MAXA BDS28A Especificações descarregar pdf (Página 11)

7. Control functions

7.1. Temperature Parameters

• Indoor preset temperature (Tpreset)

• Indoor ambient temperature (T

amb)

7.2. Basic functions

Once energized, the compressor should in no way be restarted unless after at least 3-minute time interval. In case of having

memory function, for the first energization, the compressor will be started without 3-minute lag, if being under the condition

of power-off, and the compressor will have 3-minutes delay to be started under the condition of power-on. Once started, the

compressor will not be stopped within 6 minutes with the changes of room temperature.

7.2.1 Cooling Mode

 Cooling Condition and Process

When T

amb. ≥ Tpreset , the unit will run under cooling mode, in which case the compressor and outdoor fan will be started,

and the indoor fan will run at preset speed.

When T

amb. ≤ Tpreset -3°C, the compressor will stop, the outdoor fan will stop with time lag of 30s, and the indoor fan will run

at preset speed.

When T

preset -3°C <Tamb. < Tpreset , the unit will maintain its original operating status.

■ Under this mode, the switchover (reversal) valve will be de-energized and the temperature can be set from 16°C to 30°C.

If the compressor is shut down for some reason, the indoor fan and the swing device will operate at the original state.

Tpreset

Tpreset –2 ˚C

Compressor

Outdoor fan

Indoor fan

Run

Tamb.

Stop

Stop cooling

Start cooling

Original operating status

≥ 6 min. ≥ 3 min. ≥ 6 min.

Setting fan speed

 Protection function

♦ Overcurrent protection

If total current is high, the compressor will run in limited frequency. If total current is too high, the compressor will stop, the

outdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor yellow light will blink 5 times.

♦ Antifreeze protection

When the antifreeze protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and the

indoor fan and swing motor will keep running in the original mode. When antifreeze protection is eliminated and the

compressor has stopped for 3 minutes, the compressor will resume running in the original mode.

The period o

antifreezing protection

Compressor

Outdoor fan

Indoor fan

3 min

Low fan speed

Run

Stop

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