Airwell YUDA060, Service Manual

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3.2 Outdoor frequency control
3.2.1 Compressor running frequency range: 30-91RPS.
3.3 Electronic expansion valve (EEV) control:
3.3.1 Electronic characteristic:
Max. open angle 500 Pulse
Driving speed
PPS
3.3.2 Initialization of EEV
EEV driving speed: open direction: 32MS; close direction: 32MS
3.3.3 Open angle limit of EEV
Unit stop Adjustable
upper limit
Cool/dry 250
（
E
）
480
（
E
）
heat 250
（
E
）
480
（
E
）
3.3.4 6
、
Standard open angle control
In Cool/Dry mode, standard open angle: outdoor ambient temp.
≥
22 ℃ , 260pulse (E)
Outdoor ambient temp.
≤
22 ℃ , 210pulse (E)
In heat mode, standard open angle: outdoor ambient temp.
≥
6 ℃ , 240pulses (E)
Outdoor ambient temp.
≤
6 ℃ , 160pulse (E)
3.3.5 When discharging temp. Td is too high or too low, modify the EEV angle
mode Modification process Max.
modification
Cooling If TD>106 degree and -1 degree /2 minutes, open
angle keeps between 106-50 . -3
Cooling If TD<50 degree and +1 degree /2 minutes, open
angle keeps between 50-106. +3
Heating If TD>100 degree and -1 degree /2 minutes, open
angle keeps between 100-50 . -3
Heating If TD<50 degree and +1 degree /2 minutes, open
angle keeps between 50-100 +3
3.4 4-way valve control in heating
50s later after compressor start up, the 4-way valve start to operate. When compressor stops
or unit is not in heating mode, the 4-way valve is closed after compressor stop for 2 minutes
and 55s.
compressor ON
OFF
4-way valve ON
OFF
50
秒（
E
）
2 minutes and 55s
3.5 Control of defrosting in heating
In heating mode, defrosting temp. sensor Te will check the frosting condition of outdoor heat
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