ASTG30KMTA / ASTG34KMTA
1. Quick operation
| Function | Operation |
|---|---|
| Start / stop | Press Start/Stop. |
| Operating mode | Press MODE: AUTO → COOL → DRY → FAN → HEAT. |
| Temperature | AUTO / COOL / DRY: 18–30 °C. HEAT: 16–30 °C. Temperature control is unavailable in FAN mode. |
| Fan speed | AUTO → HIGH → MED → LOW → QUIET. |
| Remote range | Approximately 7 m when aimed at the indoor unit signal receiver. |
Manual Auto operation
If the remote controller is unavailable, the MANUAL AUTO button on the indoor unit can be used:
| Unit status | Button action | Result |
|---|---|---|
| Operating | Press | Stops operation |
| Stopped | Press for less than 10 seconds | AUTO operation |
| Stopped | Press for more than 10 seconds | Forced cooling – service use only |
2. Airflow direction and swing
The unit has motorised vertical and horizontal airflow adjustment from the wireless remote controller.
| Setting | Range / behaviour |
|---|---|
| Vertical airflow | 6 positions. Default: position 2 in COOL / DRY and position 4 in HEAT. |
| Horizontal airflow | 5 positions. Default: centre position 3. |
| Swing | Up/down → left/right → up/down + left/right → stop swing. |
| Up/down swing range | COOL / DRY: positions 1–4. HEAT: positions 3–6. FAN follows the previously selected airflow range. |
3. Timer operation
Set the day and clock before configuring timers. Following a power interruption, the TIMER indicator may blink and the clock/timer should be reset.
| Timer | Purpose |
|---|---|
| ON timer | Starts the unit at the selected time. |
| OFF timer | Stops the unit at the selected time. |
| Program timer | Combines an ON and OFF timer within a 24-hour period. |
| SLEEP timer | Gradually adjusts temperature for comfort, then turns the unit off after the selected duration. |
| WEEKLY timer | Up to 4 ON/OFF reservations per day, up to 28 per week. |
Weekly Timer important points
- Up to 4 programs can be configured for each day.
- ON timer temperature can be selected.
- AUTO / COOL / DRY timer temperatures are 18–30 °C.
- HEAT timer temperature can be 10 °C or 16–30 °C.
- The Weekly Timer cannot operate simultaneously with ON/OFF, Program or SLEEP timers.
- If ON and OFF are set for the same time, the ON timer takes priority.
4. Comfort and energy-saving functions
POWERFUL operation
Runs the unit at maximum power and strong airflow for rapid cooling or heating. It automatically ends when the target condition is reached or after approximately 20 minutes. POWERFUL cannot be used at the same time as ECONOMY and temporarily overrides Outdoor Unit Low Noise and Energy Saving.
10 °C HEAT
Maintains the room at approximately 10 °C to help prevent the temperature dropping too low. Only vertical airflow adjustment is available during 10 °C HEAT, and heating will not run if the room is already warm enough.
ECONOMY
Reduces energy use by moderating the temperature target. In COOL / DRY the room temperature is allowed to rise a few degrees; in HEAT it is allowed to fall a few degrees. Maximum output is approximately 70% of normal operation.
Outdoor Unit Low Noise
Reduces outdoor-unit noise by lowering compressor rotation and fan speed. The setting is retained until cancelled. It cannot be used at the same time as FAN, DRY or POWERFUL operation.
Human Sensor – Energy Saving
The Energy Saving program is ON from the factory. If no movement is detected for approximately 20 minutes, the system moderates the temperature setting and returns to the original setting when occupancy is detected again.
| Mode | When no one is detected |
|---|---|
| COOL / DRY | Set temperature increases by up to approximately 2 °C. |
| HEAT | Set temperature decreases by up to approximately 4 °C. |
| AUTO | Energy Saving follows the currently selected cooling / heating / drying operation. |
The Human Sensor detection area is approximately 7 m, 90° vertical and 100° horizontal. Detection can be affected by people remaining still, furniture or glass, thick clothing, pets, moving curtains/plants and heat-producing appliances.
Demand Response
The product is compatible with Air Conditioning Demand Response where arranged with the electricity supplier. During a DR event, the OPERATION indicator blinks and cooling/heating capacity may be reduced.
| DR mode | Operation |
|---|---|
| DR1 | Compressor off. |
| DR2 | Electrical energy consumption is limited to no more than 50% of rated consumption over a 30-minute period. |
| DR3 | Electrical energy consumption is limited to no more than 75% of rated consumption over a 30-minute period. |
5. Optional wired remote controller
An optional wired remote controller can be used, including simultaneously with the wireless remote controller, but some wireless functions become restricted.
| Controller type | Restricted wireless functions |
|---|---|
| Polar 3-core | Outdoor Unit Low Noise, Energy Saving, 10 °C HEAT, POWERFUL and timer operation. |
| Non-polar 2-core | Outdoor Unit Low Noise, 10 °C HEAT, Weekly Timer and POWERFUL. |
The wired remote controller also provides a Temperature Set Back Timer.
6. Cleaning and care
During normal use, clean the main air filters approximately every 2 weeks. Dirty filters reduce airflow, lower efficiency and can increase operating noise.
| Air cleaning filter | Part number / maintenance |
|---|---|
| Apple-catechin filter | UTR-FA13-1. Disposable. Replace approximately every 3 months under normal use. |
| Ion deodorization filter | UTR-FA13-2. Light blue. Clean approximately every 3 months and replace approximately every 3 years. |
If the unit has been shut down for one month or longer, operate FAN mode for approximately half a day to dry the internal components before returning to normal operation.
7. R32 minimum room area
| Model | Total refrigerant charge M | Minimum room area X |
|---|---|---|
| ASTG30KMTA | M ≤ 1.65 kg | 2.60 m² |
| 1.65 < M ≤ 2.05 kg | 4.01 m² | |
| 2.05 < M ≤ 2.45 kg | 5.72 m² | |
| 2.45 < M ≤ 2.85 kg | 7.74 m² | |
| ASTG34KMTA | M ≤ 2.00 kg | 3.81 m² |
| 2.00 < M ≤ 2.45 kg | 5.72 m² | |
| 2.45 < M ≤ 2.90 kg | 8.02 m² |
M = amount of refrigerant charge. X = minimum room floor area. Refer to the installation manual and applicable R32 requirements before installation or service.
8. Normal operating characteristics
- Restart delay: Compressor operation may be delayed for approximately 3 minutes after a sudden OFF → ON power change.
- Automatic defrost: Heating may stop temporarily for up to approximately 15 minutes. The OPERATION indicator blinks during defrost.
- Heating airflow: Fan speed may remain very low during warm-up or when room temperature is above the heating set point.
- DRY mode: Fan operates at low speed and may stop intermittently.
- Mist / steam: Light mist indoors during cooling or steam outdoors during heating defrost can be normal.
- Water from outdoor unit: Water can be produced during heating defrost.
- Operating sounds: Refrigerant-flow sounds, slight panel movement and sizzling during defrost can be normal.
9. Troubleshooting
| Symptom | Checks / explanation |
|---|---|
| Does not operate | Check the circuit breaker, power supply, fuse and whether a timer is active. |
| Poor cooling or heating | Check filters, blocked inlet/outlet, temperature setting, open doors/windows, strong sunlight, heat loads, QUIET fan speed, Outdoor Unit Low Noise and whether Demand Response is active. |
| Airflow weak or stopped | Can be normal during heating warm-up, when the heating set point has been reached, automatic defrost, DRY operation, QUIET fan or AUTO monitoring. |
| Remote setting not followed | Check remote batteries and whether the electricity supplier is applying Demand Response. |
Indoor operating range
| Mode | Indoor range |
|---|---|
| COOL / DRY | Approximately 18–32 °C; indoor humidity below approximately 80%. |
| HEAT | Approximately 16–30 °C. |