16.0 ACCESSORIES
16.1 Remote Outdoor Temperature Kit (Part No. 47-102709-03)
This is a kit that has a longer remote sensor that can be installed away from the out-
door unit for better thermostat temperature display.
17.0 TROUBLESHOOTING
IMPORTANT: The JEC series units with the ICC (Integrated Compressor Control)
provide status and diagnostic information that greatly enhances the ability to quickly
diagnose system faults. Use the following troubleshooting guides as another tool in
system diagnostics.
NOTE: In diagnosing common faults in the cooling system, develop a logical
thought pattern as used by experienced technicians. The charts which follow are
not intended to be an answer to all problems but only to guide the technician’s
troubleshooting. Through a series of yes and no answers, follow the logical path to
a likely conclusion.
A novice technician should use these charts like a road map. Remember that the
chart should clarify a logical path to the solution.
17.1 Comfort Control
2
System™ Initial Startup
Connect the system.
There are four wires that need to be connected to each unit.
R 24 VAC
C 24 VAC common
1 Communications
2 Communications
Air Handler Air Conditioner
Furnace Heat Pump
Thermostat Indoor Outdoor
R – – – – – – – – – – – – – – – – – – R – – – – – – – – – – – – – R
1 – – – – – – – – – – – – – – – – – – 1 – – – – – – – – – – – – – 1
2 – – – – – – – – – – – – – – – – – – 2 – – – – – – – – – – – – – 2
C – – – – – – – – – – – – – – – – – – C – – – – – – – – – – – – – C
These wires need to be connected to each device thermostat, indoor air handler
and outdoor unit (heat pump or AC).
If the communications wires are wired backwards at any point the green LED (DS2)
will always be on. If this happens check the wires at each point to ensure they are
not reversed.
Once all devices are connected power up the line and low voltage to the system.
When all devices are powered the thermostat should detect the indoor and outdoor
units within 60 seconds. The air handler and outdoor units have a set of bias dip-
switches set at a factory default to the ON position. These dipswitches are for future
use DO NOT CHANGE DIP SWITCHES.
Once the system is powered the airflow settings will be configured for all devices.
The outdoor unit will send information to configure indoor airflow. If the indoor unit is
incapable of supplying the required airflow a d3 fault will be displayed on the ther-
mostat and outdoor unit.
All devices have a LEARN button. This button is for future use and currently has no
function at this time.
IMPORTANT: DO NOT USE A PHONE CORD TO CONNECT INDOOR AND OUT-
DOOR UNITS. THIS WILL DAMAGE THE CONTROLS.
IMPORTANT: DO NOT CONNECT THE SYSTEM TO A PHONE LINE. THIS WILL
DAMAGE THE CONTROLS.
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