Irrigation pump wont start


  #1  
Old 05-06-23, 12:13 PM
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Irrigation pump wont start

Hello,

my irrigation pump wont start. First attempt for the season. Breaker is on. No power betting to pump. Try and start some zones and nothing happens.

any advice on how to diagnose?







 
  #2  
Old 05-06-23, 12:21 PM
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There is no memory battery and the display is on which means it's getting some power.
First step is to check for 24vac on the red and white 24v transformer wires.

Apparently there are no fuses inside the unit and there is auto reset circuit breaker.
The manual discusses deleting the program and then reprogramming.
Try testing with sensor (SN) turned off in case it's got a problem.

If all else fails.... push the reset button on the right side.
It will delete all programming and reset the controller.

Downloadable Rainbird E(C) manual
 

Last edited by PJmax; 05-06-23 at 12:36 PM.
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Old 05-06-23, 12:40 PM
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Turn the timer control from OFF to AUTO. Do you have a well?
 
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Old 05-06-23, 01:11 PM
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Does SN refer to a rain sensor? I ripped (literally) that out during the winter. It never worked.

i’ve never used a program. A manually run stations.

water is drawn from a lake.

im done for the day. Will pick it up tomorrow or Monday. My new sod will get municipal water in the meantime.
 

Last edited by zhy987; 05-06-23 at 01:28 PM.
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Old 05-06-23, 01:20 PM
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Yes... SN is rain sensor and if disconnected will not allow the unit to operate.
Turn the switch off.
 
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Old 05-06-23, 01:55 PM
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Can you detail how to test red and white wires. I have a multimeter but havent gotten around to learning how to use it. Thank you.

SN change seems to have no impact.
 
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Old 05-06-23, 02:11 PM
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Ok. Im back at it. I tested the 24V red and white wires (2nd and 3rd from the left.). I get no reading. And the controller display goes blank during the test,

I used the multimeter setting below.


 
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Old 05-06-23, 02:55 PM
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Are these the right connections at the bottom?



 
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Old 05-06-23, 03:08 PM
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I switched the red connector to the middle port. Now, I get a reading of 28V.

whats next?
 
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Old 05-06-23, 03:25 PM
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No reading when I check resistance at Comm/MV.
 
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Old 05-06-23, 04:30 PM
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Common and MV terminals are different circuits and a resistance reading has no significance. Common terminal is one of the two 24 vac wires from the transformer and used for the return of all 24 vac loads. MV terminal is for a master valve (if used) or a power relay for a remote pump (if used). The power relay must have a 24 vac coil and its contacts must be rated for the pump motor AC amps and AC volts. The amp draw of the 24 vac coil (if used) or the master valve (if used) should not exceed MV terminal current output rating. If remote pump is controlled by MV terminal, follow manual for termination of unused zone outputs.
 
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Old 05-06-23, 04:48 PM
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Resolved. I caused my own issue. Ripping out the rain sensor last winter.

I tied the two wires together from the rain sensor and now the pump works as normal.

a user on Reddit suggested the Ohm reading on Commom/MV. That led us to the relay box outside. Once connected, the ohm reading went way up.
 
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Old 05-07-23, 01:07 PM
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If no sensor is attached to the controller, leave the wire loop in place that connects the two sensor
screws.


Turning the SN switch to off should have accomplished the same thing.
Possibly that switch is dirty or bad.

The left hand terminal port is labeled 10A and should ONLY be used when in amps mode.
All other measurements use center port.
 
 

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