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After oil return in cooling mode, the quit condition of refrigerant eliminated:
1 minute later after oil return is over
＆ Td Tc‐ ＞30°C
OR OR Ts Tc2AVE‐ ＞30°C
Tc2AVE＜ 35‐ °C
Max. 10 minutes
Oil return procedure in heating mode:
Quit condition of oil return:
Send oil return signal oil return begins oil return over
Inverter compressor indicated FQCY 60s oil return FQCY 60s soft startup
0HZ 0HZ
5s
Outdoor motor AUTO AUTO
AUTO (TC control)
4-way valve ON
OFF 15s
450pulse 450pulse
350pulse(E)
All expansion valves auto angle auto angle
All indoors ON
OFF anti-freezed startup
Max. 9 minutes (E)
OR OR Td Tc＜20°C‐ for 30s continuously(5 minutes later, begin
to count)
＆ Ts Tc2AVE‐ ＜15°C for 30s continuously(5 minutes later,
begin to count)
Running for min. 5 minutes(E)
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