The button controls how the timer behaves right now. Look at the bottom line of the display to see the indicator text shift as you press it:
The Sinotimer TM-630S has two operating modes:
If you are reading this, you have likely just purchased (or rediscovered) an —one of the most popular multi-functional digital timer relays on the industrial and DIY market. While the device is powerful, compact, and versatile, its user manual is notoriously dense and often lost or damaged. sinotimer tm-630s manual
SET TIME: Hold CLOCK → set min → CLOCK → hour → CLOCK → day → CLOCK SET PROGRAM: PROG → choose days → PROG → hour → PROG → minute → PROG (repeat for OFF) DELETE PROGRAM: Set ON and OFF times identical RUN: Switch to AUTO MANUAL ON/OFF: Use slider RESET ALL: Press RST with pin
Finding the exact manual for the can be difficult because it is a generic Chinese-manufactured device often sold under various brand names. However, the TM-630S is a standard Time Switch (Programmable Timer) used to control electrical appliances (lights, water heaters, fans, etc.) based on a set schedule. The button controls how the timer behaves right now
Forces the timer output to stay off constantly, bypassing all schedules.
If you are finished, press the button to save and exit to the main time screen. 6. Understanding the MANUAL Button Modes SET TIME: Hold CLOCK → set min →
Sinotimer TM-630S User Manual: The Complete Setup and Programming Guide