TGM MWVIT12S - User Manual

Vision Inverter Series
Service Manual 2016

Summary

1. Precaution

1.1 Safety Precaution

General safety instructions to prevent injury and property damage.

1.2 Warning

Warnings related to installation and general usage to prevent hazards.

CAUTION

Additional cautions for installation, operation, and maintenance.

5 Installation Details

5.1 Wrench torque sheet for installation

Specifies torque values for pipe connections during installation.

5.2 Connecting the cables

5.3 Pipe length and the elevation

Provides pipe length and refrigerant amount specifications for models.

5.4 Installation for the first time

Step-by-step guide for evacuating the system using a vacuum pump.

5.6 Re-installation while the indoor unit need to be repaired

Steps to collect refrigerant before indoor unit repair.

5.7 Re-installation while the outdoor unit need to be repaired

Steps for system evacuation before outdoor unit repair.

8.3 Main Protection

8.3.1 Three minutes delay at restart for compressor

Details the compressor restart delay protection.

8.3.2 Temperature protection of compressor top

Explains protection against high compressor top temperature.

8.3.3 Temperature protection of compressor discharge

Protection mechanism for high compressor discharge temperature.

8.3.4 Fan speed is out of control

8.3.5 Inverter module protection

8.3.8 Sensor protection at open circuit and breaking disconnection.

8.3.9 Refrigerant leakage detection

8.3.10 Zero crossing detection error protection

8.4 Operation Modes and Functions

8.4.2 Cooling Mode

8.4.2.1 Compressor running rules

8.4.2.4 Condenser temperature protection

8.4.2.5 Evaporator temperature protection

8.4.3 Heating Mode (for heat pump models)

8.4.3.1 Compressor running rules

8.4.3.4 Defrosting mode

8.4.3.5 Evaporator coil temperature protection

8.4.8 Auto-Restart function

8.4.9 Refrigerant Leakage Detection

8.4.16 Point check function

9. Troubleshooting

9.1 Indoor Unit Error Display

Lists error codes and their meanings for indoor units.

9.2 Trouble shooting

Provides troubleshooting steps for specific error codes.

9.2.1 EEPROM parameter error diagnosis and solution(E0;F4)

Troubleshooting for EEPROM parameter errors.

9.2.2 Indoor; outdoor units communication diagnosis and solution(E1)

Troubleshooting for communication errors between units.

9.2.3 Zero crossing detection error diagnosis and solution (E2)

Troubleshooting for zero crossing detection errors.

9.2.4 Fan speed has been out of control diagnosis and solution(E3)

Troubleshooting for indoor fan speed control issues.

2. Outdoor DC Fan Motor

3. Indoor AC Fan Motor

9.2.5 Refrigerant Leakage Detection diagnosis and solution (EC)

Troubleshooting for refrigerant leakage detection.

9.2.6 Open circuit or short circuit of temperature sensor diagnosis and solution(E5)

Troubleshooting for temperature sensor faults.

9.2.7 Overload current protection diagnosis and solution(F0)

Troubleshooting for overload current protection.

9.2.8 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)

Troubleshooting for IPM malfunction.

9.2.9 Over voltage or too low voltage protection diagnosis and solution(P1)

Troubleshooting for voltage protection issues.

9.2.10 High temperature protection of IPM or compress top diagnosis and solution (P2)

Troubleshooting for IPM/compressor top high temperature.

9.2.11 Inverter compressor drive error diagnosis and solution (P4)

Troubleshooting for inverter compressor drive errors.

Main parts check

1. Temperature sensor checking

Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C-K)

Appendix 2 Temperature Sensor Resistance Value Table for T5 (°C -K)

2.Compressor checking

TGM MWVIT12S Specifications

General

Input Voltage	12V DC
Output Voltage	220V AC
Cooling Method	Fan Cooling
Output Frequency	50Hz
Protection Features	Overload, Short Circuit, Over Temperature