Haier AC242ACEAA [321/408] Electric control functions

1. Temperature adjustment function

1.1 In this function, outdoor running frequency depends on the indoor temperature and the set temperature.

1.2 In auto mode, indoor fan speed will be changed according to the request of temperature adjustment.

1.3 In heating operation, indoor fan speed will be controlled according to the coil temperature.

1.4 Defrosting

In heating mode, outdoor transfers the defrosting signal to indoor unit, then indoor unit will enter defrosting mode

until outdoor transfers defrost-cancelling signal, then indoor unit will enter heating mode. In defrosting, there is no

over load protection.

1.5 Air flow limitation

2.1 If air flow is adjusted by hand, the target rotation is (High+Low)/2.

If air flow is adjusted automatically, the target rotation is (Auto High+Auto Low)/2, it will not be counted if being

below 10rpm.

2.2 Heat operation

2.2.1 Hot start up

In heating, anti-cold air control is as the following chart:

Heat exchanger temp.

THHOT3

37.0ď

THHOT2

According to the heat exchanger temperature, fan motor will be controlled due to the above chart.

1) When heat exchanger temp. rises up, adjust the fan speed due to the heat exchanger temp.

ć and lower than 35.2ć, fan speed is ultra low);

If heat exchanger temp. is between 35.2ć and 37ć, fan speed is low;

If heat exchanger temp. is higher than 37ć, fan motor will run at set speed.

2) When heat exchanger temp. reduces, adjust the fan speed due to the heat exchanger temp.

If heat exchanger is below 35.2ć and over 25.2ć, fan speed is low;

If heat exchanger is below 25.2ć, fan speed is ultra low, and remain the state (When being electrified for the first

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