York YHKJXH012BAM--FX Service Manual page 110

Send oil return signal
Inverter compressor indicated FQY
outdoor motor
4-way valve
PMV auto open angel
all indoor motor ON
Quit condition of oil return
OR
60s
0HZ
5s
auto
ON
OFF
450pulse
OFF
Max. 9 minutes（E）
OR Td‐Tcm＜20℃ for 30s（5 minutes later, begin to count）
Ts‐Tc＜15℃ for 30 秒（5 minutes later, begin to count）
＆
Running for min. 5 minutes（E）
oil return beginning
oil return frequency
auto（TC control）
300pulse（E）
110
oil return over
120s
Soft startup
0HZ
auto
15s
450 pulse
auto open angle
anti-freeze startup