Mitsubishi Electronics MXZ-24UV - E2 service manual Infinity, Return CN722 to former

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• When the operation frequency does not go up from lowest frequency.

H Check of HPS

Start

1.Disconnect the connector CN722 in the electronic control P. C. board.

2.Check the resistance of HPS after 1 minutes have passed since the outdoor unit power supply was turnd off.

Check the resistance between

Infinity

each terminal?

Replace HPS (63H1).

 

0"

 

Return CN722 to former.

Turn on power supply to the indoor and outdoor unit. 3 minutes lator, EMERGENCY OPERATION starts.

Yes

Is HPS protection displayed

No

immediately after compressor Replace the electronic control P. C. board. starts.

Yes

Normal

I The other cases

In the case that the indoor fan and outdoor fan operate but the compressor does not operate, it causes that the high pressure switch can be operated once.

First of all, check the high pressure switch can be shorted, turn OFF the power and turn ON again 1 minute later. Indoor unit dose not operate. (difference modes)

When you try to run two indoor unit simultaneously, one for cooling and the other for heating, the unit which transmits signal to the outdoor units earlier decides the operation mode. The other unit indicates as shown in the figure below.

When the above situation occurs, set all the indoor units to the same mode, turn OFF the indoor units, and then turn them back ON.

Though the top of the indoor unit sometimes gets warm, this does not mean malfunction. The reason is that the refrigerant gas continuously flows into the indoor unit even while it is not operating.

OPERATION INDICATOR

Lighting

Flashing

32

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Contents Contents MXZ-24UV E1 MXZ-24UV E2Technical Changes MXZ-24UV E1 MXZ-24UV E2Part Names and Functions Outdoor UnitIndoor / Outdoor Correspondence Table Outdoor UnitIndoor Units Combination 07+071930 7.2 470-2300 Specification MXZ-24UV E1 , MXZ-24UV E2Test conditions Cooling DB35 WB24 Heating DB0dB = Band Center FREQUENCIES, HzOutlines and Dimensions Unit mmWiring Diagram SG79A845H01Refrigerant System Diagram UnitmmCDB Capacity and the Input CurvesCWB Capacity and input correction by inverter output frequency Class unit in single operationOr any button on remote controller 33Hz Ambient temperature/ Ambient humidity%Ambient temperature Heat operationCurrent 33HzOutdoor 45Hz 10 15 20 SSR61 Microprocessor ControlInverter Multi System Control LEV control Suction superheat S.H LEV opening CorrectionCool DRY Heat Operational frequency range Min MaxMin Max Rated DRY CoolHigh pressure protection Discharge temperature protection controlHeat defrosting control Refrigerant recovery control on heating Outdoor fan controlRelation between main sensor and actuator Relation between main sensor and actuatorTroubleshooting Instruction of troubleshootingBefore troubleshooting, check the following Lead wiring Housing point Troubleshooting procedureTroubleshooting check table LEVOutdoor unit operates Trouble criterion of main parts Outdoor unit does not operate. LED display display OFF Outdoor unit does not operate. LED displayWhen heating operation does not work. Start When cooling operation does not work. StartPower supply of outdoor unit was Turned off, disconnect the connectorCheck the resistance Minutes or more normal Relay P. C. boardLED Infinity Return CN722 to formerTest Point Diagram and Voltage MXZ-24UV E1 , MXZ-24UV E2 Electronic control P.C.boardMXZ-24UV E2 Noise filter P.C.board MXZ-24UV E1Outdoor FAN 230V AC Reversing Valve 230V AC M P.C.board MXZ-24UV E1 MXZ-24UV E2 Relay P.C.board MXZ-24UV E1 MXZ-24UV E2Disassembly Instructions Outdoor Unit Operating Procedure PhotosRemoving the compressor Photo Discharge pipe brazed part Suction pipe braxed part1Remove the service panel.See Photo Removing the fan motorRemoving the 4-way valve Photo 1Remove the screws of the top panel , and remove it.SeeOperating Procedure Photos Removing the reactorParts List Outdoor Unit Functional Parts MXZ-24UV E1Outdoor Unit Structural Parts MXZ-24UV E1 6 7Accessory Parts MXZ-24UV E1 MXZ-24UV E2 51H-855 MXZ-24UVMXZ-24UV MAC-855SG Page Made in Japan

MXZ-24UV - E2, MXZ-24UV specifications

Mitsubishi Electronics has established itself as a leader in the HVAC (heating, ventilation, and air conditioning) industry with its MXZ-24UV and MXZ-24UV - E2 models. These multi-zone heat pump systems are designed to provide exceptional efficiency, comfort, and versatility for residential and commercial applications.

One of the main features of the MXZ-24UV is its ability to effectively cool and heat multiple rooms simultaneously. This system allows for the connection of up to four indoor units, enabling users to customize the climate in different spaces while maintaining energy efficiency. This zoning capability ensures you can maintain the perfect temperature in each room according to the occupants' preferences.

The MXZ-24UV incorporates advanced inverter technology, which allows the compressor to adjust its speed based on the required heating or cooling demand. This results in reduced energy consumption compared to conventional systems, providing significant savings on energy bills while also promoting a more consistent indoor temperature. The inverter-driven compressor operates quietly and efficiently, making it a suitable choice for residential areas.

Additionally, these models are equipped with a range of smart technologies. The built-in Wi-Fi capability allows homeowners to control the system remotely using a smartphone or tablet. This feature adds convenience and flexibility, enabling users to adjust settings from anywhere, ensuring their space is at the desired temperature upon arrival.

Durability is another essential characteristic of the MXZ-24UV and MXZ-24UV - E2 models. Mitsubishi has designed these units to withstand various weather conditions, enhancing longevity and reliability. The units feature a robust construction that minimizes wear and tear while ensuring dependable performance year after year.

Moreover, the system has a variety of indoor unit options, including wall-mounted, ceiling-mounted, and floor-mounted designs. This versatility makes it easy to integrate into different architectural styles and preferences, ensuring both aesthetics and functionality.

In summary, the Mitsubishi Electronics MXZ-24UV and MXZ-24UV - E2 models are designed for those seeking energy efficiency, flexibility, and durability in a multi-zone heating and cooling system. With advanced inverter technology, smart home capabilities, and a range of indoor unit styles, these systems offer exceptional comfort while minimizing energy costs, making them a top choice in the HVAC market.