Midea MCD-18HRFN1-QRC8 - User Manual

Super Slim Cassette Type
Indoor Units 7
Super Slim Cassette Type
V2MC
1. Features ............................................................................... 8
2. Dimensions ........................................................................ 12
3. Service Space .................................................................... 13
4. Wiring Diagrams................................................................ 14
5. Electric Characteristics .................................................... 15
6. Sound Levels ..................................................................... 16
7. Accessories ....................................................................... 17
8. The Specification of Power .............................................. 18
9. Field Wiring ....................................................................... 19

Midea MCD-18HRFN1-QRC8 Specifications

General

Brand	Midea
Model	MCD-18HRFN1-QRC8
Category	Air Conditioner
Language	English

Summary

Dimensions

Dimensions

Dimensions for models MOU-36HFN1-QRC8 and MOU-36HFN1-RRC8.

Service Space

Service Space

Clearance requirements for air inlet, outlet, and maintain channel.

Wiring Diagrams

Wiring Diagrams

Wiring diagrams for 18K/24K/30K and 36K models.

Electric Characteristics

Electric Characteristics

Electrical specifications (Hz, Voltage, Min, Max) for outdoor units.

The Specification of Power

The Specification of Power

Power, wiring, and circuit breaker specs for 12000 and 18000 Btu/h.

Field Wiring

Field Wiring

Field wiring diagrams for MFAU-12HRFN1-QRC8 and MFA-16HRFN1-QRC8.

Piping Diagrams

Piping Diagrams

Piping diagrams for 12K/24K/30K and 36K models.

Operation Limits

Operation Limits

Operating temperature ranges for cooling and heating modes.

Installation Procedure

Installation Procedure

Step-by-step flowchart for the entire installation process.

Location selection

Indoor unit location selection

Guidelines for selecting the indoor unit mounting location.

Outdoor unit location selection

Guidelines for selecting the outdoor unit installation location.

Indoor unit installation

Super slim cassette indoor unit installation

Installation steps for super slim cassette indoor units.

A5 duct indoor unit installation

Installation guide for A5 duct indoor units.

Ceiling & floor indoor unit installation

Installation guide for Ceiling & Floor indoor units.

Compact cassette indoor unit installation

Installation guide for compact cassette indoor units.

Install the pendant bolt

Procedure for installing pendant bolts for compact cassette units.

Install the panel

Instructions for installing the panel of compact cassette units.

Console indoor unit installation

Installation guide for console indoor units.

Service space for indoor unit

Service space for console indoor units.

Install the main body

Steps for mounting the main body of console units.

Outdoor unit installation (Side Discharge Unit)

Service space for outdoor unit

Clearance requirements for side discharge outdoor units.

Install the Unit

Instructions for lifting and installing the outdoor unit.

Refrigerant pipe installation

Maximum pipe length and height drop

Max allowed pipe length and height drop for different capacities.

The procedure of connecting pipes

Steps for selecting pipe size, cutting, and flaring.

Flare the pipe

Detailed guide on flaring pipes, including dimensions and shapes.

Connect the pipe to indoor unit and outdoor unit by using two spanners.

Instructions for connecting pipes with correct torque.

Drainage pipe installation

Installation principle

Basic principles for drainage pipe installation.

Key points of drainage water pipe installation

Important considerations for drainage pipe installation.

Drainage pipe selection

How to select the correct drainage pipe diameter.

Lifting pipe setting of indoor unit with water pump

Setting lifting pipes for units with water pumps.

Drainage test

Procedures for drainage system tests.

Water leakage test

Performing a water leakage test on the drainage system.

Water discharge test

Conducting a water discharge test for drainage pumps.

Vacuum Drying and Leakage Checking

Purpose of vacuum drying

Reasons for vacuum drying to prevent ice-blockage and oxidation.

Operation procedure for vacuum drying

Step-by-step guide for vacuum drying.

Additional refrigerant charge

Additional refrigerant charge

Calculations and safety precautions for refrigerant charging.

Engineering of insulation

Insulation of refrigerant pipe

Steps and purpose for insulating refrigerant pipes.

Engineering of electrical wiring

Highlights of electrical wiring installation

Key considerations for field wiring installation.

Test operation

The test operation must be carried out after the entire installation has been completed.

Timing and requirement for test operation.

Please confirm the following points before the test operation.

Checklist of items to verify before test operation.

Test operation

Performing test operation checks on indoor and outdoor units.

Electrical Control Function

Main Protection

Main protection features for the unit.

Temperature protection of compressor top

Protection against compressor top overheating.

Temperature protection of compressor discharge

Protection based on compressor discharge temperature.

Fan Speed is out of control(for units used DC motor)

Measures for when fan speed is out of control.

Operation Modes and Functions

Cooling Mode

Evaporator low temperature T2 protection.

Protection against low evaporator coil temperature.

Condenser high temperature T3 protection

Protection against high condenser coil temperature.

High evaporator coil temp.T2 protection:

Protection for high evaporator coil temperature.

Drain pump control (For Duct & Cassette)

Troubleshooting

Indoor unit malfunction

Malfunctions and error codes for indoor units.

For Console(12 K)

Malfunctions and indicators for Console (12K).

For console type(18 K)

Malfunctions and indicators for Console (18K).

For Compact cassette(12 K) A5(12 K):

Malfunctions and indicators for Compact cassette/A5 units.

Outdoor current protection

Troubleshooting for outdoor current protection issues.

Inverter compressor drive error

Indoor fan Speed has been out of control.

For other models:

18~36 k

Solving steps for typical malfunction

For the indoor unit

Open or short circuit of temperature sensor

Outdoor unit malfunction

Indoor EEPROM malfunction

Full-water malfunction

Indoor fan speed has been out of control.

Refrigerant Leakage Detection

For the super-slim cassette with up-down panel

Communication error between indoor unit and up-down panel

Up-down panel is defective

Up-down panel is not closed

For the unit with TWINS function(For the super-slim cassette & A5 duct)

Communication malfunction between master unit and indoor unit

Other malfunction between master unit and indoor unit

For the outdoor unit

E0 malfunction

E2 malfunction

E3 malfunction

E4 malfunction

E5 malfunction (For single phase units)

E5 malfunction (For three phases units)

E6 malfunction (Only for MOU-36 HFN1-QRC4,MOU-36 HFN1-QRC8)

E8 malfunction

P0 malfunction

P1 malfunction (For 36 k models)

P2 malfunction (For 36 k models)

P3 malfunction

P4 malfunction

P5 malfunction

P6 malfunction (For single phase units)

P6 malfunction (For three phases units)

P7 malfunction

Controller

Wireless Remote Controller

RG51 Q1;BGE

Buttons and functions

RG51 C;E

R51 D;(C)E

Introduction of Function Buttons on the Remote Controller

Wired Remote Controller

KJR-10 B

Name and function of LCD on the wire controller

Installation