Irritrol Total Control "Short" Error on All Zones – Pump Relay or Controller

"Short 1" through "Short 6" on an Irritrol Total Control indicates a short circuit affecting all zones.

Diagnosis Steps

1. Check for wire on MV (master valve) terminal—if present, disconnect. If error clears, pump relay is shorting.
2. If no MV wire, disconnect common field wire at controller.
3. Turn on one zone manually. If error persists, controller is faulty.
4. If error clears, short is in field wiring or solenoid.

Background

System converted from 12 zones/3 heads to 6 zones/2 valves with deeper well. Wiring changes may have introduced shorts.