Brand: TOSHIBA
Category: Air Conditioner
Document Type: Manual
Language: EN
Manual for RAS-3M18S3AV-E,-TR
Uploaded: Nov. 21, 2025, 9:14 p.m.
Manual Publish Date: 2015-10-01
Warranty Information
Refer to the warranty card provided with the unit for warranty details.
This manual provides comprehensive information on the operation, installation, and maintenance of the Toshiba Air Conditioner, Split Type, Model RAS-3M18S3AV-E,-TR. It covers safety precautions, specifications, refrigerant details, construction and wiring diagrams, electrical parts, refrigerant cycle and control block diagrams, operation descriptions, installation procedures, troubleshooting, and parts lists. Specific sections detail performance characteristics for various indoor/outdoor unit combinations and capacity variation ratios based on temperature and pipe length.
Troubleshooting and error codes
| Trouble | Cause | Remedy | |||
| The air conditioner does not operate. | 1. Power supply failure. | 1. Check the fuse, circuit breaker, and power cord. | |||
| 2. Remote controller is not set correctly or battery exhausted. | 2. Check the remote controller setting and replace the battery. | ||||
| 3. Indoor unit is not set correctly. | 3. Check the indoor unit setting. | ||||
| 4. Outdoor unit is not set correctly. | 4. Check the outdoor unit setting. | ||||
| 5. Safety device triggered. | 5. Check the safety device and reset if necessary. | ||||
| The air conditioner does not cool or heat sufficiently. | 1. Air filter is dirty. | 1. Clean the air filter. | |||
| 2. Room temperature setting is incorrect. | 2. Adjust the room temperature setting. | ||||
| 3. Outdoor unit is blocked. | 3. Remove any obstructions around the outdoor unit. | ||||
| 4. Refrigerant leakage. | 4. Contact a qualified technician for refrigerant leak check and repair. | ||||
| 5. Indoor unit fan speed is too low. | 5. Set the fan speed to high. | ||||
| 6. Multiple indoor units are operating. | 6. If multiple units are operating, the cooling/heating capacity may be reduced. | ||||
| 7. Pipe length is too long. | 7. Consult the installation manual for maximum pipe length specifications. | ||||
| Noise is generated. | 1. Refrigerant flowing sound. | 1. This is normal. | |||
| 2. Outdoor unit fan noise. | 2. Ensure no obstructions around the outdoor unit. | ||||
| 3. Compressor starting/stopping sound. | 3. This is normal. | ||||
| Water leakage. | 1. Drain hose is clogged or frozen. | 1. Clear the drain hose. | |||
| 2. Installation angle is incorrect. | 2. Ensure the unit is installed at the correct angle. | ||||
| 3. Condensation is forming on the indoor unit. | 3. Check for proper insulation and airflow. |