York YHKMXH009BARR-FX Service Manual page 81

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3.3.2 Initialization of EEV
EEV driving speed: open direction: 32MS; close direction: 32MS
3.3.3 Open angle limitation of EEV
Unit stop
5（E）
Cool/dry
heat 60（E）
3.3.4 Standard open angle control
In Cool/Dry mode, standard open angle: outdoor ambient temp.≥20℃, 250 pulse(E);
In Heat mode, standard open angle: outdoor ambient temp.≥10℃, pulse (E);
3.3.5 When discharging temp. Td is too high, modify the EEV angle.
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
100℃<discharging temp.
90℃< discharging temp.<=100℃
<=90℃
Heating mode
100℃< discharging temp.
90℃< discharging temp.<=100℃
<=90℃
3.4 4-way valve control in heating
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
3.5 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
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Adjustable upper Thermostat ON
limitation
450（E）
standard open
angle+tolerance
450（E） standard open
angle+tolerance
Outdoor ambient temp.＜20℃, 210 pulse(E);
outdoor ambient temp.＜10℃, 210 pulse (E).
+50degree/30seconds, it will stop until up to the max. permitted
-5degree/30seconds, and reduce to 0 degree gradually
+50degree/30seconds, it will stop until up to the max. permitted
-5degree/30seconds, and reduce to 0 degree gradually
15s（E）
Thermostat
OFF
5（E）
60（E）
Indoor modification angle
opening angle
Keep the angle
Indoor modification angle
opening angle
Keep the angle
2minutes and 55s
-80-
Adjustable lower
limitation
80（E）
80（E）