Haswill STC-9200 Quick Start Manual page 5

Time Condition 1: the real-time passes the preset
interval time F6 (IDF), a regular parameter for almost all
defrosting thermostats.
Time Condition 2: If the "defrosting method" you take is
the hot gas from the compressor reverse rotary when F10
= 1 (TDF = HTG), it will count the compressor's last stops
moment plus F5 (ac), which is a protective value to avoid
the compressor frequently startup and stops.
The operates method is just like page 1 shows;
6) F6 (IDF): Defrosting Cycle / Interval Time
7) F7 (ADF): Defrosting Lasting/Running Time
8) F8 (DTE): Defrosting Stop Temperature
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