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Midea MSV1-09HRFN1-MT0W User Manual

Midea MSV1-09HRFN1-MT0W
120 pages
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Revision A: 1305080001, Content updated.
Model Numbers:
MSV1-09HRFN1-MT0W MSV1-12HRFN1- MT0W
MSV1-12HRDN1-MQ0W MSV1-18HRDN1-MQ0W
MSV1-24HRDN1-MQ0W
VERTU MONO Split DC Inverter
Air Conditioner
SERVICE MANUAL
Mono DC
Table of Contents
1. Precaution
2. Part names and functions
3. Dimension
4. Refrigerant Cycle Diagram
5. Wiring Diagram
6. Installation Details
7. Operation Characteristics
8. Electronic function
9. Troubleshooting
10. Exploded view
11. Disassembly instructions
WARNING
Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments
Installation or repairs made by unqualified persons can result in hazards to you and others.
Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
This service is only for service engineer to use.

Questions and Answers:

Midea MSV1-09HRFN1-MT0W Specifications

General IconGeneral
BrandMidea
ModelMSV1-09HRFN1-MT0W
CategoryAir Conditioner
LanguageEnglish

Summary

Precaution

Safety Precaution

Instructions to prevent injury to the user and property damage during operation.

Warning

Critical warnings regarding installation, electrical work, and product handling.

Part Names And Functions

Model Names of Indoor/Outdoor units

Lists the model numbers for indoor and outdoor units based on capacity.

Part names of Indoor/Outdoor units

Diagrams illustrating the parts of the indoor and outdoor units.

Specification

Dimension

Indoor Unit

Detailed dimensions and diagrams for the indoor unit.

Outdoor Unit

Diagrams and clearance requirements for the outdoor unit installation.

Refrigerant Cycle Diagram

Wiring Diagram

Indoor Unit

Wiring diagrams for the indoor units of various models.

Outdoor Unit

Wiring diagrams for the outdoor units of various models.

Installation Details

Wrench torque sheet for installation

Specifies torque values for tightening pipe flare nuts during installation.

Connecting the cables

Guidelines for selecting appropriate AWG wire sizes for power connections.

Pipe length and the elevation

Table detailing pipe sizes, standard/max length, elevation, and refrigerant charge.

Installation for the first time

Procedures for leak testing and evacuation of the refrigerant system.

Adding the refrigerant after running the system for many years

Procedure for adding refrigerant to a system that has been in use for an extended period.

Re-installation while the indoor unit need to be repaired

Steps for collecting refrigerant and re-installing an indoor unit after repair.

Re-installation while the outdoor unit need to be repaired

Procedures for evacuating and charging refrigerant for outdoor unit re-installation.

Operation Characteristics

Electronic Function

Abbreviation

List of abbreviations used for temperature sensors (T1-T5) in the manual.

Display function

Explanation of icons and displays on the indoor unit's control panel.

Main Protection

Details various protection mechanisms for the compressor and unit operation.

Three Minutes Delay at restart for compressor

Specifies the delay time before the compressor restarts after power interruption.

Temperature protection of compressor top

Describes protection triggered by the compressor's top temperature.

Temperature protection of compressor discharge

Outlines how discharge temperature affects compressor frequency and operation.

Fan Speed is out of control

Protection mechanism when the indoor fan speed drops too low.

Inverter module Protection

Details protection functions for the inverter module concerning current, voltage, and temperature.

Indoor fan delayed open function

Describes the delayed operation of the indoor fan and anti-cold wind function.

Compressor preheating functions

Explains conditions and mode for compressor preheating to protect it in cold weather.

Zero crossing detection error protection

Protection against abnormal zero crossing signal intervals in AC detection.

Operation Modes and Functions

Details various operating modes and their specific functions.

Fan mode

Description of the fan-only mode operation, including fan speed and louver behavior.

Cooling Mode

Details compressor and fan running rules for cooling operations based on temperature.

Heating Mode

Details compressor and fan running rules for heating operations based on temperature.

Auto-mode

Explains how the unit automatically selects cooling, heating, or fan-only based on temperature.

Drying mode

Describes the drying mode operation, including fan speed and compressor rules.

Forced operation function

Instructions on how to enter and operate the unit in forced auto or forced cooling modes.

Timer function

Details the timer functions available for operating the air conditioner.

Sleep function mode

Explanation of the sleep mode operation, including temperature and fan speed adjustments.

Auto-Restart function

Describes the auto-restart feature that resumes previous settings after a power failure.

Automatic panel function

Explains the automatic opening and closing of the unit's front panel and louvers.

8℃ Heating(optional)

Details the optional 8°C heating function for maintaining room temperature in winter.

Troubleshooting

Indoor Unit Error Display

Table listing error codes displayed by the indoor unit and their descriptions.

Outdoor unit error display

Explanation of LED indicators on the outdoor unit PCB for error display.

Diagnosis and Solution

Diagnostic procedures and solutions for common error codes.

EEPROM parameter error diagnosis and solution(E0/E5)

Troubleshooting steps for EEPROM parameter errors (E0/E5) related to PCB communication.

Indoor / outdoor unit’s communication diagnosis and solution(E1)

Diagnosis and solution for communication errors between indoor and outdoor units (E1).

Zero crossing detection error diagnosis and solution(E2)

Troubleshooting for zero crossing detection errors (E2) related to abnormal signal intervals.

Fan speed has been out of control diagnosis and solution(E3/E7)

Steps to diagnose and resolve issues where fan speed is out of control (E3/E7).

Open circuit or short circuit of temperature sensor diagnosis and solution(E5/E6)

Troubleshooting for temperature sensor faults (E5/E6) due to open or short circuits.

IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)

Diagnosis and solutions for IPM or IGBT protection faults (P0).

Over voltage or too low voltage protection diagnosis and solution(P1)

Troubleshooting for over/under voltage protection issues (P1) in the unit.

High temperature protection of compressor top diagnosis and solution(P2)

Diagnosis and solutions for compressor top high-temperature protection (P2).

Inverter compressor drive error diagnosis and solution(P4)

Troubleshooting steps for inverter compressor drive errors (P4).

Main parts check

Temperature sensor checking

Procedure to check resistance values of various temperature sensors.

Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (℃--K)

Appendix 2 Temperature Sensor Resistance Value Table for T5 (℃--K)

Pressure On Service Port Cooling chart:

Heating Chart:

Exploded View(Version of 2013.05.08)

Indoor unit

Exploded view and parts list for the Midea indoor unit models.

Outdoor unit

Exploded view and parts list for outdoor units.

MOC-09HFN1-MTOW, MOC-12HFN1-MTOW

Parts list for MOC-09HFN1-MTOW and MOC-12HFN1-MTOW outdoor units.

MSV1-18HRDN1-MQ0W

Exploded view and parts list for MSV1-18HRDN1-MQ0W indoor unit.

MOC-12HDN1-MQ0W

Parts list for MOC-12HDN1-MQ0W outdoor unit.

MOF-18HDN1-MQ0W

Exploded view and parts list for MOF-18HDN1-MQ0W outdoor unit.

MOG-24HDN1-MQOW

Exploded view and parts list for MOG-24HDN1-MQOW outdoor unit.

Disassembly Instructions

Indoor unit

Step-by-step procedures for disassembling the indoor unit components.

Outdoor unit

Procedures for disassembling outdoor unit components.

MOC-09HFN1-MTOW, MOC-12HFN1-MTOW

Disassembly of panels and covers for MOC-09HFN1-MTOW/MTOW outdoor units.

MOF-18HDN1-MQ0W

Disassembly procedures for MOF-18HDN1-MQ0W outdoor unit panels.

MOG-24HDN1-MQOW

Disassembly procedures for MOG-24HDN1-MQOW outdoor unit panels.

MOG-24HDN1-MQOW

Disassembly procedures for MOG-24HDN1-MQOW outdoor unit panels.

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