Haier AC122ACERA [303/408] Electric control functions

function.

5˅ If SLEEP function is set, the TIMER function can not be set.

6˅ If sleep function is set after setting TIMER ON function, the sleep function only can be set

befroe the TIMER ON time arrives.

After setting sleep function, press CLOCK button to check the clock; press TEMP button to display

the set temperature, and press again to change the set temperature.

9.3 Emergency operation

Press emergency button for over 1 second continuously, when loosing it, the buzzer will sound

once.

Emergency operation: AUTO cooling state, the set temperature 24ć, indoor motor at high speed,

not adjusting the temperature sensor abnormal and the protection, the thermostat ON, 3 minutes

later, the compressor starts up, and another 3 minutes later, quit the trial running and enter the

normal operation as the setting;

Press again, enter the shutoff state.

9.4 Compulsory cooling operation

In OFF state, press compulsory button for over 10 seconds continuously, loose it and the buzzer will

sound twice, then the unit enters the compulsory cooling operation, or after the panel receives the

compulsory cooling signal, the unit enters the compulsory cooling state. For the first time, there is

no compressor 3-minute protection, the unit will run for 5 minutes in cooling mode, and

indoor/outdoor motors are in high speed; in the 5 minutes, the system will not adjust the protection

and not be limited by the ambient temperature, but the compressor will be limited by 3-minute

protection. 5 minutes later, the unit will enter the normal state. In the compulsory cooling state, you

can press any button to quit the state. For the unit with outdoor PCB, the compressor and the

outdoor motor will be controlled by outdoor PCB.

9.5 Water level inspection and water pump control

1) In COOL (including cooling state of AUTO mode and the compulsory cooling) and DRY mode, as

long as the compressor runs, water pump will work; and once the compressor stops, water pump

will stop 5 minutes later;

2) In standby state of cooling mode, heating mode and fan mode (including auto fan mode), after

water tank is full, the float switch will disconnect, if the controller detects this signal for 2

seconds, the water pump will begin to work. After the float resets, water pump will continue

working and stops 5 minutes later;

3) If the water-full signal is detected for over 5 minutes, the compressor will stop; water pump will

work for 5 minutes and stop for 5 minutes, then repeat as a cycle, until the float resets, the

water pump will stop 5 minutes later; if water pump has repeated for 4 cycles, the float can not

reset, and the unit will alarm water drainage abnormal. And the water pump will continue the

cycle.

9.6 High pressure switch control:

3 minutes later after compressor starts up, the system will check the pipe pressure. If the pipe

pressure is over high and high pressure switch acts for over 30 seconds, the compressor and

outdoor motor will stop, 3 minutes later, the unit will resume. If in 30 minutes the unit stops for 3

times because of overhigh pressure, the system will alarm, then compressor will not start up again;

when being electrified after being powered off, the protection will be cancelled.

Low pressure switch control (without outdoor PCB):

When compressor is running, the unit will check pipe pressure, when pipe pressure is over low

and low pressure switch acts for 30 seconds, compressor and outdoor motor stop, the unit will

Electric control functions

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Haier AC122ACERA [303/408] Electric control functions

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