Check your 24v at DZ1 and DZ2 in the controller. There’s a lot of voltage drop possible in that circuit. You want to adjust the power supply so you have at least 23.5 there. If that voltage is much lower than P24 you could be loosing voltage through the DZE relay on the 188E, either contacts or pins in the relay base. This is one of the places Schrack relays in blue bases can be a real problem. If DZ1 differs much from DZ2 you could have a bad travel cable wires on one of the 2. If it’s happening that often you should be able to see one of the 2 IOs not coming in with the other or with a meter on DZ1 and another on DZ2. And of course it could be the main sensor card.
