York YU2E18YJ6AMHO-Y, Service Manual, Page: 17 / 124

17
CoolReturnI The difference between current limit
and shutdown current
CoolT4Zone5I Cooling T4
≥
50
℃
current limit value
CoolT4Zone4I Cooling 49
＞
T4
≥
45
℃
current limit
value
CoolT4Zone3I Cooling 44
＞
T4
≥
41
℃
current limit
value
CoolT4Zone2I Cooling 40 ﹥
T4
≥
33
℃
current limit
value
CoolT4Zone1I Cooling 32
＞
T4
℃
current limit value
CoolStopI Cooling stop protection current value
Heating mode:
℃
15
14
HeatT4Zone4I
10
9 HeatT4Zone3I
6
5
HeatT4Zone2I
HeatT4Zone1I
HeatReturnI
The difference between current limit
and shutdown current
HeatT4Zone4I
Heating
T4
≥
15
℃
current limit
value
HeatT4Zone3I
Heating
14
＞
T4
≥
10
℃
current
limit value
HeatT4Zone2I
Heating
9
＞
T4
≥
6
℃
current limit
value
HeatT4Zone1I
Heating
5
＞
T4
current limit value
HeatStopI
Heating stop protection current
value
5.3.7 Indoor / Outdoor Units Communication
Protection
If the indoor units do not receive the feedback
signal from the outdoor units for 2 consecutive
minutes, the unit stops. The unit displays the
failure code.
5.3.8 High Condenser Coil Temp. Protection
5.3.9 Outdoor Unit Anti-Freezing Protection
When T2<4
℃
for 250seconds or T2<0
℃
, the
indoor unit capacity demand is zero and resumes
normal operation when T2>8
℃
and the protection
time is no less than 3 minutes.
5.3.10 Oil Return
Rules for Operation
1. If the compressor frequency continues to be
lower than the frequency set for setting time, the
unit raises the frequency to the frequency set for
setting time and then resumes with the former
frequency.
2. The EXV continues at 300p while indoor units
maintain their operation.
T3
Resume
Off
Decrease
Hold
℃
CoolT4Zone5I
50
49
45
CoolT4Zone4I
44
41
40
CoolT4Zone3I
33
32
CoolT4Zone2I