Haier 1U71S2SG1FA Service Manual page 214

2.3 Outdoor Unit Control
Outdoor Frequency Control
A.Compressor running frequency range:
1U: 30-91RPS
3U55: cooling--20~100RPS, heating---20~110RPS
3U75: cooling--20~100RPS, heating---20~110RPS
The others: cooling--20~90RPS, heating---20~95RPS
B.Defination of high-efficiency operation and its frequency control
In order to meet the cooling request at a high ambient temperature and the heating request at low ambient
temperature, we set the high-efficiency operation.
Entering condition: cooling mode, Tao≥33
Electronic Expansion Valve (EEV) Control
A: Electronic characteristic
Max. open angle 470 pulse
Driving speed
B: Initialization of EEV
EEV driving speed: open direction: 32MS; close direction: 32MS
C: Open angle limitation of EEV
Unitary
Cool/Dry
Heat
Adjustable Upper
Unit Stop
Cool/Dry 5(E)
Heat 50(E)
D: Standard open angle control
Unitary: In Cool/Dry mode, standard open angle: outdoor ambient temp.≥22
o
temp.≤22 C, 210pulse (E);
In heat mode, standard open angle: outdoor ambient temp.≥6
o
temp. ≤6 C, 160pulse (E)
Multi: In Cool/Dry mode, standard open angle: outdoor ambient temp.≥20
o
temp.<20 C, 210 pulse(E);
In Heat mode, standard open angle: outdoor ambient temp.≥10
o
temp.<10 C, 210 pulse (E).
F: When discharging temp. Td is too high or too low, modify the EEV angle Unitary
Mode
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
Multi: In order to cooperate the compressor discharging temp. over high protection, the system will enlarge the
EEV open angle. Within 5 minutes after compressor starts up, it will not modify. The detecting period is 30 seconds.
o
C( E), heating mode, Tao≤5
PPS
Thermostat ON
limit
Standard Open
470(E)
Angle+Tolerance
Standard Open
470(E)
Angle+Tolerance
Modification Process
o
C( E)
Unit Stop
300(E)
300(E)
Thermostat OFF
5(E)
50(E)
o
C, 260pulse (E);Outdoor ambient
o
C, 240pulses (E) ;Outdoor ambient
o
C, 250 pulse(E);Outdoor ambient
o
C, pulse (E);outdoor ambient
211
Adjustable Upper Limit
470(E)
470(E)
Adjustable Lower
Limitation
250(E)
250(E)
Max. Modification