For the following units:  SB-III 30 SR+, SB-III 30 SR TCI-2, Super II 30 SR+ Thermoguard µP IV, Super II SR TCI-2 Thermoguard µP IV, SB-190, SB-200, SB-300, SB-400, Super II 190 Thermoguard µP VI Controller and SB-210, SB 310, SB-410 with SR-2 Controller. 0. No Alarms Exist 2. Evaporator Coil Sensor 3. Control Return