Midea MSMABU-09HRDN8-QRD0GW User Manual

 Maintenance 3 
Procedure:
1. Tighten the flare nuts of the indoor and outdoor
units, and confirm that both the 2- and 3-way valves
are closed.
2. Connect the charge hose with the push pin of Handle
Lo to the gas service port of the 3-way valve.
3. Connect another charge hose to the vacuum pump.
4. Fully open the Handle Lo manifold valve.
5. Using the vacuum pump, evacuate the system for
30 minutes.
a. Check whether the compound meter indicates
-0.1 MPa (14.5 Psi).
• If the meter does not indicate -0.1 MPa
(14.5 Psi) after 30 minutes, continue
evacuating for an additional 20 minutes.
• If the pressure does not achieve -0.1 MPa
(14.5 Psi) after 50 minutes, check for leakage.
• If the pressure successfully reaches -0.1 MPa
(14.5 Psi), fully close the Handle Lo valve, then
cease vacuum pump operations.
b. Wait for 5 minutes then check whether the gauge
needle moves after turning off the vacuum pump.
If the gauge needle moves backward, check
wether there is gas leakage.
6. Loosen the flare nut of the 3-way valve for 6 or
7 seconds and then tighten the flare nut again.
a. Confirm the pressure display in the pressure
indicator is slightly higher than the atmospheric
pressure.
b. Remove the charge hose from the 3-way valve.
7. Fully open the 2- and 3-way valves and tighten the
cap of the 2- and 3-way valves.

Midea MSMABU-09HRDN8-QRD0GW Specifications

General

Refrigerant	R32
Inverter Technology	Yes
Power Supply	220-240V/50Hz/1Ph
Energy Efficiency Ratio (EER)	3.21
Coefficient of Performance (COP)	3.61
Cooling Capacity	9000 BTU

Summary

Safety Precautions

Precautions

General guidelines to prevent injury and damage during operation and maintenance.

Information servicing(For flammable materials)

Guidelines for safe handling of flammable refrigerants during service procedures.

Product Features

Safety Features

Details the built-in safety mechanisms and operational protections of the air conditioner.

Maintenance

First Time Installation Check

Refrigerant Recharge

Step-by-step instructions for adding the correct amount of refrigerant.

Indoor Unit Disassembly

Outdoor Unit Disassembly

Electrical Parts

Four-way valve

Compressor

Steps for safely removing the compressor from the outdoor unit.

Troubleshooting

Safety Caution

Essential warnings before performing any troubleshooting or maintenance procedures.

General Troubleshooting

Table of common error codes, display information, and their solutions.

Error Diagnosis and Troubleshooting Without Error Code

Common problems and their solutions when no specific error code is displayed.

Quick Maintenance by Error Code

Guides part replacement based on specific error codes for faster repairs.

Troubleshooting by Error Code

Detailed diagnosis and solutions for specific error codes (TS01-TS08).

Check Procedures

Guides for checking temperature sensors and compressor windings resistance.