Super Match
3.2 Outdoor unit control
3.2.1 Outdoor frequency control
A. Compressor running frequency range: 3U19:20-100RPS 3U24:20-94RPS, the others are 20~95RPS
3.2.2 Electronic expansion valve (EEV) control
A: Electronic characteristic
Max. open angle 500 pulse
Driving speed PPS
B: Standard open angle control
In Cool/Dry mode, standard open angle: outdoor ambient temp.≥20
o
C, 250 pulse(E);Outdoor ambient
temp.<20
o
C, 210 pulse(E);
In Heat mode, standard open angle: outdoor ambient temp.≥10
o
C, pulse (E);outdoor ambient
temp.<10
o
C, 210 pulse (E).
E. 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.
Cooling mode Indoor modiîš¿cation angle
100
o
C<discharging temp.
+50degree/30seconds, it will stop until up to the max. permitted
opening angle
90
o
C< discharging temp.<=100
o
C Keep the angle
<=90
o
C -5degree/30seconds, and reduce to 0 degree gradually
Heating mode Indoor modiîš¿cation angle
100
o
C<discharging temp.
+50degree/30seconds, it will stop until up to the max. permitted
opening angle
90
o
C< discharging temp.<=100
o
C Keep the angle
<=90
o
C -5degree/30seconds, and reduce to 0 degree gradually
3.2.3 4-way valve control in heating
Multi: Protection when 4-way valve can not reverse in heating: 10 minutes later after compressor startup, if
indoor coil average temp. is below 15degree and keeps for 1 minute, the unit will stop and occur the 4-way
valve protection.
compressor ON
OFF
4-way valve ON
OFF
15 S（E）
2 minutes and 55s
3.2.4 Electric heater control
If compressor has not run for a long time, the refrigerant will deposit on the bottom of compressor and mix with
the refrigeranr oil. When re-startup, because low pressure reduces, refrigerant will be segregated from the
refrigerant oil and cause soam in the oil, which will make compressor exhaust a lot of oil. Therefore please stop
heating the compressor bottom to ensure the low pressure in startup period should not go down greatly.
• Ambient temp. TA≤27degree, when compressor stops, the electric heater will be electried.
• When TA≥32degree, or compressor running, the electric heater will be off.
Heater ON
OFF
Ambient temp. TA(℃) 27 32
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