Haier AC242ACEAA [332/408] Electric control functions

Haier AD362AMEAA [332/408] Electric control functions
many differences, please refer to the corresponding Service Manual to reach the detailed information.
Note: Take the electric control function of AU362AHERA as an example, as for other models, there are
Definition of sensor sign: Taoi=indoor ambient temp., Tao=outdoor ambient temp., Tc=indoor coil,
Td=dischange, Te= outdoor coil, Ts=suction, Tci=condenser air inlet temp.
Control purpose: make condensate pressure and vaporing pressure normal, systerm running reposefully.
1.1 Outdoor running frequency and the control procedure
1.1.1 Outdoor running frequency control
Outdoor running frequency range:
Outdoor temp.
~15ć 15ć~38ć 38ć~
Cooling frequency range 20RPS 50RPS 35RPS 85RPS 20RPS 78RPS
Outdoor temp.
~0ć 0ć~15ć 15ć~
Heating frequency range 35RPS 95RPS 20RPS 90RPS 20RPS 65RPS
Defrost frequency 85RPS
1.1.2 Compressor startup
Every time compressor is from OFF to ON, no matter how is the indoor target frequency, compressor
running frequency must be stay at 40Hz and 54Hz (E) for 1 minutes (At outdoor discharging temp. overhigh
protection and compressor overcurrent protection, the frequency will be reduced), and then rise up to the
target frequency. After the unit is in normal, the above procedure is not available.
General startup:
Target frequency
60sec 54Hz
40Hz
Inverter compressor 0Hz
30sec 60sec 60 sec
 ON
SV1/SV2 valve OFF

Fiducial open angle
EEV A Current pls
Special condition:
If the target frequency is less than 40Hz, the startup must run for 1 minute at both 40Hz and 54Hz, then
run to the target frequency.
The jump frequency point(syntonic point) should be avoided during rise frequency process, so some jump
frequency points(about 45) should be pre-setted.
The jump frequency points of compressor are: 50HZ (E), 60 HZ (E), 70 HZ (E), 80HZ (E) and 90HZ (E)
1.1.3 Heating mode, cooling mode and dehumidification
After performing the compressor startup procedure, the unit will run according to the indoor frequency.
2 minutes later, the unit will compensate the running frequency due to the relative condition.
1.1.4 Compressor frequency rising/reducing speed
Rapid rising/reducing frequency speed 1----1Hz/second
Slow rising/reducing frequency speed 2----1Hz/10 seconds
1.2 Outdoor motor control
Note: When the outdoor motor needs to change the class, there will be 20-second interval to avoid the fan
3.7 Electric control function for DC inverter outdoor unit(*ERA)
Electric control functions
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