The Brain

An irrigation tech knowledge base, by BoardTronics.

Topics include troubleshooting, how-to's, and more!


Multiple stations are not turning on or are stuck on

  • Check the 24-VAC indicator lights on each 8-Station Output Board and on the Pump Common. They should all be illuminated.
  • If none of the lights are on:
    • Check the 3.2A fuse on the Power Supply, which provides the 24-VAC power to the station outputs.
    • If the 3.2A fuse is good, use a voltmeter to check for 24-VAC at the 2-wire connector on the 24-VAC Connector Group.
    • If 24V is present here, the 24-VAC Connector Group is at fault and should be replaced with a new one.
    • If 24V is not present at the connector, check for 24-VAC at the output connector on the Power Supply.
    • If 24V is present here, then the wiring harness running from the Power Supply and the 24-VAC Connector Group is faulty and should be replaced.
    • If 24V is not present at the output connector on the Power Supply, the problem lies with the Power Supply itself, and it must be repaired.
  • If all lights are on:
    • Ensure that the "Common" switch at the top of the Pump Common(s) is in the "Auto" position.
    • Check the Common indicator lights on the Pump Common(s).
    • If the indicator lights are not on, move components, one at a time, from the nonfunctioning satellite to a known functioning satellite in order to pinpoint which component is causing the problem, as a faulty component will also cause problems in the known functioning satellite. Begin with the Pump Common, and if necessary, continue in order with the Timing Mechanism, 40-Pin Cable, the Output/Pump Cable connecting to the Pump Common, and the Power Distribution Board. The faulty component must be repaired or replaced with a new one.


HOW TO: Check voltages

Look for the three voltage indicator lights on the Power Distribution Board. When on, these lights show the presence of 5V, 9V, and 12V, as indicated on the board. If none of the of the voltage indicator lights on the Power Distribution Board are on...

HOW TO: Reinitialize a Timing Mechanism

Press the "Satellite Settings" button. Use the Down Arrow button to move down to the line that reads "Reset Unit: No". Turn the knob to change the "No" to "Yes", then press the Down Arrow button one more time. This screen...

ISSUE: 8 consecutive stations are not turning on

Determine which 8-Station Output Board is linked to the eight stations that are not coming on. Check the 24VAC indicator light on the corresponding 8-Station Output Board. See the picture below...

ISSUE: A single station is not turning on or is stuck on

The first step to resolving this issue is checking the 8-Station Output Board: Check the LED indicator lights on the corresponding 8-Station Output Board. If one is stuck on, the 8-Station...

ISSUE: Timing Mechanism is dead

Move the Timing Mechanism to a known functioning satellite. If the Timing Mechanism is still not getting any power, this points to an internal problem with the Timing Mechanism and it should be repaired or replaced...

ISSUE: Timing Mechanism is reporting the wrong number of stations

Remove the Timing Mechanism from the satellite and install it into a different functioning satellite and see if the reported number of stations is correct. If still incorrect, reinitialize...

ISSUE: Timing Mechanism is running slowly

This issue is a symptom of an internal processor failure within the Timing Mechanism; the Timing Mechanism should be reconditioned.

ISSUE: Timing Mechanism not communicating with central computer

Check the RX/TX indicator lights on the Modem. Normal operation is for the RX light to come on often and the TX light to come on occasionally. If both lights remain off: Check the fuses on the...