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The Brain

An irrigation tech knowledge base, by BoardTronics.

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

ISSUE:

Timing Mechanism is dead

If you are experiencing this issue, check the lights on the power supply module:

  • If the right-hand light is off, the circuit breaker may be blown. Reset it.
  • If the circuit breaker blows again, there is a short circuit somewhere in the satellite. One at a time, remove power from the satellite, disconnect the bottom Output Station Module from the one above it (flat cable and round wire), reset the circuit breaker, and reapply power. Continue until the short circuit is located. If the breaker still blows, and there are no more Output Station Modules connected, remove power from the satellite, disconnect the 8-position connector at the right-hand end of the power supply module, reset the breaker, and reapply power. If the circuit breaker still blows, the power supply module should be repaired.
  • If the right-hand light is off, but the circuit breaker isn't blown, then remove the power supply module and measure the voltage between the orange wires at the 4-pin connector that feeds it.
  • If you read between 25 and 30 volts AC, the power supply module should be repaired.
  • If you read something other than 25 to 30 volts AC, the problem is with the Power Transformer.
  • If the left-hand light is off, remove the power supply module and measure the voltage between the blue wires at the 4-pin connector that feeds it.
  • If the voltage is 9-10 volts AC, the power supply module should be repaired.
  • If the voltage is not within 9-10 volts AC range, the problem is with the Power Transformer and it should be replaced with a new one.
  • If the left-hand light is on, replace the Timing Mechanism with a known operational Timing Mechanism.
  • If the new Timing Mechanism also appears dead, then the power supply module should be repaired.
  • If the new Timing Mechanism works, the original Timing Mechanism should be repaired or replaced with a new one.