Midea V6 Series User Manual

V6 VRF 50Hz
128
Midea V6 Series Service Manual
Procedure 2.25.5
PL / C7
The inverter module heat sink is blocked
or dirty
Yes
Clean or replace the heat sink
No
The screws connecting the heat sink to
the inverter module are loose
Yes
Tighten the screws and make sure the
heat sink is well-connected
No
Inverter module temperature sensor
connection on main PCB is loose
1
Yes
Ensure the sensor is connected properly
No
Inverter module temperature sensor has
short circuited or failed
2
Yes
Replace the sensor
No
Replace outdoor main PCB
Notes:
1. Inverter module temperature sensor connection is port CN3 and CN3_1 on the main PCB (labeled 5 and 6, respectively, in Figure 5-2.1 in Part 5, 2.1
“Ports”).
2. Measure sensor resistance. If the resistance is too low, the sensor has short-circuited. If the resistance is not consistent with the sensor’s resistance
characteristics table, the sensor has failed. Refer to Table 6-3.3 in Part 6, 3.1 “Temperature Sensor Resistance Characteristics”.

Midea V6 Series Specifications

General

Brand	Midea
Model	V6 Series
Category	Air Conditioner
Language	English

Summary

Part 2 Component Layout and Refrigerant Circuits

Layout of Functional Components

Piping Diagrams

Presents refrigerant piping diagrams for different unit capacities.

Refrigerant Flow Diagrams

Depicts refrigerant flow during various operating modes.

Part 3 Control

General Control Scheme Flowchart

Startup Control

Normal Operation Control

Protection Control

Details protection mechanisms against abnormal system conditions.

Part 4 Field Settings

Outdoor Unit Field Settings

Explains PCB switch settings for outdoor unit configuration.

Part 5 Electrical Components and Wiring Diagrams

Outdoor Unit Electric Control Box Layout

Outdoor Unit Main PCB

Wiring Diagrams

Part 6 Diagnosis and Troubleshooting

Error Code Table

Lists error codes, their content, and restart requirements.

Troubleshooting

Provides troubleshooting procedures for various error codes.