MrCool Universal MDU18048060 Owner's Manual

Dc inverter/condenser

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Please read this manual carefully before installation and keep it for future reference.

Owner's Manual

Universal

Series

DC Inverter / Condenser

MDUO18048060

Thank you for choosing MRCOOL

. Please read this manual carefully before installation and keep it for future reference.

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Jerry R Waters

June 13, 2025

MY 5 TON OUTSIDE UNIT DOESN'T COOL changed control board no errors are they a reset

Summary of Contents for MrCool Universal MDU18048060

Page 1 Please read this manual carefully before installation and keep it for future reference. Owner’s Manual Universal Series ® DC Inverter / Condenser MDUO18048060 Thank you for choosing MRCOOL . Please read this manual carefully before installation and keep it for future reference. ® Copyright © 2020 MRCOOL, LLC | v11.2.2020...
Page 2: Table Of Contents
Post Installation Checks ... 31 ....... Maintenance 1. Troubleshooting ........34 2. Error Codes ..........35 3. Unit Maintenance ........36 4. Notice on Maintenance ......38 5. After Sales Services ......... 41 EU Disposal Guidelines ..42 Page 1 mrcool.com...
Page 3: Safety Precautions
CEC (by authorized personnel only.) Contact an authorized service technician for repair or maintenance of the unit. Only use the included accessories and speciﬁed parts for installation. Using non-standard parts can cause water leakage, electric shock, or ﬁre and may cause the unit to fail. mrcool.com Page 2...
Page 4 Product uninstallation and recycling must be performed by a certiﬁed technician. If the system has a leak-detection system installed, it should be checked for leaks at least every 12 months. Keep a record of all leak checks for the lifetime of the unit. mrcool.com Page 3...
Page 5 Before operating the unit under low temperature, connect it to power for 8 hours. If it is deactivated for a short time, for example, one night, do not cut oﬀ the power (this is to protect the compressor). mrcool.com Page 4...
Page 6: Appliance Overview
5. For technical assistance, please contact MRCOOL technical support at (270) 366-0457. ® 6. When the product is malfunctioning and/or is inoperable, please contact MRCOOL technical support at the ® aforementioned number, as soon as possible and provide the following information: a.
Page 7: Accessories
® No-Vac ® Quick Connect Lineset Gas / Liquid Pipe Assembly Liquid Side Stub Kit To connect the unit with the liquid pipe Gas Side Stub Kit To connect the unit with the gas pipe Fig. 1.1 mrcool.com Page 6...
Page 8: Operating Range
Width (A / D) Depth (B / E) 42-3/4 / 24-1/2 in. 16-7/8 / 15-1/2 in. 42-3/4 x 53-3/4 x 14-1/2 in. MDUO18048060 1085 / 620 mm 427 / 395 mm 1085 x 1365 x 370 mm mrcool.com Page 7...
Page 9: Unit Installation
Unit is able to be shielded from strong wind. Strong wind may aﬀect the outdoor fan and lead to insuﬃcient air ﬂow volume, thus aﬀecting performance. Unit is away from objects which can generate or amplify noise during operation. Condensate can be safely drained from the unit. mrcool.com Page 8...
Page 10 ≤ H 250mm 2000mm 1000mm > H Prohibited B,D,E ≥ 3.94” ≥ 78.74” ≥ 39.37” ≤ 100mm 2000mm 1000mm ≥ 7.87” ≥ 78.74” ≥ 39.37” H < H ≤ H > H 200mm 2000mm 1000mm > H Prohibited mrcool.com Page 9...
Page 11 ≤ H 2500mm 1000mm 300mm > H Prohibited B,D,E ≥ 9.84” ≥ 98.43” ≥ 39.37” ≤ 250mm 2500mm 1000mm ≥ 11.81” ≥ 98.43” ≥ 39.37” > H H < H ≤ H 300mm 2500mm 1000mm > H Prohibited mrcool.com Page 10...
Page 12 200mm 200mm ≥ 7.874” 2000mm ≥ 15.75” 400mm ≥ 15.75” 400mm ≥ 23.62” 600mm Fig. 2.3 inches (”) millimeters (mm) ≤ b ≥ 9.84” 250mm H < H ≤ H b ≥ 11.81” 300mm > H Prohibited mrcool.com Page 11...
Page 13 For installation of multiple condensers on a vertical face refer to ﬁg 2.4 below: ≥ 15.75” 400mm ≥ 19.69” 500mm WALL ≥ 7.874” 2000mm Fig. 2.4 ≥ 15.75” ≥ 15.75” 400mm 400mm ≥ 19.69” ≥ 19.69” 500mm 500mm ≥ 11.81” 300mm mrcool.com Page 12...
Page 14: Outdoor Installation
Then, connect the drain hose to the drainage connector. If the drainage connector is used, the outdoor unit should be at least 10cm from the ground. Plugs and drainage connector are not recommended if there is an electrical heater on the chassis. Refer to Fig. 2.5 for details. Fig. 2.5 mrcool.com Page 13...
Page 15: Conventional Line Set Installation
Be extremely careful not to dent or damage the piping while bending them away from the unit. Any dents in the piping will aﬀect the unit’s performance. For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 14...
Page 16 Fig. 2.8 Fig. 2.8 Inches Inches Inches ≥1 ≥26 ≥5.91 ≤150 ≥1.3 ≥33 ≥5.91 ≤150 ≤150 ≥1.34 ≥34 ≥5.91 For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 15...
Page 17 3. After removing burrs from cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe. Fig. 2.10 For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 16...
Page 18 ﬂaring. Fig. 2.13 PIPING EXTENSION BEYOND FLARE FORM Flare form A = ~1/16” (1.6mm) Pipe Fig. 2.14 For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 17...
Page 19 Unit Installation Conventional Line Set Installation Replacement Condenser Only Existing Air Handler Fig. 2.15 MRCOOL® Universal® Series DC Inverter Existing Air Handler in house must be 410 air handler and 410 TXV Bio ow valve must have 410 Accessory copper...
Page 20 Cutter bending, place the insulation back on the pipe and secure it with adhesive tape. Cut line Fig. 2.18 For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 19...
Page 21 You must not exceed torque requirements shown in the table. Ф5/8” | Ф15.9 60-65 Ф3/4” | Ф19 70-75 Ф7/8” | Ф22.2 80-85 For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 20...
Page 22 Refer to Fig. 2.20 For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 21...
Page 23 Line Length Requiring No Added Charge MDUO18048060 24.6 feet | 7.5m ≤31.2 feet | ≤9.5m 0.32 oz/ft 30 g/m For installation with a No-Vac® Quick Connect® Line Set, refer to the next section starting on page 23 mrcool.com Page 22...
Page 24: Vac ® Quick Connect ® Installation
37 ft/lb Air Handler 52 ft/lb 3/8” 37 ft/lb 3/8” 3/4” 52 ft/lb 3/4” MRCOOL®Universal Series DC Inverter Open the stop valve only after connecting the refrigerate lines Connect using precharged A-coil Precharged line set with quick connect with 410 Refrigerate ttings in length 15, 25, 35, 50 feet ⱡFailure to follow the instructions provided could result in severe harm to you, this product, or other property.
Page 25: Installation Of Drain Pipe
Bend returning to the interior. Wind the insulating tape from bottom to top. The entire lineset, including drain pipe should be supported and ﬁxed onto the wall with saddles. Trap Fig. 2.22 mrcool.com Page 24...
Page 26: Condenser Field Conversion
Fig. 2.24 DEFAULT 5 TON Fig. 2.25 4 TON SETTING NOTE Refer to the Universal® Air Handler Installation Manual for Dip Swith Instructions and settings to convert the Universal® Air Handler from 5 ton to 4 ton. mrcool.com Page 25...
Page 27: Electrical Connection
Screws must be tightened up. Slipped screws must be replaced by specialized ﬂat-head screws. The wire gauge of power cord should be suﬃciently large. Damaged power cord or other wires must be replaced by specialized wires. Wiring work must be done according to national wiring rules and regulations. mrcool.com Page 26...
Page 28 Use a round terminal fastener or clamp to ﬁx the round terminal ﬁrmly on the peeled wire end. Locate the round terminal conduit. Use a screwdriver to replace it and tighten up the terminal screw (as shown in Fig. 2.27). A. Solid Wire B. Braided Wire Solderless Terminal Fig. 2.26 Jacket / Insulation mrcool.com Page 27...
Page 29 Screw with Special Fastener Round Terminal Fig. 2.27 Terminal Board Wire For all terminal wiring ( Refer to Fig. 2.28 Lead the thermostat wires and power cord through the insulation tube (as shown in Fig. 2.28). Fig. 2.28 mrcool.com Page 28...
Page 30 To a contact to control the auxiliary heater 1 Outdoor 24 Volt Emergency (hot) Unit 24 Volt (Common) Fig. 2.29-A To a AC contact to control the indoor unit fan mrcool.com Page 29...
Page 31 The temperature thermostat wire should also be laid along with the right side plate but away from the power cord. Electrical wiring of Single-phase unit: MDUO18048060 Fig. 2.29-B Fig. 2.30 mrcool.com Page 30...
Page 32: Post Installation Checks
Is there any obstacle blocking the air Cooling capacity may become inlet and outlet of the units? unsatisfactory. Have you recorded the length of The refrigerant charging amount can’t be refrigerant pipe and the refrigerant controlled. charging amount? mrcool.com Page 31...
Page 33 If the outside temperature is more than 86°F(30°C), heating mode can’t be enabled. Make sure the units can run normally. If there are any loud and/or abnormal sounds contact MRCOOL®Tech Support immediately. NOTICE: If nothing is displayed on the thermostat, check the wiring.
Page 34: Maintenance
Too many heat sources in the room. Remove unnecessary heat sources. Filter is blocked or dirty. Have a professional clean the lter. Air inlet and outlet of the units have Clear the obstacles and keep the area been blocked. well ventilated. mrcool.com Page 33...
Page 35: Troubleshooting
NOTICE Check the above items and take appropriate corrective measures. If the air conditioner continues improper function, please turn oﬀ the air conditioner immediately and contact MRCOOL® or your installing dealer. mrcool.com Page 34...
Page 36: Error Codes
WARNING When abnormalities occur, stop the unit immediately and disconnect power. Contact MRCOOL. If the unit continues to run abnormally, it may damage the unit and cause an electric shock or a ﬁre hazard. DO NOT attempt repairs to the appliance yourself. Improper repair and maintenance can create electric shock and ﬁre hazards.
Page 37: Unit Maintenance
4) Do not use organic solvent to clean the air conditioner. 5) If you need to replace a component, contact a professional to repair the unit with a component supplied by MRCOOL® to ensure the quality. 6) Improper operation may damage the unit, causing electric shock or re.
Page 38 “ON” status at least 8 hours prior to operation to preheat the crankcase on the compressor. 5) Check that the outdoor unit is ﬁrmly secured; 6) If problems are detected, contact your local service professional or MRCOOL ® Post-Season Maintenance Check List 1) Deactivate the main power to the air conditioner;...
Page 39: Notice On Maintenance
Refrigeration Equipment Checks Ensure all electrical components are compatible with the product and built to the correct speciﬁcations. Follow manufacturer maintenance and service guidelines at all times. When in doubt, consult MRCOOL ’s technical department for assistance. ® If using ﬂammable refrigerants, conduct the following checks: 1) Ensure ventilation machinery and outlets are operating adequately and are not obstructed;...
Page 40 ﬂammable atmosphere. The test apparatus must be at the correct rating. 3) Replace components only with parts speciﬁed by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak. mrcool.com Page 39...
Page 41 3) Make sure that cylinder is situated on the scales before recovery takes place. 4) Start the recovery machine and operate in accordance with manufacturer's instructions. 5) Do not overﬁll cylinders. No more than 80% volume liquid charge. mrcool.com Page 40...
Page 42: After Sales Services
When oil is drained from a system, it shall be carried out safely. After-Sales Services Any quality or other issues encountered in the purchased air conditioner, please contact the local MRCOOL ® after-sales service department.
Page 43: Eu Disposal Guidelines
Sell the appliance to certiﬁed scrap metal dealers. Special notice Disposing of this appliance in the forest or other natural surroundings endangers your health and is bad for the environment. Hazardous substances may leak into the ground water and enter the food chain. mrcool.com Page 42...
Page 44 ELECTRICIAN and/or HVAC TECHNICIAN: LICENSE #: INSTALLATION DATE: INSTALLATION LOCATION: SERIAL NUMBER: The design and speciﬁcations of this product and/or manual are subject to change without prior notice. Consult with the sales agency or manufacturer for details. Copyright © 2020 MRCOOL®, LLC...

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MrCool Universal MDU18048060 Owner's Manual

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