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Midea MOB01-09HFN1-QRD0GW User Manual

Midea MOB01-09HFN1-QRD0GW
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Mission 3D Inverter Series
Service Manual 2014
MBSEU-A-1412
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Midea MOB01-09HFN1-QRD0GW Specifications

General IconGeneral
RefrigerantR410A
Cooling Capacity9000 BTU
TypePortable
Operating ModesFan
Included AccessoriesWindow kit

Summary

1. Precautionary Measures

1.1 Safety Precautions

General safety instructions to prevent injury and property damage.

1.2 Critical Warnings

Critical warnings regarding installation, electrical hazards, and product operation.

2. Product Functions

2.1 Model Name Identification

Lists indoor and outdoor unit models along with their respective capacities.

3. Dimensional Specifications

3.1 Indoor Unit Dimensions

Detailed physical dimensions for the indoor unit across different models.

3.2 Outdoor Unit Installation Clearances

4. Refrigerant Cycle Diagram

5. Installation Details

5.1 Wrench Torque Specifications

Recommended torque values for tightening pipe connections during installation.

5.2 Cable Connection Guidelines

Selection criteria for power cord cross-sectional area based on appliance current.

5.3 Pipe Length and Elevation Limits

5.4 First-Time Installation Procedures

5.4.1 Air Purging with Vacuum Pump

Procedure for system evacuation using a vacuum pump to remove air and moisture.

5.4.2 Air Purging Using Refrigerant

Method for purging air from the system using refrigerant.

5.5 Adding Refrigerant to Aged Systems

5.6 Re-installation After Indoor Unit Repair

5.6.1 Collecting Refrigerant to Outdoor Unit

Steps to recover refrigerant into the outdoor unit before indoor unit servicing.

5.6.2 Air Purging Post-Repair

Procedure for purging air after the indoor unit has been repaired.

5.7 Re-installation After Outdoor Unit Repair

5.7.1 System Evacuation Procedure

Process for evacuating the entire system before outdoor unit servicing.

5.7.2 Refrigerant Charging Process

Steps for recharging the system with refrigerant after outdoor unit repair.

6. Operation Characteristics

6.1 Operating Temperature Ranges

Defines the suitable room and outdoor temperature ranges for various operating modes.

7. Electronic Functions

7.1 Abbreviation Glossary

List of abbreviations used for sensors and system functions.

7.2.1 Indoor Display Icon Explanations

Explanation of icons shown on the indoor unit's display board.

Digital Display Functionality

Description of what the digital display shows in different operating states.

Optional Wi-Fi Display

Indicates the status and activation of the optional Wi-Fi control feature.

7.3 Main Protection Mechanisms

7.3.1 Compressor Restart Delay

Delay applied before the compressor restarts after a power interruption.

7.3.2 Compressor Top Temperature Protection

Protection against overheating of the compressor's top component.

7.3.3 Compressor Discharge Temperature Protection

Triggered when compressor discharge temperature exceeds a safe limit.

7.3.4 Fan Speed Control Failure

Protection activated if the indoor fan speed drops critically low.

7.3.5 Inverter Module Protection

Protective functions for the inverter module against electrical and thermal stress.

7.3.6 Delayed Indoor Fan Activation

The indoor fan activates after a short delay when the unit starts.

7.3.7 Compressor Preheating Functionality

Enables preheating of the compressor in cold ambient conditions.

7.3.8 Sensor Circuit Protection

Safeguards against open or short-circuited temperature sensors.

7.3.9 Refrigerant Leakage Detection

Detects refrigerant leaks during cooling operation to prevent damage.

7.4 Operation Modes and Functions

7.4.1 Fan Mode Operation

Details on how the fan operates independently or in conjunction with other modes.

7.4.2 Cooling Mode Operation

Explanation of the cooling mode, including compressor and fan control.

7.4.2.1 Compressor Running Rules

Conditions and rules governing the compressor's operation during cooling.

7.4.2.2 Outdoor Fan Speed Control

How outdoor fan speed is adjusted based on ambient temperature.

7.4.2.3 Indoor Fan Speed Control

Rules for indoor fan speed selection and operation in cooling mode.

7.4.2.4 Condenser Temperature Protection

Protection mechanism to prevent overheating of the condenser.

7.4.3 Heating Mode Operation

Detailed description of the heating mode, including compressor and fan control.

7.4.3.1 Compressor Running Rules

Conditions and rules governing the compressor's operation during heating.

7.4.3.2 Outdoor Fan Speed Control

How outdoor fan speed is adjusted based on ambient temperature in heating.

7.4.3.3 Indoor Fan Speed Control

Rules for indoor fan speed and anti-cold air function in heating mode.

7.4.3.4 Defrosting Mode Operation

Description of the defrosting cycle and its indicators.

7.4.3.5 Evaporator Coil Temperature Protection

Protection based on the evaporator coil's temperature.

7.4.4 Auto Mode Operation

Details on automatic mode selection based on temperature differences.

7.4.5 Drying Mode Operation

Characteristics of the drying mode, including fixed fan speed and louver angle.

7.4.6 Forced Operation Functions

Explanation of forced cooling and forced auto operation modes.

7.4.7 Auto-Restart Functionality

How the unit automatically resumes operation after a power interruption.

7.4.8 8°C Heating Mode (Optional)

Specific operational behavior of the 8°C heating feature.

8. Troubleshooting Guide

8.0.1 Capacitor Discharge Safety

Essential safety precaution for discharging electrical energy from capacitors.

8.1 Indoor Unit Error Display Codes

8.2.1 EEPROM Parameter Error Diagnosis

8.2.2 Communication Error Diagnosis (E1)

8.2.4 Fan Speed Out of Control Diagnosis (E3)

8.2.4 Refrigerant Leakage Detection Diagnosis (EC)

8.2.5 Temperature Sensor Fault Diagnosis (E5)

8.2.6 IPM Malfunction Diagnosis (P0)

8.2.7 Voltage Protection Diagnosis (P1)

8.2.8 Compressor Top Temperature Protection (P2)

8.2.9 Inverter Compressor Drive Error Diagnosis (P4)

Main Parts Check

1. Temperature Sensor Resistance Check

Procedure for measuring the resistance of various temperature sensors.

2. Compressor Winding Resistance Check

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