Carrier 17/19EX - Manual (Page 267)

Control Modules
The Processor module (PSIO), 8-input (Options) modules, Starter Management Module
(SMM), and the Local Interface Device (LID) module perform continuous diagnostic evaluations
of the hardware to determine its condition. Proper operation of all modules is indicated by LEDs
(light-emitting diodes) located on the side of the LID, and on the top horizontal surface of the
PSIO, SMM, and 8-input modules.
Click here for Table 9A — Thermistor Temperature (F) vs Resistance/Voltage Drop
Click here for Table 9B — Thermistor Temperature (C) vs Resistance/Voltage Drop
CAUTION CAUTION
!
Turn controller power off before servicing controls. This ensures safety and pre-
vents damage to controller.