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PRO-C 400i does not work. Differences to 300i?

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WinkleF

Starting Member

Posts: 1

1

Wednesday, July 12th 2023, 10:10am

PRO-C 400i does not work. Differences to 300i?

Hello,
I wanted to install a solar sync on my PRO-C (300i from 2013). Since it does not have the setting for it on the dial, I ordered a new PRO-C Controller (400i from 2021).
I used the same wiring and programmed it. Even it showed everything fine on the display - it never acitvated the sprinkler system.
Then I removed the solar sync, tried it again and got the same result.
I recognized the Base Modules coming with the Controllers are not compatible. (Mechanical blocking the fitting).

My question is:
-Are the Controllers compatible with the old system?
- What is the difference and how can I make it work?
I am glad for every hint.
Thank you winklef

mrfixit

Moderator

Posts: 1,510

Location: USA

2

Wednesday, July 12th 2023, 6:23pm

The new controller is 100% compatible with your system. If the Pro-C 3 was working, the 4 will also work.
Maybe the common wire is in the wrong place? The terminal is over to the left by itself at the bottom I believe. Post a picture if need be. Get the code at Imgbb.com.
Is the controller putting out approx 24 volts?
The outlet where it's plugged in is working?
Is the module lock on?
I would get it working then hook up the solar sync.

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