Midea MPK-12ERN2

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Website: www.mideaaircon.com

Service manual

CAUTION

- BEFORE SERVICING THE UNIT, READ THE SAFETY

- PRECAUTIONS IN THIS MANUAL.

- ONLY FOR AUTHORIZED SERVICE PERSONNEL.

MODELS:

MPK-09CEN2 MPK-09CRN2 MPK-09EEN2 MPK-09ERN2

MPK-10CEN2 MPK-10CRN2 MPK-10EEN2 MPK-10ERN2

MPK-12CEN2 MPK-12CRN2 MPK-12EEN2 MPK-12ERN2

MPK-08CE MPK-08CR MPK-08EE MPK-08ER

MPK-09CE MPK-09CR MPK-09EE MPK-09ER

MPK-10CE MPK-10CR MPK-10EE MPK-10ER

MPK2-09CEN1-QB6 MPK2-09CRN1-QB6 MPK2-09EEN1-QB6 MPK2-09ERN1-QB6

MPK2-10CEN1-QB6 MPK2-10CRN1-QB6 MPK2-10EEN1-QB6 MPK2-10ERN1-QB6

MPK2-12CEN1-QB4 MPK2-12CRN1-QB4 MPK2-12EEN1-QB4 MPK2-12ERN1-QB4

Table of Contents

Questions and Answers:

C
Christina OrtizAug 18, 2025
Why is my Midea MPK-12ERN2 not cooling or heating?
- J
  Janet SimpsonAug 18, 2025
  If your Midea Air Conditioner isn't cooling or heating, begin by checking the voltage. Verify the wiring terminals are secure, repairing them if loose. Ensure the temperature and mode settings are correctly adjusted. Inspect the compressor, overload protector, and wiring for any damage, replacing if necessary. If the unit uses an electric heater, check for damage and replace if needed. Also, examine the overheat fuse and replace if it's damaged. Finally, check the voltage of the main PCB; if the unit fails in heating mode, replace the main PCB.
A
Angela KimAug 22, 2025
How to fix no power display on panel of Midea MPK-12ERN2 Air Conditioner?
- A
  Angela MyersAug 22, 2025
  If there is no power display on the panel or button failure on your Midea Air Conditioner, check the power supply to ensure it's providing power to the unit. Inspect the power cord for damage and correct if necessary. Check the resistance between the input/output lines on the transformer (discharge transformer before testing), and replace the transformer if either input/output is open or the transformer is damaged. Check the voltage on the display board, replace the display board if it is +5V else replace the main PCB.
M
Miranda VargasAug 25, 2025
What to do if Midea MPK-12ERN2 shows water full alarm?
- B
  Barbara BennettAug 26, 2025
  If you're getting a water full alarm on your Midea Air Conditioner, start by checking if the water tank is full and empty it if necessary. Inspect the water depth sensor and replace it if it has failed. Check the water pump and replace it if it's not working. If the water depth is overloaded in the chassis, drain the water by opening the drainage hose. Finally, inspect the water depth sensing structure and replace or realign it if it's faulty.
R
Rachel SmithAug 27, 2025
How to fix Midea MPK-12ERN2 Air Conditioner fan motor noise?
- N
  natashawilliamsAug 28, 2025
  If your Midea Air Conditioner's fan motor is making noise, the fan blower might be cracked, out of balance, or partially missing; replace it if any of these issues are present. Check for any loose screws and tighten them. If knocking sounds continue when the motor is running, or if the motor hums or the noise appears internal, the bearings may be worn; replace the motor in this case.
T
Todd AustinAug 31, 2025
What to do if compressor will not run while fan motor runs in Midea MPK-12ERN2 Air Conditioner?
- B
  Brandon EspinozaAug 31, 2025
  If the fan motor runs but the compressor won't start on your Midea Air Conditioner, start by checking the voltage. Inspect the wire connections and repair or replace any loose terminals. If wires are off, refer to the wiring diagram for proper placement. Check the voltage of the main PCB and replace it if open. Examine the capacitor and replace it if it's not within +/-10% of the manufacturer's rating or if it's shorted, open, or damaged. Ensure the room temperature setting is at the coolest setting in cooling mode or the warmest in heating mode. Finally, check the compressor for open circuits or grounding, and replace the compressor if necessary.
K
Kristina OwensSep 6, 2025
Why does my Midea MPK-12ERN2 Air Conditioner unit start and stop frequently?
- M
  Mark MataSep 6, 2025
  If your Midea Air Conditioner starts and stops frequently, the input power supply voltage may be too low. Check the voltage and call an electrician if it's not within limits. Inspect the main PCB and replace it if the compressor relay on the PCB is shorted or damaged. Also, when the room temperature is too high, the compressor will protect itself.
S
Steven WilliamsSep 9, 2025
Why does Midea Air Conditioner compressor stop instantly after startup?
- R
  Robert WhiteheadSep 9, 2025
  If the compressor on your Midea Air Conditioner stops instantly after startup, it could be due to too much refrigerant, causing the compressor load to be too high. Recycle and recharge the refrigerant after checking for the reason. Alternatively, the compressor might be blocked internally; replace it after investigating the cause.
C
Carolyn RhodesSep 12, 2025
Why does Midea MPK-12ERN2 fan motor run intermittently?
- J
  John JacksonSep 12, 2025
  If the fan motor on your Midea Air Conditioner runs intermittently, it may be cycling on overload. Check the voltage, and if it's not within limits, call an electrician. Test the capacitor and replace it if it's not within +/-10% of the manufacturer's rating. Check the bearings; if the blower wheel cannot rotate freely, replace the motor. If the speed does not change from high speed to low speed, replace the motor.

Midea MPK-12ERN2 Specifications

General

Brand	Midea
Model	MPK-12ERN2
Category	Air Conditioner
Language	English

Summary

Preface and Safety Information

Safety Precautions

Read safety precautions before servicing the unit to prevent shock hazards.

Insulation Resistance Test

Procedure for measuring insulation resistance to ensure electrical safety.

Product Features

Lists key features like water full alarm and anti-icing function.

Control Locations Overview

Identifies the location and function of control buttons on the unit.

Troubleshooting Guide

Refrigeration Cycle Diagram

Diagram illustrating the refrigerant flow for the air conditioner.

Electric Function Details

Covers working environment, symbols, and systematic functions.

Troubleshooting Common Problems

Lists common problems, their possible causes, and recommended remedies.

Wiring Diagrams

Wiring Diagram for Cooling Only Models

Wiring diagram specific to cooling-only air conditioner models.

Wiring Diagram for Cooling and Heating Models

Wiring diagram for air conditioners supporting cooling and heating.

Electrical Control Scheme

Schematic detailing the electrical control system of the unit.

Main Control Board Scheme

Diagram showing the layout and components of the main control board.

Display Board Scheme

Diagram illustrating the layout and components of the display board.

Unit Disassembly and Component Replacement

Prepare the Unit for Disassembly

Steps to prepare the unit for disassembly, including unplugging and draining.

Remove Rear Panel Screws

Instructions for removing screws securing the rear panel of the unit.

Disassemble Display Board Assembly

Guide to safely detach and remove the display board assembly.

Disassemble Front Panel

Steps to remove the front panel by unscrewing it.

Replace Main Control Board

Procedure for replacing the main control board, including wiring checks.

Replace Evaporator Fan Motor or Heater

Instructions for replacing the evaporator fan motor or electric heater.

Replace Condenser Fan Motor

Steps for removing and replacing the condenser fan motor assembly.

Repair Refrigerant System or Replace Compressor

Procedure for repairing the refrigerant system or replacing the compressor.

Repair Water Disposal System or Replace Pump

Guide to repairing the water disposal system or replacing the pump/switches.

Exploded View and Parts Information

Exploded View

Visual breakdown of the unit's components for identification.

Spare Parts List

List of available spare parts for the air conditioner unit.

Specifications

Technical specifications and performance data for the unit.

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