ASTG30CMTA / AOTG30CMTA - Operation Guide
This article summarises the operating instructions for the ASTG30CMTA wall-mounted indoor unit. The source operating manual also covers the ASTG34CMTA. The matched outdoor model for this article is AOTG30CMTA.
- Refrigerant: R32
- Operating modes: AUTO, COOL, DRY and FAN
- Temperature setting range: 18-30°C in AUTO / COOL / DRY
- Fan speeds: AUTO, HIGH, MED, LOW and QUIET
- Remote-control operating range: approximately 7 m
- Weekly timer: up to 4 programs per day / 28 per week
- Human Sensor Energy Saving: enabled from factory
- Minimum room area depends on total R32 refrigerant charge - see the safety table below.
Minimum Room Area - ASTG30CMTA
| Total Refrigerant Charge (M) | Minimum Room Area (X) |
|---|---|
| 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 |
Basic Operation
- Press START/STOP.
- Press MODEto select:
- AUTO
- COOL
- DRY
- FAN
- Use the TEMP buttons to set the required temperature.
Temperature adjustment is available from 18-30°C in AUTO, COOL and DRY modes. Temperature control is not available in FAN mode.
Fan Speed
Press the FAN button to cycle through:
- AUTO
- HIGH
- MED
- LOW
- QUIET
When AUTO fan speed is selected, fan speed is adjusted automatically according to the operating mode.
Vertical and Horizontal Airflow Direction
Vertical Airflow
- Press Vertical SET to adjust the vertical airflow direction.
- The vertical louvre has 6 positions.
- In COOL or DRY mode, leaving the louvre in positions 4-6 for more than approximately 20 minutes causes it to return automatically to position 3.
Horizontal Airflow
- Press Horizontal SET to adjust the horizontal airflow direction.
- The horizontal louvre has 5 positions.
Swing Operation
Pressing SWING cycles through:
- Up / down swing
- Left / right swing
- Up / down + left / right swing
- Stop swing
POWERFUL Operation
Press POWERFUL to operate the unit at maximum output and strong airflow for rapid cooling.
- The indoor unit emits 2 short beeps when POWERFUL starts.
- Press POWERFUL again to cancel; the unit emits 1 short beep.
- POWERFUL may cancel automatically after approximately 20 minutes or when the set temperature is reached.
- POWERFUL cannot operate simultaneously with ECONOMY.
- POWERFUL temporarily overrides Outdoor Unit Low Noise and Energy Saving.
ECONOMY Operation
Press ECONOMY to reduce energy consumption.
- In COOL or DRY mode, the room temperature is controlled a few degrees higher than the set temperature.
- Maximum output is approximately 70% of normal air-conditioning operation.
Outdoor Unit Low Noise
Press OUTDOOR UNIT LOW NOISE to reduce outdoor-unit noise by reducing compressor speed and fan speed.
- The setting remains stored until cancelled.
- It cannot be used simultaneously with FAN, DRY or POWERFUL operation.
Manual Operation Without the Remote
If the remote controller is unavailable, use the indoor-unit MANUAL AUTO button.
| Unit Status | Button Action | Result |
|---|---|---|
| Operating | Press once | Stop |
| Stopped | Press less than 10 seconds | AUTO operation |
| Stopped | Press more than 10 seconds | Forced cooling - servicing only |
Timer Functions
ON / OFF Timer
- Press TIMER SETTING.
- Use SELECT to choose ON, OFF, ON/OFF program, or SLEEP.
- Press NEXT.
- Set the required time using SELECT.
- Press SEND while close to the indoor unit.
SLEEP Timer
Available timer periods are:
0.5, 1, 2, 3, 5, 7 or 9 hours.
WEEKLY Timer
- Up to 4 programs per day.
- Up to 28 programs per week.
- An ON event can include a temperature setting.
- The clock and day must be set correctly before the Weekly Timer will operate.
A power interruption can make the internal timer clock incorrect. When power returns, the TIMER indicator may blink. Reset the day, time and timer settings as required.
Human Sensor - Energy Saving
The Human Sensor Energy Saving program is ON from the factory.
- Press SENSOR to enable or disable the function.
- If no person is detected for approximately 20 minutes, the unit automatically adjusts the temperature setting.
- In COOL / DRY mode, the set temperature may increase by up to approximately 2°C.
- Normal settings return when the sensor detects someone again.
The sensor detection range shown in the manual is approximately 7 m, with approximately 100° horizontal coverage and 90° vertical coverage.
Demand Response
The system supports Air Conditioning Demand Response where enabled by the electricity supplier.
| DR Mode | Operation |
|---|---|
| DR Mode 1 | Compressor OFF |
| DR Mode 2 | Electrical energy consumption limited to no more than 50% of rated half-hour consumption |
| DR Mode 3 | Electrical energy consumption limited to no more than 75% of rated half-hour consumption |
The indoor OPERATION indicator blinks while Demand Response is active.
Optional Wired Remote Controller
An optional wired remote controller can be used. The manual notes that some wireless remote functions are restricted when a wired controller is connected.
| Controller Type | Restricted Wireless Functions |
|---|---|
| Polar 3-core wired controller | Outdoor Unit Low Noise, Energy Saving, Powerful, Timer operation |
| Non-polar 2-core wired controller | Outdoor Unit Low Noise, Weekly Timer, Powerful |
The wired controller also adds a Temperature Set Back Timer function.
Operating Temperature and Humidity
- COOL / DRY indoor temperature: approximately 18-32°C
- Indoor humidity: below approximately 80% RH
For outdoor temperature and humidity limits, refer to the applicable outdoor unit installation manual.
Filter Cleaning
Clean the air filters approximately once every 2 weeks under normal use.
- Open the intake grille.
- Remove the filters.
- Vacuum or wash with mild detergent and warm water.
- Allow the filters to dry thoroughly in a shaded location.
- Refit the filters and close the intake grille completely.
Air Cleaning Filters
| Filter | Part Number | Maintenance |
|---|---|---|
| Apple-Catechin Filter | UTR-FA13-1 | Disposable. Replace approximately every 3 months. |
| Ion Deodorization Filter | UTR-FA13-2 | Clean approximately every 3 months; replace approximately every 3 years. |
Normal Operating Characteristics
The following may be normal and do not necessarily indicate a fault:
- Compressor operation delayed for approximately 3 minutes after sudden power OFF / ON.
- Refrigerant-flow noise for 2-3 minutes after startup.
- Slight squeaking caused by expansion and contraction of the front panel.
- Mist during COOL or DRY operation.
- Very low or stopped indoor airflow during DRY mode or AUTO monitoring.
- Reduced airflow when QUIET fan speed is selected.
Troubleshooting
Unit Does Not Operate
- Check the circuit breaker and power supply.
- Check for a power outage or blown fuse.
- Check whether a timer is preventing operation.
Poor Cooling
- Clean dirty air filters.
- Check that the indoor intake and outlet are not obstructed.
- Confirm the temperature setting is appropriate.
- Close open windows and doors.
- Check for strong sunlight or excessive internal heat loads.
- Check whether fan speed is set to QUIET.
- Check whether Outdoor Unit Low Noise is active.
- Check whether Demand Response is being applied by the electricity supplier.
Remote Controller Does Not Operate Correctly
- Check the batteries.
- Confirm battery polarity.
- Ensure there are no obstructions between the remote controller and indoor unit receiver.
- There is a burning smell or smoke.
- Water is leaking from the unit.
- The problem remains after the basic checks above.
- The OPERATION and TIMER indicators blink while the ECONOMY indicator flashes rapidly.