procedure Illustration 1) Remove 9 Screws of the water collecter and remove the water collecter. (see CJ_A6_009) CJ_A6_009 2) Remove the screws of the pipe clamp board and the left side board (3 for the pipe clamp and 9 for left side board). (see CJ_A6_010) CJ_A6_010 Note: Remove the front panel (refer to 1.
  • Page 49 Procedure Illustration 3) Remove the 2 fixing screws of the evaporator support and then pull up the temperature sensor. (see CJ_A6_011) CJ_A6_011 4) Remove the fixing screw of the evaporator and then remove it. (see CJ_A6_012) CJ_A6_012 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 50 2.1.3 Cassette Front Panel and Display Board Procedure Illustration 1) Release the 2 hooks and open the panel. (see CJ_CASSETTE_001 ) CJ_CASSETTE_001 2) Pull up the filter. (see CJ_ CASSETTE_002 ) CJ_CASSETTE_002 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 51 Procedure Illustration 3) Disconnect the connectors and release the panel. (see CJ_ CASSETTE_003 ) CJ_CASSETTE_003 Note: This section is for reference only. Actual unit appearance may vary.  Page 47 ...
  • Page 52 Electrical parts (Antistatic gloves must be worn.) Procedure Illustration 1) Remove the 2 screws and remove the cover of electronic control box. (see CJ_CASSETTE_004 ) CJ_CASSETTE_004 2) Remove the 2 screws of the main control board. (see CJ_ CASSETTE_005) CJ_CASSETTE_005 Note: This section is for reference only.
  • Page 53 Procedure Illustration 3) Disconnect the connectors and then remove the main control board. (see CJ_CASSETTE_006) CJ_CASSETTE_006 Note: This section is for reference only. Actual unit appearance may vary.  Page 49 ...
  • Page 54 Display Board Procedure Illustration 1) Remove the 2 screws of display board and remove the display board. (see CJ_CASSETTE_007) CJ_CASSETTE_007 2) Turn over the display board, prise the 6 hooks with a flat screwdriver as shown in the figure. (see CJ_ CASSETTE_008) CJ_CASSETTE_008 Note: This section is for reference only.
  • Page 55 Fan motor and fan Procedure Illustration 1) Remove the fixing nut of the fan and then pull up the fan. (see CJ_ CASSETTE_009) CJ_CASSETTE_009 2) Remove the 2 screws of fixing board and the 4 fixing nuts of fan motor. (see CJ_CASSETTE_010) CJ_CASSETTE_010 Note: This section is for reference only.
  • Page 56 Evaporator Procedure Illustration 1) Remove the 4 screws of the panel and pull up the panel. (see CJ_ CASSETTE_011) CJ_CASSETTE_011 2) Remove the 2 screws of seal boardpipe clamp board. (see CJ_ CASSETTE_012) CJ_CASSETTE_012 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 57 Procedure Illustration 3) Remove the 4 screws of the evaporator support and then remove it. (see CJ_CASSETTE_013) CJ_CASSETTE_013 4) Remove the 2 screws of the evaporator fixing bracket and then remove it. (see CJ_CASSETTE_014) CJ_CASSETTE_014 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 58 Water Pump Procedure Illustration 1) Take off the fasten belt of the water pump. (see CJ_CASSETTE_015) CJ_CASSETTE_015 2) Pinch the metal wire in the direction shown in the fiure to release it. (see CJ_CASSETTE_016) CJ_CASSETTE_016 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 59 Procedure Illustration 3) Remove the 3 fixing screws and then remove the water pump. (see CJ_CASSETTE_017) CJ_CASSETTE_017 Note: This section is for reference only. Actual unit appearance may vary.  Page 55 ...
  • Page 60 Outdoor unit Panel Plate YUFE18BYTM-MO-X, YUFE24BYTM-MO-X, MOCA30U-18HN1-NB8, MOCA30U-24HN1-NB8 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_CA30_001). CJ_CA30_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 61 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_CA30_003). Front Panel CJ_CA30_003 5) Remove the screws of water collecting cover and then remove the water Water Collecting Cover collecting cover (1 screw) (see CJ_ CA30_004).
  • Page 62 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_CA30_005). Right Panel CJ_CA30_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 58 ...
  • Page 63 YUFE36BYTM-MO-X , YUFE36BYSM-MO-1, MOD30U-36HN1-NB8 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (2 screws) (see CJ_D30_001). CJ_D30_001 3) Remove the screws of the top cover and then remove the top cover (4 Top Cover screws).
  • Page 64 Procedure Illustration 4) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_D30_003). CJ_D30_003 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see CJ_D30_004). Front Panel CJ_D30_004 Note: This section is for reference only.
  • Page 65 Procedure Illustration 6) Remove the screws of water collecting cover and then remove the water Water Collecting Cover collecting cover (2 screw) (see CJ_ D30_005). CJ_D30_005 7) Remove the screws of the right panel and then remove the right panel (8 screws) (see CJ_D30_006).
  • Page 66 YUFE48BYTM-MS-1, YUFE48BYSM-MS-1, MOE30U-48HN1-NB8, YUFE60BYTM-MS-1, YUFE60BYSM-MS-1, MOE30U-60HN1-NB8 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (2 screws) (see CJ_E30_001). CJ_E30_001 3) Remove the screws of the top cover and then remove the top cover (4 screws).
  • Page 67 Procedure Illustration 5) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_E30_004). CJ_E30_004 Note: This section is for reference only. Actual unit appearance may vary.  Page 63 ...
  • Page 68 Procedure Illustration 6) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_E30_005). Front Panel CJ_E30_005 7) Remove the screws of the right panel and then remove the right panel (10 screws) (see CJ_E30_006). Right Panel CJ_E30_006 Note: This section is for reference only.
  • Page 69 Fan disassembly Note: Remove the panel plate and (refer to 1. Panel plate) before disassembling fan. YUFE18BYTM-MO-X, YUFE24BYTM-MO-X, YUFE36BYTM-MO-X Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_001 ). 2) Remove the fan. D-cut CJ_ODU_001 3) Disconnect the connectors for fan motor.
  • Page 70 Procedure Illustration 4) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_003 ). 5) Remove the fan motor. Fan Motor CJ_ODU_003 Note: This section is for reference only. Actual unit appearance may vary.  Page 66 ...
  • Page 71 MOCA30U-18HN1-NB8, MOCA30U-24HN1-NB8 , MOD30U-36HN1-NB8, YUFE36BYSM-MO-1 Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_004). 2) Remove the fan. D-cut CJ_ODU_004 3) Disconnect the connectors for fan motor. (see CJ_ODU_005) CJ_ODU_005 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 72 Procedure Illustration 4) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_006). 5) Remove the fan motor. Fan Motor CJ_ODU_006 Note: This section is for reference only. Actual unit appearance may vary.  Page 68 ...
  • Page 73 YUFE48BYTM-MS-1, YUFE48BYSM-MS-1, MOE30U-48HN1-NB8, YUFE60BYTM-MS-1, YUFE60BYSM-MS-1, MOE30U-60HN1-NB8 Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_007). 2) Remove the fan. 3) Disconnect the connectors for fan motor from the terminal. (see CJ_ ODU_007) D-cut CJ_ODU_007 Fan Motor 4) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_008).
  • Page 74 Electrical parts Note: Remove the panel plate and fan assembly (refer to 1. Panel plate and 2. Fan assembly) before disassembling electrical parts. YUFE18BYTM-MO-X, YUFE24BYTM-MO-X, YUFE36BYTM-MO-X Procedure Illustration 1) Remove the two screws fixed the electronic control board (see CJ_ ODU_009).
  • Page 75 MOCA30U-18HN1-NB8, MOCA30U-24HN1-NB8 , MOD30U-36HN1-NB8, YUFE36BYSM-MO-1 Procedure Illustration 6) Disconnect the power transformer (see CJ_ODU_010) 7) Disconnect the wires connected to terminals. (see CJ_ODU_010) 8) Disconnect the wires connected to contactor. (see CJ_ODU_010) 9) Disconnect the wires connected to T3/T4 sensor. (see CJ_ODU_010) CJ_ODU_010 Note: This section is for reference only.
  • Page 76 YUFE48BYTM-MS-1, YUFE48BYSM-MS-1, MOE30U-48HN1-NB8, YUFE60BYTM-MS-1, YUFE60BYSM-MS-1, MOE30U-60HN1-NB8 Procedure Illustration 10) Disconnect the wires connected to the transformer. (see CJ_ODU_011) 11) Disconnect the wires connected to high/low pressure switch. (see CJ_ ODU_011) 12) Disconnect the wires connected to indoor unit. (see CJ_ODU_011) 13) Disconnect the wires connected to AC contactor.
  • Page 77 Procedure Illustration 15) Remove the 1 screw of the AC contactor and then remove it. (see CJ_ODU_013) CJ_ODU_013 16) Remove 2 screws of the transformer and then remove it. (see CJ_ ODU_014) CJ_ODU_014 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 78 Sound blanket WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_015 ).
  • Page 79 Four-way valve (For heat pump models) WARNING: Recover refrigerant from the refrigerant circuit before remove the four-way valve. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling four-way valve. Procedure Illustration 1) Heat up the brazed parts and then detach...
  • Page 80 Compressor WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling compressor. Procedure Illustration 1) Remove the flange nut of terminal cover and remove the termianal cover (see CJ_ ODU_017 ).
  • Page 81 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_019 ). CJ_ODU_019 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_020 ). Discharge Pipe 5) Lift the compressor from the base pan assembly with pliers.
  • Page 82 Troubleshooting Contents Safety Caution .....................84 General Troubleshooting ..................85 Error Display (Indoor Unit) ................85 Error Display (Outdoor Unit) .................87 Error Diagnosis and Troubleshooting Without Error Code .......88 Remote maintenance ...................88 Field maintenance ..................89 Quick Maintenance by Error Code ..............94 Troubleshooting by Error Code ................95 Common Check Procedures.................95 Open circuit or short circuit of T1 or T2 temperature sensor diagnosis and solution .........................96...
  • Page 83 Troubleshooting Contents Phase Sequence diagnosis and solution .............102 Lack of Phase diagnosis and solution ............103 5.10 Overload current protection diagnosis and solution ........104 5.11 High temperature or protection of pressure diagnosis and solution ....105...
  • Page 84 1. Safety Caution WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. For other models, connect discharge resistance (approx.100Ω 40W) or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor.
  • Page 85 2. General Troubleshooting Error Display (Indoor Unit) When the indoor unit encounters a recognized error, the indicator light will flash in a corresponding series, the timer display may turn on or begin flashing, and an error code will be displayed. These error codes are described in the following table: For Ceiling&floor type: Operation...
  • Page 86 For Super-slim cassette type: Operation Timer Defrosting Alarm Display Error Information Solution lamp lamp lamp lamp Indoor room temperature sensor T1 is in open Page 96 fl fl F lash circuit or has short circuited Evaporator coil temperature sensor T2 is in Page 96 Flash open circuit or has short circuited...
  • Page 87 Error Display (Outdoor Unit) (excep for 18k/24k/36k single phase cooling-only models) LED1 LED2 LED3 Error Information Solution Phase sequence Page 102 Flash Lack of phase(A,B) Page 103 Flash Lack of phase(C) Page 103 Protection of low pressure (only for 48k and 60k Page 105 Flash Flash...
  • Page 88 3. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start Page 90-91...
  • Page 89 Field maintenance Problem Solution Unit will not start Page 92-93 Compressor will not start but fans run Page 92-93 Compressor and condenser (outdoor) fan will not start Page 92-93 Evaporator (indoor) fan will not start Page 92-93 Condenser (Outdoor) fan will not start Page 92-93 Unit runs, but shortly stops Page 92-93...
  • Page 90 1.Remote Maintenance Electrical Circuit Refrigerant Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ Operation is erratic, unpredictable, or unit is unresponsive The tempreture on the playboard cannot be setted ☆ ☆ Unit is on but the wind is not cold(hot) ☆...
  • Page 91 Others ☆ ☆ ☆ ☆ ☆ ☆ ☆  Page 87 ...
  • Page 92 Electrical Circuit 2.Field Maintenance Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...
  • Page 93 Refrigerant Circuit Others ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆...
  • Page 94 4. Quick Maintenance by Error Code If you do not have the time to test whether specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table. For ceiling&floor type and super-slim cassette type: Error Code Part requiring replacement...
  • Page 95 5. Troubleshooting by Error Code Common Check Procedures 5.1.1 Temperature Sensor Check Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor. Measure the resistance value of each winding by using the multi-meter.
  • Page 96 E2/E3/E4 for ceiling&floor type and super slim cassette type&E4/E5/F2 for A6 duct type (Open circuit or short circuit of temperature sensor diagnosis and solution) Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Recommended parts to prepare: •...
  • Page 97 E7 for ceiling&floor type and super slim cassette type&E0 for A6 duct type (EEPROM parameter error) Description: Indoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB • Troubleshooting and repair: Shut of f t he pow er suppl y and t ur n i t on 2 m i nut es l at er .
  • Page 98 E8 for ceiling&floor type and super slim cassette type&EE for A6 duct type (Water level alarm malfunction diagnosis and solution) Description: The water level switch is at the max. position to shut down the unit. Recommended parts to prepare: • Faulty drain pump (for units with drain pump) •...
  • Page 99 EC (Refrigerant Leakage Detection diagnosis and solution) Description: Define the evaporator coil temp.T2 of the compressor just starts running as Tcool. If the following occurs 3 times, the display shows “EC” and the unit switches off: In the first 8 minutes after the compressor starts up, if T2 <Tcool-2°C is not maintained for 4 seconds and compressor running frequency is not higher than 50Hz for 3 minutes.
  • Page 100 F0(Communication malfunction between indoor unit and auto-lifting panel diagnosis and solution) Description: Indoor PCB does not get the feedback from the PCB of auto-lifting panel. Recommended parts to prepare: • Wiring mistake between indoor PCB and auto-lifting panel • Faulty PCB of auto-lifting panel •...
  • Page 101 F1(Auto-lifting panel malfunction diagnosis and solution) Description: Indoor PCB does not get the right close position from the PCB of auto lifting-panel when the panel motor stops Recommended parts to prepare: • Wiring mistake between indoor PCB and auto-lifting panel •...
  • Page 102 Phase sequence error diagnosis and solution Description: Outdoor PCB detects the wrong phase sequence of 3-phase power supply. Recommended parts to prepare: • Wiring mistake of 3-phase power supply • Faulty outdoor PCB Troubleshooting and repair: Phase sequence error Phase sequence error C hange the order of tw o of the C hange the order of tw o of the w i res to pow er suppl y.
  • Page 103 Lack of Phase diagnosis and solution Description: Outdoor PCB detects the voltage of one or two phase are very low. Recommended parts to prepare: • Problems of 3-phase power supply • Wiring mistake of 3-phase power supply • Faulty outdoor PCB Troubleshooting and repair: Lack of phase...
  • Page 104 5.10 Overload current protection diagnosis and solution Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Power supply problems. • System blockage • Faulty PCB • Wiring mistake • Compressor malfunction Troubleshooting and repair: C heck the pow er suppl y.
  • Page 105 5.11 High temperature or protection of pressure diagnosis and solution Description: The High pressure switch detects a ultra high pressure or the Low pressure switch detects a ultra low switch, which could damage the system. Recommended parts to prepare: • Bad wiring of the pressure switches •...
  • Page 106 Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..112 Pressure On Service Port ...................113...
  • Page 107 i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731...
  • Page 108 ii) Pressure On Service Port(R410A) Cooling chart: °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) 70/59 10.1 10.6 75/63 10.7 11.2 80/67 11.2 11.9 90/73 10.5 10.3 10.0 10.6 12.4 13.0 °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89)
  • Page 109 Heating chart: 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 32.5 30.0 26.6 25.4 23.3 20.5 19.0 33.8 31.5 27.8 26.3 24.9 21.5 20.0 57/53 47/43 37/33 27/23...
  • Page 110 2019 Johnson Controls, Inc. www.johnsoncontrols.com Form: MYFETM-MOW1-190830 Johnson Controls reserve the right to change product features without prior notice.

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