Lennox MCA Series Service Manual
Mini-split systems
Hide thumbs
Also See for MCA Series:
- Installation instructions manual (20 pages) ,
- User manual (8 pages)
Table of Contents
Advertisement
Please refer to Corp1908-L5 for indoor and outdoor unit error codes and component diagnostics.
Table of Contents
1. Indoor Units ................................................3
1.1.
Model Number Identification ................................... 3
1.2.
Indoor Unit Specifications ....................................... 3
1.3.
Indoor Unit Dimensions .......................................... 4
1.4.
Indoor Unit Clearances ........................................... 5
1.5.
Indoor Unit Wall Mounts ......................................... 5
2. Indoor/Outdoor Matches ...........................6
3. Air Throw Data ...........................................6
Systems .....................................................7
4.1.
Overview ................................................................. 7
4.2.
Wire Gauge............................................................. 7
4.3.
Terminal Connections ............................................. 8
5. Indoor Unit Diagrams ................................8
6. Wireless Remote ......................................10
6.1.
Requirements ....................................................... 10
6.2.
Remote Control Specifications ............................. 10
6.3.
Function Buttons ................................................... 11
6.4.
Display .................................................................. 12
6.5.
Operations ............................................................ 12
6.5.1.
Start/Stop Operation .............................. 12
MCWA Wall Mount Single Zone
Air Conditioning Indoor Unit
MINI-SPLIT SYSTEMS SERVICE MANUAL
MCA Series Unit Information
MCA Single Zone Air
Conditioning Outdoor Unit
6.5.2.
6.5.3.
6.5.4.
6.5.5.
6.5.6.
6.5.7.
6.5.8.
7.1.
(Used with VRF Only) ........................................... 13
7.2.
Controller .............................................................. 14
7.3.
Dry Mode Operation - Indoor Units ....................... 14
7.3.1.
7.3.2.
7.4.
Test Run - Indoor Units ......................................... 14
7.4.1.
7.4.2.
7.5.
Double-Check Pipe Connections .......................... 15
7.6.
Ambient Temperature is Below 63°F (17°C) ......... 15
8. Single Zone Outdoor Units .....................16
8.1.
Model Number Identification ................................. 16
8.2.
Specifications........................................................ 16
8.3.
Cooling Capacity................................................... 17
8.3.1.
8.3.2.
8.3.3.
1
Supersedes 8/2019
Select Fahrenheit or Celsius ............... 12
Cool/Fan mode ..................................... 12
Dry Mode ................................................ 12
Timer Operation ..................................... 12
Timer ON Operation ............................... 12
Timer OFF Operation ............................. 13
Modify Timer ON/OFF settings ............... 13
Procedure ............................................... 14
Dry Mode Operation Sequence .............. 14
Test Run Instructions .............................. 14
Before Test Run ...................................... 14
- 009 (208/230V) .................................... 17
- 012 (115V) ............................................ 18
- 012 (208/230V) .................................... 18
CORP1907-L5
11/2020
Advertisement
Table of Contents
Related Manuals for Lennox MCA Series
Summary of Contents for Lennox MCA Series
-
Page 1: Table Of Contents
MINI-SPLIT SYSTEMS SERVICE MANUAL MCA Series Unit Information CORP1907-L5 11/2020 Supersedes 8/2019 Please refer to Corp1908-L5 for indoor and outdoor unit error codes and component diagnostics. MCWA Wall Mount Single Zone Air Conditioning Indoor Unit MCA Single Zone Air Conditioning Outdoor Unit Table of Contents 6.5.2. - Page 2 8.3.4. - 018 (208/230V) ........19 18.1.4. Fan Motor and Fan ......... 37 8.3.5. - 024 (208/230V) ........19 18.1.5. Step Motor ..........37 8.4. Outdoor Unit Dimensions........20 18.1.6. Drain Hose ..........37 8.5. Outdoor Unit Clearances ........21 18.2. Outdoor Unit ............38 8.5.1. Single Units ..........21 18.2.1. Panel Plate (MWCA009S4, MWCA012S4 and MWCA018S4)...
-
Page 3: Indoor Units
1. Indoor Units 1.1. Model Number Identification WALL-MOUNTED INDOOR UNITS M WC A 009 S 4 - 1 P Series Type Voltage M = Mini-Split L = 115V-1 phase-60Hz P = 208/230V-1 phase-60Hz Unit Type Minor Design Sequence WC = Wall-Mounted Non-Ducted Unit 1 = 1st Revision Major Design Sequence A = First Generation Refrigerant Type 4 = HFC-410A Nominal Cooling Capacity Cooling Efficiency 009 = 0.75 ton S = Standard Efficiency... -
Page 4: Indoor Unit Dimensions
1.3. Indoor Unit Dimensions TOP VIEW SIDE VIEW FRONT VIEW SIDE VIEW BOTTOM VIEW Figure 1. Indoor Unit Dimensions - Inches (mm) Size 29-5/8 11-3/8 8-5/8 32-3/4 11-3/4 8-3/4 39-1/8 12-1/2 9-7/8 1118 13-1/4 10-1/4... -
Page 5: Indoor Unit Clearances
1.4. Indoor Unit Clearances Ceiling 6” (152 mm) Minimum Clearance Wall Any Object Wall 5” 5” 59” (127 mm) (127 mm) (1499 mm) Minimum Minimum Minimum SIDE VIEW Vertical Clearance - Clearance to Floor - 72 inches (1829 mm) Minimum 96 inches (2438 mm) Recommended Floor FRONT VIEW... -
Page 6: Indoor/Outdoor Matches
2. Indoor/Outdoor Matches Cooling AHRI Indoor Unit Type Outdoor Unit Indoor Unit SEER Capacity Reference Wall-Mounted MCA009S4S-1P MWCA009S4-1P 9,000 19.00 11.10 202515503 Ductless MCA012S4S-1L MWCA012S4-1L 12,000 16.50 10.00 202515502 MCA012S4S-1P MWCA012S4-1P 11,500 19.00 11.10 202515504 MCA018S4S-1P MWCA018S4-1P 17,000 20.00 10.80 202515505 MCA024S4S-1P MWCA024S4-1P... -
Page 7: Power And Communication Wiring For Systems
4. Power and Communication Wiring for See “Table 1. Single Zone Installation Wiring Requirements” and “Table 2. Specifications” on page 10 for wiring Systems requirements. CAUTION 4.2. Wire Gauge This unit must be properly grounded and protected by a circuit breaker. The ground wire for the unit must not be Table 1. -
Page 8: Terminal Connections
4.3. Terminal Connections 115VAC Indoor Unit 208/230V Indoor Unit Terminal Block 115VAC Outdoor Unit Terminal Block 208/230V Outdoor Unit Terminal Block Terminal Block From Power From Power Suppl y Suppl y 18 and 24K unit has five terminal sets. Outdoor Unit Indoor Unit Outdoor Unit Indoor Unit... - Page 9 FOR REMOTE ON/OF NOTE: COMPONENT IN DASH LINE IS OPTIONAL OR FIELD WIRING MODE REMOTE ON/OFF ON REMOTE ON/OFF OFF FACTORY SETTING (T1) (T2) CN10A D IS PLAY B O ARD ADAPTER BOARD CN 2 (C N2 01 CN 3 (C N3 CN 50 1 CN 40 2 OP TION AL...
-
Page 10: Wireless Remote
6. Wireless Remote • Do not submerge the remote controller in liquid. • Do not expose to direct sunlight. IMPORTANT! • Do not drop or step on remote controller. Frequent changes to operating mode may cause system • Remote control holder malfunction. Allow at least one minute between mode Use field-provided fasteners to attach the remote controller changes for the system to stabilize. holder to any suitable vertical surface such as a wall. 6.1. Requirements 6.2. Remote Control Specifications Using the remote controller Table 2. Specifications • Point the remote controller directly at the indoor unit. Function Specifications • Stand within 26 feet (8 meters) of the indoor unit. Rated voltage 3.0 VDC (2 AAA batteries) •... -
Page 11: Function Buttons
Transmission Indicator Displayed when remote sends signal to indoor unit ON/OFF display Appears when the unit is turned on, and disappears when it is turned off TIMER ON display TIMER OFF display MODE display Displayed when TIMER Displayed when TIMER OFF is set ON is set COOL... -
Page 12: Display
• Direct (Direction) button. Press to move louvers up When the function is set to on, this option may help in and down in six degree increments. Louvers remain in maintaining a closer comfort level in most cases. place where stopped. • Fan speed. Displays the current fan speed. • LED button. Press the LED button to turn on the indoor 6.5. Operations unit display (on units with display). Press the button again to turn off the display. 6.5.1. Start/Stop Operation • Follow (Follow Me) button. Press to activate the Press the LED power button. wireless remote’s air temperature sensor. This will also transfer the temperature sensing function from • Controller ON: LED power button lit brightly. the indoor unit to the remote. The indoor unit’s air • Controller OFF: LED power button not lit. -
Page 13: Timer Off Operation
hours, then the increment becomes one hour. 3. Set the timer to 0.0 to turn off timed operation. 6.5.7. Timer OFF Operation 7. Connection to Centralized Controller 1. Press the Timer OFF button. The Timer OFF icon, the 7.1. Set Indoor Unit Address for Centralized last auto-off time, and “h” will display. Control (Used with VRF Only) 2. Press the Timer OFF button again to set the amount of time before the indoor unit stops operation. Each press All indoor units connected to a centralized controller must will increase the time in half hour increments until 10 have a unique address. Use the S1 dip switch and the S2... -
Page 14: Indoor Unit Connection Points For Centralized Controller
Dry Mode Operation Sequence Centralized Controller When in dry mode operation the unit is actually in cooling mode with a low speed blower operation. The compressor Mini-split indoor units can be connected to a centralized will stop when the room temperature is two degrees Celsius controller (e.g. Lennox VRF Manager - LVM or Trane Tracer) lower than the temperature setting. or a BACnet or LonWorks gateway using the XYE terminals However there is a temperature compensation for cooling on the indoor unit main board. mode that is two degrees Celsius. So the unit will stop when the temperature is four degrees Celsius lower than the room temperature settings. -
Page 15: Double-Check Pipe Connections
7.5. Double-Check Pipe Connections During operation, the pressure of the refrigerant circuit will increase. This may reveal leaks that were not present during your initial leak check. Take time during the Test Run to double-check that all refrigerant pipe connection points do not have leaks. • Using remote control, return unit to the normal operating temperature. • Using insulation tape, wrap the indoor refrigerant pipe connections that you left uncovered during the indoor unit installation process. 7.6. Ambient Temperature is Below 63°F (17°C) You can’t use the remote controller to turn on the COOL function when the ambient temperature is below 17°C. In this instance, you can use the MANUAL CONTROL button... -
Page 16: Single Zone Outdoor Units
8. Single Zone Outdoor Units NOTE: Outdoor units can only be installed in an unenclosed outdoor environment. 8.1. Model Number Identification M C A 009 S 4 S - 1 P Series Type Voltage M = Mini-Split L = 115V-1 phase-60Hz P = 208/230V-1 phase-60Hz Minor Design Sequence Unit Type 1 = 1st Revision C = Air Conditioner Refrigerant Circuits S = Single Circuit... -
Page 17: Cooling Capacity
Application area - ft.² 130 - 195 170 - 250 (115V) 250 - 355 310 - 460 160 - 240 (208/230V) PSIG 550/340 550/340 550/340 550/340 Design Pressure Shipping Net/Shipping weight (lbs.) (115V) - - - 63 / 68 - - - - - - Data (208/230V) 54 / 59 55 / 60 66 / 73 89 / 96 ELECTRICAL DATA Electrical Characteristics - 60 Hz - 1 Phase 208/230V 115V 208/230V... -
Page 18: 012 (115V)
8.3.2. - 012 (115V) Outdoor Indoor Temperature - °F (Dry Bulb / Wet Bulb) Temperature - °F 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F (Dry Bulb) Total Sensible Total Sensible Total Sensible Total Sensible mBtuh mBtuh mBtuh mBtuh... -
Page 19: 018 (208/230V)
8.3.4. - 018 (208/230V) Outdoor Indoor Temperature - °F (Dry Bulb / Wet Bulb) Temperature - °F 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F (Dry Bulb) Total Sensible Total Sensible Total Sensible Total Sensible mBtuh mBtuh mBtuh mBtuh... -
Page 20: Outdoor Unit Dimensions
8.4. Outdoor Unit Dimensions MCA009S4S, MCA012S4S, MCA081S4S 30-5/8 (778) 21-7/8 (556) 19-1/8 (486) (13) 11-7/8 (302) 30-3/8 (772) 2-3/4 2-1/2 SIDE VIEW FRONT VIEW (64) (70) 1/2 (13) DRAIN HOLE (bottom of unit) 11-1/4 11-3/4 (286) (298) 12-5/8 (322) 2-3/8 (60) 3-5/8 (92) BOTTOM VIEW SIDE VIEW... -
Page 21: Outdoor Unit Clearances
8.5. Outdoor Unit Clearances 8.5.1. Single Units 24 (610) Air Inlet (305) (305) (610) (2007) Air Outlet Minimum rear clearance can be 6 inches (152 mm) when mounted on brackets and with no obstructions on the other three sides. Figure 20. Single Outdoor Unit Clearances - Inches (mm) 8.5.2. -
Page 22: Refrigeration Pipe Work
9. Refrigeration Pipe Work 9.1. Single-Zone Refrigerant Cycle Diagram INDOOR OUTDOOR LIQUID SIDE CAPILIARY TUBE T5 - Discharge Temp Sensor (EVAPORATOR) T3 - Condenser Temp (CONDENSER) Sensor CN8 (T1) Room temp. sensor T4 - Ambient Temp Sensor CN9 (T2) Evaporator temp. -
Page 23: Outdoor Unit Connections And Line Set Usage
Table 4. Line Set Guide Each system size has a line set length and vertical elevation parameters. Maximum Line Set Diameters (in.) Maximum Elevation Elevation Maximum Line System Outdoor Unit BELOW Additional Refrigerant for greater Outdoor Unit Set Length - Size (KBtu) Indoor Unit - Feet than 20 Foot Line Set Length ABOVE Indoor Feet (Meters) Liquid... -
Page 24: Power And Communication Wiring For Systems
11. Power and Communication Wiring for 12. Outdoor Unit Diagrams Systems CAUTION BLACK BROWN This unit must be properly grounded and protected by a circuit breaker. The ground wire for the unit must not be Indoor Unit connected to a gas or water pipe, a lightning conductor or a telephone ground wire. Do not connect power wires to the outdoor unit un- til all other wiring and piping connections have been completed. -
Page 25: Installation Requirements
• Conduct a 30-minute evacuation. Check whether BLACK 3 the compound meter indicates - 0.1Mpa(14.5Psi). If BLUE the meter does not indicate -0.1Mpa (14.5Psi) after L1L2 30 minutes has elapsed, continue evacuation for 20 CN 6 CN 7 CN 8 CN 2 CN 3 more minutes. If the pressure does not reach - 0.1Mpa L1 L2 (14.5Psi) after 50 minutes has elapsed, check if there OUTDOOR are any leaks. MAIN • Fully close the Handle Lo valve of the manifold valve BLUE and turn off the vacuum pump. After five minutes, confirm that the gauge needle is not moving. BLACK • Turn the flare nut on the three-way valve 45° counter- COMPRESSOR clockwise for 6-7 seconds. Once gas begins to come out, tighten the flare nut. Make sure the pressure display on the pressure indicator is higher than CN 17 CN 414 atmospheric pressure. Then remove the charge hose from the three-way valve. -
Page 26: Servicing Indoor Unit Refrigeration Circuit
13.6.2. Air Purging with Vacuum Pump • Purge the air from the charge hose. • Open the valve at the bottom of the cylinder and press • Completely tighten the flare nuts of the indoor and the check valve on the charge set to purge the air (be outdoor units, confirm that both the two-way and three- careful of the liquid refrigerant). way valves are set to the closed position. • Place the charging cylinder onto the electronic scale • Connect the charge hose with the push pin of handle lo and record the weight. to the three-way valves gas service port. • Turn on the air conditioner in cooling mode. • Connect the charge hose of handle hi connection to the vacuum pump. • Open the valves (Low side)on the charge set and charge the system with liquid refrigerant. • Fully open the handle Lo of the manifold valve. • When the electronic scale displays the proper weight • Operate the vacuum pump to evacuate. (refer to the gauge and the pressure of the low side), • Make evacuation for 30 minutes and check whether the disconnect the charge hose from the three-way valve’s compound meter indicates - 0.1Mpa (500 microns). If service port immediately and turn off the air conditioner the meter does not indicate - 0.1Mpa (500 microbars) -
Page 27: Refrigerant Charging
13.7.2. Refrigerant Charging • Indoor fan standard working amp.: <1A • Outdoor fan standard working amp.: <1.5A. • Connect the charge hose to the charging cylinder, open the two-way valve and the three-way valve. • Four-way valve standard amp.: <1A • Connect the charge hose which you disconnected from 15. Adding Refrigerant - Single-Zone Systems the vacuum pump to the valve at the bottom of the The outdoor unit is factory-charged with refrigerant. Calculate cylinder. If the refrigerant is R-410A, make the cylinder the additional refrigerant required according to the diameter bottom up to ensure liquid charge. and the length of the liquid pipe between the outdoor unit and indoor unit connections. • Purge the air from the charge hose Be sure to add the proper amount of additional refrigerant. •... -
Page 28: Specifications And Operations
17. Specifications and Operations Table 7. Electronic Functions Abbreviations Indoor ambient temperature Coil temperature of indoor heat exchanger Pipe temperature of outdoor heat exchanger Outdoor ambient temperature Compressor discharge temperature Table 8. Electronic Control Working Environment Input voltage: 230V Input power frequency: 60Hz Indoor fan normal working amp. is less than 1A Outdoor fan normal working amp is less than 1.5A Four-way valve normal working amp is less than 1A Table 9. Main Protection Three minutes delay at restart for compressor One minute delay for the first time start-up and three minutes delay for others Temperature protection of compressor discharge When the compressor discharge is getting higher, the running frequency will be limited as below rules: If 215.6°F (102°C) < T5 < 244.4°F (115°C), decrease the frequency to the lower level every two minutes until to F1. If T5 < 244.4°F (115°C) for ten seconds, the compressor will stop and restart till T5 < 194°F (90°C) Table 10. Indoor/Outdoor Units Communication Protection If the indoor units cannot receive the feedback signal from the outdoor units for two minutes, the unit will stop and display failure. When T3>149°F (65°C) for three seconds, the compressor will stop while the indoor fan and outdoor fan will continue. -
Page 29: Cooling Chart
17.1. Cooling Chart Table 11. Cooling - Fahrenheit (Celsius) °F(°C) ODU(DB) IDU(DB/WB) (-17) (-15) (9.44) (7.22) (23.89) (29.44) (35) (40.56) (46.11) (48.89) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 17.2. Capacity Request Calculations Total capacity Request=Σ(Norm code × HP) /10× modify rate+ correction. T1 Ts Figure 26. Cooling Mode Capacity Area Norm Code (N) NOTE:... -
Page 30: Outdoor Fan Control
Outdoor Temperature (T4) >29°C 18°C to 29°C <17°C Cooling >84.2°F 64.4°F to 84.2°F <62.6°F Modify Rate 100% When there is more than one indoor unit: Outdoor Temperature (T4) >25°C 17°C - 25°C <17°C Cooling >77°F 62.6°F - 77°F <62.6°F Modify Rate 100% NOTE: The final result is integer. In low ambient cooling mode, modify rate is fixed as 40%. According to the final capacity request to confirm he operating frequency, as following table. COOL_ COOL_ COOL_ COOL_ Frequency (Hz) Amendatory capacity demand Meanwhile the maximum running frequency will be adjusted according to the outdoor ambient temp. 17.3. Outdoor Fan Control 17.3.1. - Page 31 Exit low ambient cooling mode run with high fan for 1 minute...
-
Page 32: Indoor And Outdoor Unit Disassembly
18. Indoor and Outdoor Unit Disassembly Step 3. Open the horizontal louver and push the hook towards left to open it. NOTE: This section is for reference only. Actual unit appearance may vary. 18.1. Indoor Unit (All Models) 18.1.1. Front Panel Step 1. Hold the front panel by the tabs on the both sides and lift it. Horizontal Louver Hook Step 4. Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver. - Page 33 Step 5. Step 8. Pry the electrical cover by a screw driver, and Open the screw cap and then remove the three rotate it towards left, then remove it. screws. Step 9. Release the hooks with hands. Step 6. Disconnect the connector for display board. Step 10. Release the five hooks in the back. Step 7. Slide the front panel side to side to release each axis. Hooks...
-
Page 34: Electrical Parts
Step 11. Pull out the panel frame while pushing the hook 18.1.2. Electrical Parts through a clearance between the panel frame NOTE: When handling electrical parts use anti-static and the heat exchanger. gloves. NOTE: Remove the front panel (see Step 1 on page 32) before disassembling electrical parts. Step 1. Cut the ribbon by a shear, then pull out the coil temperature sensor (T2). Step 2. Remove one fixing screw of the electronic control box and two screws used for the ground connection. Step 12. - Page 35 Step 4. Step 7. Remove the fixed devices of the connectors. Open the two clips on the front of the electric box. Step 8. Open the upper cover plate of electronic control box. Step 5. Disconnect the connectors of fan motor, the step motor and the T2 sensor. Step 9. Remove 1 screw and open the 2 clips along the direction indicated in image below. Step 6. Open the left side plate of electronic control box.
-
Page 36: Evaporator
Step 10. Pull out the electrical main board along the direction indicated in right image to remove it. Terminal S Display Screw Board RoomTemp Sensor Terminal 1L Terminal W Pipe Temp Sensor 18.1.3. Evaporator NOTE: Step 3. Remove the front panel and electrical parts (see Release the hook on the evaporator. both “Front Panel” on page 32 and “Electrical Parts”... -
Page 37: Fan Motor And Fan
Step 5. Step 3. Pull out the evaporator. Remove the fixing screw. Step 4. Pull out the fan motor and fan assembly from the side. Fixing Screw 18.1.4. Fan Motor and Fan 18.1.5. Step Motor NOTE: Remove the front panel and electrical parts NOTE: Remove the front panel and electrical parts (see (see “Front Panel” on page 32, “Electrical both “Front Panel”... -
Page 38: Outdoor Unit
Step 2. Pull up the drain hose to remove it. Top Cover 18.2. Outdoor Unit 18.2.1. Panel Plate (MWCA009S4, MWCA012S4 and MWCA018S4) Step 4. Remove the screws of the front panel and then Step 1. Turn off the air conditioner and the power remove the front panel. breaker. Step 2. Remove the screw of the big handle and then remove the handle. Front Panel Step 5. Remove the screw from the water collector cover. Water Collection Cover Step 3. Remove the screws of the top cover and then remove top cover. One of the screws is located underneath the big handle. -
Page 39: Panel Plate (Mwca024S4)
Step 6. Remove the screws on the rear coil guard and then remove the coil guard. Front Cover Step 7. Remove the screws from the right panel and then remove panel. Step 3. Remove the screws from the top cover and then remove. One of the screws is located underneath the handle. Top Cover Step 4. Remove the screws from the front panel and then remove panel. Right Panel 18.2.2. Panel Plate (MWCA024S4) Step 1. Turn off the air conditioner and the power breaker. Step 2. Remove the screws that secure the handle and then remove the handle. Front Panel... -
Page 40: Electronic Components (Mwca009S4 And Mwca012S4)
Step 5. Remove the screw securing the service valves temperature sensor (T4) and discharge cover and then remove. temperature sensor (TP). Step 4. Disconnect the expansion valve. Step 5. Remove electronic control box. 4-way valve (HP only) Service Valves Cover Fan Motor Compressor T3, T4 and TP Step 6. Remove the screws securing the right panel cover and remove panel. 18.2.4. Electronic Components (MWCA018S4) Step 1. Remove the connector for the compressor. Step 2. Pull out connectors for the condenser coil temperature sensor (T3), outdoor ambient temperature sensor (T4) and discharge temperature sensor (TP). -
Page 41: Fan Disassembly (Mwca009S4 And Mwca012S4)
Step 1. Remove the connector for the compressor. Step 2. Pull out the two blue wires connected to the expansion value (not applicable to AC units only) Step 3. Pull out connectors for the condenser coil temperature sensor (T3), outdoor ambient temperature sensor (T4) and discharge temperature sensor (TP). Step 4. Disconnect the expansion valve. Step 5. Remove electronic control box. 4-way valve Reactor Step 3. Release the hooks and then open the electronic control box cover. Fan Motor Compressor T3, T4 and TP Hook 18.2.6. Fan Disassembly (MWCA009S4 MWCA012S4) NOTE: Antistatic gloves must be worn when you dissemble the electronic box. -
Page 42: Fan Disassembly (Mwca018S4)
Step 5. Remove the screws securing the fan motor and then remove fan assembly. Fan Motor Step 4. Remove the screws securing the fan motor to body. Then remove fan motor. 18.2.8. Fan Disassembly (MWCA024S4) Step 1. Remove the nut security the fan with a spanner. 18.2.7. Fan Disassembly (MWCA018S4) Then remove the fan. Step 1. Remove the nut security the fan to the fan motor. D Cut Step 2. Remove the screws securing the cover of the Step 2. Release the hooks and then open the electronic electronic control box cover. control box cover. Step 3. Disconnect connector from electronic control Hook board plug. -
Page 43: Sound Blanket
Step 3. Disconnect the connector for the fan motor from compressor. the electronic control board. Sound Blanket Fan Motor Connector Sound Blanket (side) Step 4. Remove the screws securing the fan motor from body. Remove the fan. 18.2.10. Compressor NOTE: Recover refrigerant before removing compressor. Step 1. Remove the flange nut of the terminal cover and remove the cover. Fan Motor Terminal Cover 18.2.9. Sound Blanket NOTE: Recover refrigerant before removing... - Page 44 Step 2. Disconnect all connectors. Step 3. Remove the hex nuts and washers which are located on the bottom of the plate which are securing the compressor. Step 4. Heat up the brazed parts and then remove the discharge and suctions pipes. Step 5. Lift the compressor from the base pan assembly with pliers.
Need help?
Do you have a question about the MCA Series and is the answer not in the manual?
Questions and answers