This article summarises the main operating instructions for the ASTG12JECA compact wall-mounted indoor unit and its corresponding AOTG12JEC outdoor unit.

Quick Start

1. Press START/STOP.
2. Press MODE to select AUTO, COOL, DRY or FAN.
3. Use the SET TEMP. buttons to select the required temperature.
4. Use the FAN button to select AUTO, HIGH, MED, LOW or QUIET.

Remote Controller Preparation

• Uses 2 × AAA / R03 / LR03 batteries.
• Set the current time using the CLOCK ADJUST button and TIMER SET buttons.
• Point the remote controller toward the indoor-unit signal receiver.
• The normal operating range is approximately 7 m.
• A beep confirms that the indoor unit has received the command.

AUTO Operation

When AUTO is selected, the indoor unit initially operates the fan at very low speed while it assesses room conditions and selects the appropriate operating mode.

• If room temperature is above the defined temperature, the unit selects COOL or DRY.
• If room temperature is close to or below the defined temperature, the unit enters Monitor operation.
• During Monitor operation, the fan runs at low speed.
• If AUTO does not select the desired mode, manually choose COOL, DRY or FAN.

Cooling, Dry and Fan Modes

Super Quiet Operation

Select QUIET fan speed to reduce indoor airflow and operating noise.

• Cooling performance is reduced during SUPER QUIET operation.
• SUPER QUIET cannot be used during DRY mode.

Timer Functions

• ON Timer
• OFF Timer
• Program Timer
• SLEEP Timer

ON / OFF Timer

1. Press TIMER MODE until ON or OFF is selected.
2. Use the TIMER SET buttons to set the required time.
3. The orange TIMER indicator on the indoor unit will illuminate.

Program Timer

The Program Timer combines one ON timer and one OFF timer into a single sequence within a 24-hour period. It can be used, for example, to switch the unit OFF after going to sleep and ON again before waking.

Sleep Timer

The SLEEP timer gradually adjusts the set temperature to avoid excessive cooling while sleeping and switches the air conditioner off when the selected period expires.

During COOL or DRY operation, the thermostat setting rises by 1°C each hour until it has increased by a total of 2°C. The setting is then maintained until the timer expires.

Airflow Direction

Vertical airflow is adjusted using the remote controller SET button. Horizontal airflow is adjusted manually using the right-left louvers.

Swing Operation

Press SWING to automatically move the vertical airflow louvers up and down.

• During COOL / DRY mode, swing operates between positions 1 and 4.
• Swing may pause when the fan is stopped or operating at very low speed.

Economy Operation

Press ECONOMY to reduce power consumption.

• Maximum output is approximately 70% of normal cooling operation.
• The room temperature will be slightly higher than the selected set temperature during cooling.
• ECONOMY will not activate during the Monitor period in AUTO mode.

Manual Auto Operation

Use MANUAL AUTO if the wireless remote controller is lost or unavailable.

• Press and hold MANUAL AUTO for more than 3 seconds and less than 10 seconds to start AUTO operation.
• Fan speed is set to AUTO.
• Temperature setting is approximately 24°C.
• To stop, press MANUAL AUTO for approximately 3 seconds.
• Holding MANUAL AUTO for more than 10 seconds starts Forced Cooling for service purposes.

Operating Range

Auto Restart After Power Failure

If power is interrupted, the air conditioner automatically restarts in the previous operating mode once power is restored.

If power is interrupted during timer operation, the timer is reset and the TIMER indicator may flash. Reset the timer as required.

Cleaning and Care

• Clean the standard air filters approximately every 2 weeks under normal use.
• Remove dust with a vacuum cleaner or wash the filters using neutral detergent and warm water.
• Allow filters to dry thoroughly in a shaded location before reinstalling.
• Do not use water hotter than 40°C, abrasive cleaners, benzene or thinner.
• If the unit will be unused for 1 month or more, operate FAN mode for approximately half a day before shutdown to dry internal components.

Air Cleaning Filters

Filter Indicator Reset

Where the optional filter indicator function has been enabled during installation, clean the filters and then press the indoor unit MANUAL AUTO button for 2 seconds or less to reset the indicator.

Normal Operating Characteristics

• Approximately 3-minute compressor delay after restarting or restoring power.
• Refrigerant-flow sounds during operation or shortly after stopping.
• Slight squeaking caused by expansion and contraction of the front panel.
• Odours previously absorbed from the room may be emitted from the indoor unit.
• A light mist may be visible during COOL or DRY operation.
• Low or intermittent airflow during DRY mode.
• Very low airflow during SUPER QUIET operation.
• Very low fan speed during Monitor operation in AUTO mode.

Troubleshooting

Unit Does Not Operate

• Check whether the circuit breaker is ON.
• Check for a power failure.
• Check whether a fuse has blown or circuit breaker has tripped.
• Check whether the timer is controlling operation.

Poor Cooling Performance

• Check whether the air filter is dirty.
• Check whether the intake grille or outlet is blocked.
• Confirm the thermostat setting is appropriate.
• Check whether windows or doors are open.
• Check for strong direct sunlight.
• Check for high internal heat loads or excessive room occupancy.
• Check whether SUPER QUIET operation is selected.

Remote Controller Does Not Operate Correctly

• Check whether the remote-controller batteries are flat.
• Confirm the batteries are installed with the correct polarity.