Haswill STC-9200 Quick Start Manual page 3

again.
Step 4: Switch to the "F2" ("HY") code by press the
Repeat the above 2-4 steps to update all the code you
want to.
At last: Just leave the unit alone; it will auto quit from
setting mode back to normal status in 10s.
F1 (SET): SP (Temperature Set-Point)
1)
F2 (HY): Temperature Hysteresis / Return Difference
2)
F3 (US): Upper limit for SP
3)
F4 (LS): Lower limit for SP
4)
5) F5 (AC): Delay Time for the Compressor and Delay
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key.