Carrier 17/19EX Refrigerator User Manual


 
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