Carrier 17/19EX - Manual (Page 53)

The PIC consists of 3 modules housed inside the 3 major components. The component
names and the control voltage contained in each component are listed below (also see
Table 1 ):
• control center
–
all extra low-voltage wiring (24 v or less)
• power panel
–
115 v control voltage
– up to 600 v for oil pump power
• starter cabinet
–
machine power wiring (per job requirement)
Processor Module (PSIO)
This module contains all of the operating software needed to control the machine. The open-
drive machines use a different software package within the PSIO than the hermetic machines.
There are also control hardware differences between the two types of machines. The 19EX
uses 3 pressure transducers and 8 thermistors to sense pressures and temperatures. The
17EX uses 4 pressure transducers and 7 thermistors to sense pressures and temperatures.
Click here for Table 1 — Major PIC Components and Panel Locations