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WARNING
!
THE MANUFACTURER'S WAR-
RANTY DOES NOT COVER ANY
DAMAGE OR DEFECT TO THE AIR
CONDITIONER CAUSED BY THE
ATTACHMENT OR USE OF ANY
COMPONENTS, ACCESSORIES OR
DEVICES (OTHER THAN THOSE
AUTHORIZED BY THE MANUFAC-
TURER) INTO, ONTO OR IN CON-
JUNCTION WITH THE AIR CONDI-
TIONER. YOU SHOULD BE AWARE
THAT THE USE OF UNAUTHORIZED
COMPONENTS, ACCESSORIES
OR DEVICES MAY ADVERSELY
AFFECT THE OPERATION OF THE
AIR CONDITIONER AND MAY ALSO
ENDANGER LIFE AND PROPERTY.
THE MANUFACTURER DISCLAIMS
ANY RESPONSIBILITY FOR SUCH
LOSS OR INJURY RESULTING
FROM THE USE OF SUCH UNAU-
THORIZED COMPONENTS, ACCES-
SORIES OR DEVICES.
FIGURE 1
LED DESCRIPTION
2. Quick Reference Guide For R-410A
• R-410A refrigerant operates at approximately 60% higher pressure (1.6 times) than
R-22. Ensure that servicing equipment is designed to operate with R-410A.
• R-410A refrigerant cylinders are pink.
• R-410A, as with other HFC's is only compatible with POE oils.
• Vacuum pumps will not remove moisture from POE oil.
• R-410A systems are to be charged with liquid refrigerants. Prior to March 1999,
R-410A refrigerant cylinders had a dip tube. These cylinders should be kept upright
for equipment charging. Post March 1999 cylinders do not have a dip tube and
should be inverted to ensure liquid charging of the equipment.
• Do not install a suction line filter drier in the liquid line.
• A liquid line filter drier is standard on every unit.
• Desiccant (drying agent) must be compatible for POE oils and R-410A.
3. Evaporator Coil / TXV
The thermostatic expansion valve is specifically designed to operate with R-410A. DO
NOT use an R-22 TXV. The existing evaporator must be replaced with the factory
specified TXV evaporator specifically designed for R-410A.
4. Tools Required For Installing & Servicing R-410A Models
Manifold Sets:
-Up to 800 PSIG High side
-Up to 250 PSIG Low Side
-550 PSIG Low Side Retard
Manifold Hoses:
-Service Pressure Rating of 800 PSIG
Recovery Cylinders:
-400 PSIG Pressure Rating
-Dept. of Transportation 4BA400 or BW400
CAUTION
!
R-410A systems operate at higher pressures than R-22 systems. Do not use
R-22 service equipment or components on R-410A equipment.
D. COMFORT ALERT™ SYSTEM (5 TON RACA14/15 MODEL ONLY)
1. Comfort Alert™
The Comfort Alert™ diagnostics module is for troubleshooting air conditioning system
failures. By monitoring and analyzing data from the compressor and the thermostat
demand, the module can accurately detect the cause of electrical and system-relat-
ed failures without any external sensors. A flashing LED indicator communicates the
ALERT code and guides the service technician more quickly and accurately to the root
cause of a problem.
POWER LED (Green): indicates voltage is present at the power connection of the
module.
ALERT LED (Yellow): communicates an abnormal system condition through a unique
flash code. The ALERT LED will flash a number of times consecutively, pause and
then repeat the process. The number of consecutive flashes, defined as the Flash
Code, correlates to a particular abnormal condition. Detailed descriptions of specific
ALERT Flash Codes are shown in the Comfort Alert Diagnosis Chart in this manual.
TRIP LED (Red): indicates there is a demand signal from the thermostat but no cur-
rent to the compressor is detected by the module. The TRIP LED typically indicates
the compressor internal overload protector is open or may indicate missing high volt-
age supply power to the compressor.
5
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