Johnson Controls S1-TTSCC Instruction Manual page 40

1078329-UIM-A-0114
2. Disconnect power to the entire system that you wish to access a communications port (commu-
nication ports are outlined in the wiring section of this document).
3. Once power is disconnected, plug the harness into one of the communicating. terminals. Rout-
ing the harness so that the power can be re-applied (allowing for the door switches etc. where
applicable)
The control housings contain areas of high voltage. Always assure, when trouble shooting the
system, that a safe distance is maintained from high voltage. Below are illustrations that show
some of the high voltage areas.
COMMUNICATIONS
PORT
Outdoor Unit Communicating Terminals
FIGURE 16:
High Voltage Locations
FIGURE 17:
40
CONTROL BOARD
HEAT KIT
LOCATION
Johnson Controls Unitary Products
COMMUNICATIONS
HARNESS
JUNCTION
BOX