| Problem | Possible Cause | Solution | | :--- | :--- | :--- | | Display is blank | No power / Tripped breaker. | Check wiring and ensure Live and Neutral are connected correctly. Check circuit breaker. | | Timer not switching | Unit is in Manual Mode. | Press [MANUAL] until "AUTO" is displayed. | | Timer switches at wrong time | Incorrect Clock Time or AM/PM setting. | Re-check the current time setup. Ensure you distinguish between AM and PM (look for the PM dot on the LCD). | | Appliance won't turn on | Load exceeds rating. | If using a large motor or heater, you may need an external Contactor. The TM-630S has a limit (usually 25A). | | Settings lost after power cut | Battery drained. | Keep the unit connected to power for a few hours to recharge the internal battery. | | Screen is hard to read | Low ambient temperature. | LCDs slow down in cold environments (<0°C). The unit will still function, but the display may be sluggish. |
WARNING: Risk of Electric Shock. Always turn off the main power before wiring. sinotimer tm-630s manual
The TM-630S usually features a 3-Wire Terminal Block: | Problem | Possible Cause | Solution |
Wiring Diagram Concept:
[Mains Power]
Live (L) -------------> Terminal 1 (L In)
Neutral (N) ----------> Terminal 2 (N)
[Appliance/Load]
Live Wire -----------> Terminal 3 (L Out)
Neutral Wire --------> Connected directly to Mains Neutral (Terminal 2)
Before programming, you must understand what the device can do. The Sinotimer TM-630S is a microcomputer-based time switch with a liquid crystal display (LCD). WARNING: Risk of Electric Shock
The Sinotimer TM-630S is a programmable digital time switch designed to automatically control the power supply to appliances. It features a built-in battery backup to save settings during power outages and a large LCD display.
Key Features: