# IIC-400WiFi Sprinkler Controller

**URL:** <https://community.inkbird.com/t/iic-400wifi-sprinkler-controller/167153>\
**Category:** Questions & Answers\
**Created:** [June 8, 2026, 5:14pm UTC](https://community.inkbird.com/t/iic-400wifi-sprinkler-controller/167153 "2026-06-08T17:14:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![PaulPanzer](https://avatars.discourse-cdn.com/v4/letter/p/a698b9/32.png) [@PaulPanzer](https://community.inkbird.com/u/PaulPanzer)\
**Post date:** [June 8, 2026, 5:14pm UTC](https://community.inkbird.com/t/iic-400wifi-sprinkler-controller/167153/1 "2026-06-08T17:14:18Z")

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When I measure the output voltage at terminals “M” and “C,” I already get 2.7 VAC when the system is off; when a zone is turned on, it’s 30 V. This means that my connected relay is always energized, even though it hasn’t actually engaged yet. Is this normal?

Thank you very much.

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**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\
**Post date:** [June 24, 2026, 9:28am UTC](https://community.inkbird.com/t/iic-400wifi-sprinkler-controller/167153/2 "2026-06-24T09:28:34Z")

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Hello,  
Perhaps you could connect a 24VAC, 1A solenoid valve for testing (please ensure the voltage is correct; it cannot be 24VDC/9V/110V/220V, etc.)? If using a master valve, please ensure the total current of the master valve + solenoid valve does not exceed 1A. Considering the possibility of inrush current, it’s better to limit it to within 0.8A.  
Because using a multimeter may produce false voltage readings, it is recommended to rely on the solenoid valve’s actual performance.

Also, please ensure the IIC-400-WIFI wiring is correct.

 ![image](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/1/1e0f688fc97548ab97c6d2112bec614b000ce4e4.png)