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8-5-2. HEAT operation

(1) The fan speed is changed as shown in the figure

below, based on the outdoor air temperature and the

operating frequency.

(2) The fan speed is changed as shown in the figure

below based on the highest temperature of the indoor

heat exchanger for connected indoor units (including

stopped units).

Temperature of indoor heat exchanger

(°C)

Conditions of (1)

Maintain previous status

(Increase) (Decrease)

Stop operation

Fan H

Fan H Fan H

Fan L

Less than 35 Hz

Above 35 Hz

Above 5°C

5°C or below

Outdoor air

5°C

19 Hz Frequency

-6. Control at HEAT Start-up

If HEAT operation is started when the outdoor air

temperature is 15°C or below, the unit operates at the

HEAT start-up frequency (70 Hz or above).

Reset conditions

1 The compressor frequency exceeds the start-up

frequency of 70 Hz.

2 The compressor thermostat is OFF.

3 Frequency reduction for indoor high-load control has

occurred.

4 The outdoor air temperature is above 15°C.

5 The main-unit switch on one or more indoor units is

set to TEST run.

Argo AE4MI91AH User Manual

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