Haier AB182ACERA Service Manual page 41

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 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 (16℃-30℃), 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
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Commercial Air Conditioner
Model: AB182ACERA
AC182ACERA