Haier 3U19FS1ERA Service Manual - Page 87
Max. 9 minutes E
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>_]]VbTZR\ _^UZdZ_^Vb After oil return in cooling mode, the quit condition of refrigerant eliminated: 1 minute later after oil return is over ＆ Td‐Tc＞30℃ OR OR Ts‐Tc2AVE＞30℃ Tc2AVE＜‐35℃ Max. 10 minutes Oil return procedure in heating mode: Send oil return signal oil return begins oil return over Inverter compressor indicated FQCY 60s oil return FQCY 60s soft startup Outdoor motor 0HZ AUTO 5s AUTO (TC control) 0HZ AUTO 4-way valve ON OFF 450pulse All expansion valves auto angle 350pulse(E) 15s 450pulse auto angle All indoors ON OFF anti-freezed startup Quit condition of oil return: Max. 9 minutes (E) OR OR Td‐Tc＜20℃ for 30s continuously(5 minutes later, begin to count) ＆ Ts‐Tc2AVE＜15℃for 30s continuously(5 minutes later, begin to count) Running for min. 5 minutes(E) -86-
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