ASTG24JFCC / AOTG24JFCC Operation Manual
1. Quick start
| Function | What to do |
|---|---|
| Start / stop | Press START/STOP. |
| Select mode | Press MODE to cycle through AUTO, COOL, DRY and FAN. |
| Set temperature | Use SET TEMP. AUTO / COOL / DRY range: 18–30 °C. |
| Fan speed | Press FAN to select AUTO, HIGH, MED, LOW or QUIET. |
| Economy | Press ECONOMY to reduce power consumption. Maximum output is approximately 70% of normal operation on a single-type system. |
2. Remote controller
The wireless remote controller operates the unit from approximately 7 metres when pointed toward the indoor-unit signal receiver. A beep confirms that the signal has been received.
- MODE: AUTO / COOL / DRY / FAN.
- FAN: AUTO / HIGH / MED / LOW / QUIET.
- SET TEMP: changes the thermostat setting.
- SET (Vertical): adjusts up/down airflow direction.
- SET (Horizontal): adjusts left/right airflow direction.
- SWING: selects up/down, left/right or combined swing.
- ECONOMY: enables energy-saving operation.
- SLEEP: sets a timed shutdown with gradual temperature adjustment.
3. Timer operation
Before using timer functions, set the remote controller clock to the correct current time.
| Timer | Operation |
|---|---|
| ON timer | Starts the air conditioner at the selected time. |
| OFF timer | Stops the air conditioner at the selected time. |
| PROGRAM timer | Combines one ON and one OFF timer transition within a 24-hour period. |
| SLEEP timer | During Cooling / Dry, the thermostat is raised 1 °C each hour until it has risen by 2 °C, then maintained until the selected stop time. |
4. Airflow direction and swing
Adjust airflow using the remote controller only after the indoor unit has started and the airflow louvers have stopped moving.
- Vertical airflow: positions 1–3 are used during Cooling / Dry; positions 1–6 are available during Fan mode.
- Horizontal airflow: five left/right positions are available.
- Swing: can operate vertically, horizontally, or in both directions together.
- In Cooling / Dry, do not leave the vertical louvers in positions 4–6 for long periods because condensation may form. If left there for more than approximately 20 minutes, the louvers automatically return to position 3.
5. Manual Auto operation
If the remote controller is lost or unavailable, press the indoor unit MANUAL AUTO button for more than 3 seconds but less than 10 seconds. The system operates in AUTO mode with AUTO fan speed and a standard thermostat setting of 24 °C.
6. Cleaning and care
Turn the air conditioner off and disconnect the power supply before cleaning.
- Clean the standard air filters approximately every 2 weeks during normal use.
- Remove dust with a vacuum cleaner or wash the filter with mild detergent and warm water.
- Allow filters to dry completely in a shaded place before refitting.
- Do not use water hotter than 40 °C, abrasive cleaners, benzene or thinner on the indoor unit.
- If the unit will be shut down for one month or longer, operate Fan mode for approximately half a day first to dry the internal components.
Optional air-cleaning filters
| Filter | Part number / maintenance |
|---|---|
| Polyphenol Catechin Air Cleaning Filter | UTR-FA13-1 — disposable; generally replace about every 3 months. |
| Negative Air Ions Deodorizing Filter | UTR-FA13-2 — clean approximately every 3 months and replace about every 3 years to maintain deodorising performance. |
7. Remote controller signal code
If two or more compatible air conditioners are installed in the same room, the remote controller can be assigned to one of four signal codes. The indoor unit must first be configured for the corresponding code by the installer or service technician.
- Press START/STOP until only the clock is displayed.
- Hold MODE for at least 5 seconds to display the current signal code.
- Use the temperature buttons to select the code that matches the indoor unit.
- Press MODE again to return to the clock display.
The remote controller returns to signal code A when its batteries are replaced.
8. Troubleshooting
| Symptom | Check / explanation |
|---|---|
| Does not restart immediately | A protection delay of approximately 3 minutes may prevent compressor operation after stopping or restoring power. |
| Water-flow or refrigerant noise | Refrigerant movement can be audible during operation and for a short period after starting or stopping. |
| Mist from indoor unit | A fine mist can occur during Cooling / Dry when room air is rapidly cooled. |
| Weak or stopped airflow | This can be normal in Dry mode, SUPER QUIET mode or during AUTO monitor operation. |
| Does not operate | Check the circuit breaker, power supply, fuse / breaker status and whether a timer is active. |
| Poor cooling | Check for dirty filters, blocked intake/outlet, incorrect set temperature, open doors/windows, strong sunlight, heat loads or SUPER QUIET operation. |
| Remote control response is incorrect | Check battery condition and battery polarity. |
9. Power interruption / Auto Restart
After a power interruption, the air conditioner automatically restarts in its previous operating mode when power is restored. If the interruption occurs during timer operation, the timer is reset and the TIMER indicator may flash.