ComfortStar CSA-S Series Split Air Conditioner Service Manual
Brand: ComfortStar
Series: CSA-S
Important Note
Read this manual carefully before operating your new air conditioning unit. Make sure to save this manual for future reference. Please check the applicable models, technical data, F-GAS (if any) and manufacturer information from the "Owner's Manual" in the packaging of the outdoor unit.
Chapter 1: Product Specification
1.1 Photo of Product (for reference only)
Indoor Unit: A white, rectangular indoor unit designed for wall mounting.
Outdoor Unit: A white, rectangular outdoor unit with a visible fan grille and casing.
1.2 Outline Dimensions
Indoor Unit Dimensions (mm)
| MODEL | 12000BTU | 18000BTU | 24000BTU |
|---|---|---|---|
| W | 800 | 970 | 970 |
| D | 292 | 310 | 310 |
| H | 190 | 230 | 230 |
Outdoor Unit Dimensions (mm)
| MODEL | 12000BTU | 18000BTU | 24000BTU |
|---|---|---|---|
| W | 740 | 800 | 860 |
| D | 302 | 302 | 378 |
| H | 550 | 550 | 597 |
Chapter 2: Refrigeration Diagrams
Cooling Mode
System Composition: Compressor, outdoor heat exchanger (condenser), capillary, indoor heat exchanger (evaporator), high-pressure valve, low-pressure valve.
The diagram illustrates the flow of refrigerant between the indoor and outdoor units. The indoor unit contains the indoor heat exchanger. The outdoor unit contains the compressor, outdoor heat exchanger, and a muffler. Refrigerant flows through connecting pipes, with a low-pressure valve and high-pressure valve regulating the flow.
Cooling Cycle
The cooling cycle involves the following stages:
- Compressor: Compresses refrigerant into high-temperature and high-pressure steam.
- Outdoor Heat Exchanger (Condenser): Cools the refrigerant, turning it into liquid at room temperature and high pressure.
- Capillary: Reduces the refrigerant's pressure, making it low-temperature and low-pressure liquid.
- Indoor Heat Exchanger (Evaporator): Absorbs heat from the room, turning the refrigerant into low-temperature and low-pressure steam.
Connections are made via pipe joints.
Chapter 3: Wiring Diagram
Indoor Unit Wiring Diagrams
Electric Chart for 12K (Model: 1.06.07.00013A)
The indoor unit wiring diagram shows connections to the circuit board, display board, louver motor (MV), left/right swing motor (MV), thermistors (TH1 for room, TH2 for pipe), fan motor (MF) with speed signal and protector, and heat exchanger. Connections are made via various connectors (CN8, CN5, CN115, CN6, CN3, CN4). The diagram also indicates connections to the outdoor unit via L, N, and ground (yellow/green) lines.
Electric Chart for 18K (Model: 1.06.07.00017AAA)
Similar to the 12K diagram, this shows the indoor unit wiring for the 18K model, including connections to the circuit board, display board, motors, thermistors, fan motor, and heat exchanger, with specific model number reference.
Electric Chart for 24K (Model: 1.06.07.00017ACA)
This diagram details the indoor unit wiring for the 24K model, featuring connections to the circuit board, display board, motors, thermistors, fan motor, and heat exchanger, with its specific model number reference.
Outdoor Unit Wiring Diagrams
Electric Chart for 12K/18K (Model: 1.06.07.00014AD)
The outdoor unit wiring diagram illustrates connections for the compressor (CM), compressor capacitor, and fan motor (MF) with its capacitor. It shows internal or external protector connections. The diagram details wiring from the indoor unit, including L, N, and ground (YLW/GRN), to the outdoor unit components.
Electric Chart for 24K (Model: 1.06.07.00018AD)
This diagram outlines the outdoor unit wiring for the 24K model, showing connections to the compressor (CM), compressor capacitor, and fan motor (MF) with its capacitor. It includes grounding connections and wiring from the indoor unit.
Chapter 4: Troubleshooting Guide
4.1 Error Code
| No. | Error Code | Problem |
|---|---|---|
| 1 | E1 | RT sensor error |
| 2 | E2 | IPT sensor error |
| 3 | E5 | Outdoor protection |
| 4 | E6 | Indoor fan motor error |
4.2 Troubleshooting Guide
| Trouble | Analysis |
|---|---|
| Does not run |
|
| No cooling or heating air |
|
| Ineffective control | If strong interference (from excessive static electricity discharge, power supply voltage abnormality) is present, operation will be abnormal. At this time, disconnect from the power supply and connect back 2-3 seconds later. |
| Does not operate immediately | Changing mode during operation, there will be a 3-minute delay. |
| Peculiar odor | This odor may come from another source such as furniture, cigarette, etc., which is sucked in the unit and blows out with the air. |
| A sound of flowing water | Caused by the flow of refrigerant in the air conditioner, not a trouble. Defrosting sound in heating mode. |
| Cracking sound is heard | The sound may be generated by the expansion or contraction of the front panel due to change of temperature. |
| Spray mist from the outlet | Mist appears when the room air becomes very cold because of cool air discharged from the indoor unit during COOLING or DRY operation mode. |
| The compressor indicator (red) lights on constantly, and indoor fan stops. | The unit is shifting from heating mode to defrost. The indicator will light off within ten minutes and returns to heating mode. |
