!
WARNING
TURN OFF ELECTRIC POWER AT
THE FUSE BOX OR SERVICE
PANEL BEFORE MAKING ANY
ELECTRICAL CONNECTIONS.
ALSO, THE GROUND CONNEC-
TION MUST BE COMPLETED
BEFORE MAKING LINE VOLTAGE
CONNECTIONS. FAILURE TO DO
SO CAN RESULT IN ELECTRICAL
SHOCK, SEVERE PERSONAL
INJURY OR DEATH.
16.4 Final Leak Testing
After the unit has been properly evacuated and charged, a halogen leak detector
should be used to detect leaks in the system. All piping within the condensing unit,
evaporator, and interconnecting tubing should be checked for leaks. If a leak is
detected, the refrigerant should be recovered before repairing the leak. The Clean
Air Act prohibits releasing refrigerant into the atmosphere.
17.0 ACCESSORIES
17.1 Dual Fuel Kit Model (Part No. RXME-A01)
This kit is required if this unit is installed in a dual fuel application.
17.2 Remote Outdoor Temperature Model (Part No. 47-102709-03)
This is a kit that has a longer remote sensor that can be installed away from the
outdoor unit for better thermostat temperature display.
18.0 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
trouble shooting. 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.
18.1 Serial Communicating 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 (D52)
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 45 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 has no function
at this time.
40
Summary of Contents for PRL-series
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