Haier AC242ACEAA [304/408] Electric control functions

alarm, and compressor will not start up; when being electrified after being powered off, the

protection will be cancelled.

9.7 Exterior alarm input:

In normal state, it is off. When the exterior environment is abnormal, the system cannot ensure the

normal signal input, so the air conditioning system will stop and alarm, until the normal signal

resumes, the air conditioner will resume automatically.

9.8 Time shorting function

If the time shorting port is in short circuit, the unit will perform a 1/60 time shorting control.

9.9 Auto-restart

a. Entering condition: In 5 seconds press the SLEEP button for 10 times, the buzzer sounds 4 times.

At the same time, the present state will be saved in EEPROM.

b. After entering the auto-restart state, the following information will be memorized: ON/OFF,

running mode (AUTO, HEAT, COOL, DRY, FAN), fan speed (AUTO, HIGH, MED, LOW), the set

temperature (16ć-30ć), the louver position and HEALTH; while the TIMER, SLEEP and CLOCK

will not be memorized.

c. Quit condition: in 5 seconds press SLEEP button 10 times, the buzzer will sound 2 times.

9.10 Auto check function

Before being electrifed, it is in short circuit; after being electrified, 10 seconds later, it will enter

auto-check circuit. Before auto-check, please ensure the input values (sensor, pressure switch)

normal, or the buzzer will sound 5 times to show there is abnormal; all the ports will output as the

following sequence: run lamp-timer lamp-electric heater-water pump-compressor/compressor

lamp-outdoor motor-4-way valve; after the auto-check is finished, the buzzer sounds once.

9.11 Outdoor crankcase heater (only for the unit with low ambient cooling function)

For the unit without outdoor PCB, but with low ambient cooling function, outdoor crankcase heater

will be controlled by indoor unit. Once being electrified, electric heater will begin to work until the

compressor is running.

10. System protection

10.1 3-minute protection for compressor startup

After the compressor stops, at least 3 minutes later, the compressor can restart up; if the unit is

powered off in running, after being electrified, 3 minutes later, the compressor can restart up. Being

electrifed for the first time, there is 3-minute delay protection.

10.2 Anti-current rush

2 seconds later after compressor is running, outdoor motor can work.

Electric control functions

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