Haier AU122AEERA Service Manual page 36

Initialize movement: 600 pulse close, then 50 pulse open, that is stop at 50 pulse at last;
Full-open: 480 pulse open(E);
Upper/lower limitation of open angle: 480---50 pulse;
Driving speed: open direction: 30.3 PPS; close direction: 83.3 PPS;
Electrify initialize movement: act as full-close;
The movement of valve after compressor startup/shut off ;
Compressor startup: the compressor will startup after the open angle of valve has reached the
fiducial open angle;
Compressor shut off: valve begin to full-close after the compressor has stopped.
1.3.2 Enter the fiducial open angle after compressor startup(no matter 2 minutes later or 2 minutes ago), 4
minutes later adjust automatically according to the target over-heat value, 10 minutes later begin to modify
the over-heat value and open angle of valve.
Cool
Outdoor temp.
Compressor frquency
PMV open angle
Heat
Outdoor temp.
Compressor frquency
PMV open angle
1.3.3 Confirmation of over-heat degree
Standarded over-heat degree
Actual running Hz
TXRH0 Cool, dry
（℃） heat
When discharging temp. Td is too high or too low, modify the EEV angle
Mode Modification angle
Cooling Ttc＞100℃, standarded over-heat degree -1 degree / 2 minutes
90℃< Ttc<100℃, keep the angle
Ttc<90℃, +1 degree / 2 minutes, and plus to 0 degree gradually
Cooling Ttc<35℃, standarded over-heat degree +1 degree / 2 minutes
35℃< Ttc<40℃, keep the angle
Ttc＞40℃, -1 degree / 2 minutes, and reduce to 0 degree gradually
Heating Ttc＞100℃, standarded over-heat degree -1 degree / 2 minutes
90℃< Ttc<100℃, keep the angle
Ttc<90℃, +1 degree / 2 minutes, and plus to 0 degree gradually
Heating Ttc<35℃, standarded over-heat degree +1 degree / 2 minutes
35℃< Ttc<40℃, keep the angle
Ttc＞40℃, -1 degree / 2 minutes, and reduce to 0 degree gradually
1.4 4-way valve control
The 4-way valve control in defrosting: refer to the defrosting procedure.
4-way valve control in other modes:
In heating mode, 4-way valve will open in 15 seconds after compressor starts up. When compressor
not startup or in non-heating mode, 4-way valve will close to ensure the compressor has stopped for at
least 2 minutes.
Commercial Air Conditioner
~22℃
~50 50~80
230 220
~6℃
~50 50~80
200 180
~20 ~30 ~40
2 2 1
2 2 1
36
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
80~ ~50
240 260
80~ ~50
220 240
~50 ~60 ~70
1 1 1
1 1 1
22℃~
50~80 80~
250 280
6℃~
50~80 80~
230 260
~80 ~90 90~
1 2 2
1 1 1
Max. modification
Max. -5
Max. +5
Max. -5
Max. +5