Haier AB25S2SC1FA Service Manual page 136

Quit condition of oil return:
＆
OR
Max. 10 minutes
Oil return procedure in heating mode:
Send oil return signal
Inverter compressor indicated FQY
outdoor motor auto
4-way valve
PMV auto open angel
all indoor motor ON
OFF
Quit condition of oil return
Max. 9 minutes（E）
OR
＆
1 minute later after oil return is over
Td‐Tcm＞30℃
OR Ts‐Tc＞30℃
Tc＜‐35℃
oil return beginning
60s oil return frequency
0HZ
5s
auto（TC control）
ON
OFF
450pulse
300pulse （E）
OR Td‐Tcm＜20℃ for 30s（5 minutes later, begin to count）
T s ‐Tc＜15℃ for 30 S（5 minutes later, begin to count）
Running for min. 5 minutes（E）
134
oil return over
120s
Soft startup
0HZ
auto
15s
450 pulse
auto open angle
anti-freeze startup