York YHKE09XEEAMH-RX Service Manual page 29

The auto fan acts as below rules:
T1-TS
a
b
8.4.2.4 Condenser temperature protection
For 7K INDOOR, YHKE09XEEAMH-RX,
YHKE12XEEAMH-RX models,
T3
Decrease
Hold
Resume
For YHKE18XEEAMH-RX,
YHKE24XEEAMH-RX models,
T3
Decrease
Hold
Increase
Resume
8.4.2.5 Evaporator temperature protection
When Evaporator temperature temp.is less
than setting value, the compressor will stop.
8.4.3 Heating Mode
c
d
e
Off
Off
8.4.3.1 Compressor running rules
When T1-Ts>-ΔT, the compressor will stop,
<ΔT-1.5， the compressor will be on.
when T1-T
S
ΔT is the programmed parameter of
temperature compensation.
When the AC run in mute mode, the
compressor will run with low frequency.
When the current is more than setting value,
the current protection function will be activated
and the compressor will stop.
8.4.3.2 Outdoor fan running rules
The outdoor unit will be run at different fan
speed according to T4.
For different outdoor units, the fan speeds are
different.
For 7K INDOOR, YHKE09XEEAMH-RX,
YHKE12XEEAMH-RX models,
The fan speed is controlled by T4 and
compressor frequency.
&f
T4&frequency
For YHKE18XEEAMH-RX,
YHKE24XEEAMH-RX models,
T4
E
D
C
B
A
A+
8.4.3.3 Indoor fan running rules
When the compressor is on, the indoor fan can
27
D
C
B
A
A+