Mitsubishi Electronics MXZ-24UV - E2 service manual Trouble criterion of main parts

Page 27

12-4. Trouble criterion of main parts

Part name

 

 

 

 

Check method and criterion

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Defrost thermistor

Measure the resistance using a tester.

 

 

 

 

 

 

 

 

 

 

 

 

(Part temperature -10°C ~ 40°C)

 

 

 

 

 

 

 

 

 

 

 

 

Evaporation / Gas pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

temperature thermistor

 

 

 

Normal

 

 

 

 

 

abnormal

 

 

 

 

 

 

 

 

 

 

 

5kΩ ~ 55kΩ

 

 

 

Opened or short-circuited

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance using a tester, after warming up the thermistor by holding by hand.

Discharge temperature

(Part temperature : 20°C ~40°C)

 

 

 

 

 

 

 

 

 

 

 

 

thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal

 

 

 

 

 

abnormal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100kΩ ~ 250kΩ

 

 

 

Opened or short-circuited

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor

Measure the resistance between terminals using a tester.

 

 

 

 

 

 

 

 

W

(Winding temperature : -10°C ~ 40°C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

 

 

 

 

 

 

 

Normal

 

 

 

 

 

abnormal

 

 

 

 

 

 

U

 

1Each phase 0.53Ω ~ 0.66Ω

 

 

 

Opened or short-circuited

 

WHT

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor fan motor

Measure the resistance between lead wires using a tester.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

(Part temperature : -10°C ~ 40°C)

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ORN

 

 

 

 

Normal

 

 

 

 

 

 

 

abnormal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLU

 

WHT - BLK

 

 

69.0Ω ~ 86.0Ω

 

 

 

 

Opened or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YLW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK - YLW

 

 

23.0Ω ~ 30.0Ω

 

 

 

 

short-circuited

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

Protector specification

 

YLW - BLU

 

 

10.0Ω ~ 13.0Ω

 

 

 

 

(Not including

 

 

Short 95I15:￿

 

RED - BLK

 

 

73.0Ω ~ 91.0Ω

 

 

 

 

WHT - ORN)

 

 

Open

135I5:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance using a tester. (Part temperature -10°C ~ 40°C)

 

 

 

 

R. V. coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal

 

 

 

 

 

abnormal

 

 

 

 

 

 

 

 

 

 

1640Ω ~ 2310Ω

 

 

 

Opened or short-circuited

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Linear expansion valve

Measure the resistance using a tester.(Part temperature -10°C ~ 40°C)

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lead wire color

 

Normal

 

 

 

 

 

 

Abnormal

 

 

RED

 

 

LEV

 

WHT - RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ORN

 

 

 

 

 

RED - ORN

 

Ω

~ 52

Ω

 

Opened or short-circuited

 

 

 

 

 

 

 

 

YLW - BRN

 

43

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRN - BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YLW BRN BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance using a tester.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Part temperature -10°C ~ 40°C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure

 

 

 

 

 

 

Normal

abnormal

 

 

 

High pressure switch

 

 

 

 

Operation OFF

 

 

 

 

 

 

 

 

 

 

 

(HPS)

 

 

 

 

 

 

 

 

 

 

 

 

 

Short

 

 

 

 

 

 

 

 

HPS1

 

 

2.35 ± 0.15MPa (24 ± 1.5kg / cm2)

 

 

Other than

 

 

 

 

 

 

 

 

 

HPS2

 

 

2.55 ± 0.2MPa (26 ± 2kg / cm2)

 

 

 

those list-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ed at left

 

 

 

 

 

 

 

 

HPS1

 

 

2.75 +- 0.10.05 MPa (28 +- 1.00.5 kg / cm2)

 

 

Open

 

 

 

 

 

 

 

 

 

HPS2

 

+ 0

 

+ 0

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.43 - 0.15 MPa (35 - 1.5kg / cm )

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P Inner protector

27

Image 27
Contents MXZ-24UV E1 MXZ-24UV E2 ContentsMXZ-24UV E1 MXZ-24UV E2 Technical ChangesOutdoor Unit Part Names and FunctionsOutdoor Unit Indoor / Outdoor Correspondence Table07+07 Indoor Units Combination1930 7.2 470-2300 MXZ-24UV E1 , MXZ-24UV E2 SpecificationBand Center FREQUENCIES, Hz Test conditions Cooling DB35 WB24Heating DB 0dB =Unit mm Outlines and DimensionsSG79A845H01 Wiring DiagramUnitmm Refrigerant System DiagramCapacity and the Input Curves CWBCDB Class unit in single operation Capacity and input correction by inverter output frequencyHeat operation Or any button on remote controller33Hz Ambient temperature/ Ambient humidity% Ambient temperature33Hz CurrentOutdoor 45Hz 10 15 20 Microprocessor Control Inverter Multi System ControlSSR61 LEV control Correction Cool DRY HeatSuction superheat S.H LEV opening DRY Cool Operational frequency rangeMin Max Min Max RatedDischarge temperature protection control Heat defrosting controlHigh pressure protection Relation between main sensor and actuator Refrigerant recovery control on heatingOutdoor fan control Relation between main sensor and actuatorLead wiring Housing point Troubleshooting procedure TroubleshootingInstruction of troubleshooting Before troubleshooting, check the followingLEV Troubleshooting check tableOutdoor unit operates Trouble criterion of main parts Outdoor unit does not operate. LED display Outdoor unit does not operate. LED display display OFFWhen cooling operation does not work. Start When heating operation does not work. StartMinutes or more normal Relay P. C. board Power supply of outdoor unit wasTurned off, disconnect the connector Check the resistanceLED Return CN722 to former InfinityElectronic control P.C.board Test Point Diagram and Voltage MXZ-24UV E1 , MXZ-24UV E2Noise filter P.C.board MXZ-24UV E1 Outdoor FAN 230V AC Reversing Valve 230V ACMXZ-24UV E2 Relay P.C.board MXZ-24UV E1 MXZ-24UV E2 M P.C.board MXZ-24UV E1 MXZ-24UV E2Discharge pipe brazed part Suction pipe braxed part Disassembly InstructionsOutdoor Unit Operating Procedure Photos Removing the compressor Photo1Remove the screws of the top panel , and remove it.See 1Remove the service panel.See PhotoRemoving the fan motor Removing the 4-way valve PhotoRemoving the reactor Operating Procedure PhotosOutdoor Unit Functional Parts MXZ-24UV E1 Parts List6 7 Outdoor Unit Structural Parts MXZ-24UV E1Accessory Parts MXZ-24UV E1 MXZ-24UV E2 MXZ-24UV MXZ-24UV MAC-855SG51H-855 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.