Emerson Comfort Alert 543-0038-02 - Comfort Alert Diagnostics Overview; LED Indicators; Product Specifications

2
Comfort Alert
™
Diagnostics – Faster Service And Improved Accuracy
The Comfort Alert diagnostics module is a breakthrough innovation for troubleshooting
and protecting three phase Copeland Scroll
™
compressors. The module installs easily in
the electrical box of the condensing unit near the compressor contactor. By monitoring
and analyzing data from the Copeland Scroll compressor and the thermostat demand,
the module can accurately detect the cause of electrical and system related failures and
protect the compressor. A fl ashing LED indicator communicates the ALERT code and
guides the service technician more quickly and accurately to the root cause of a problem.
NOTE: This module provides compressor protection and will shut down
the compressor when compressor damaging conditions are detected.
LED Description (Figure 1)
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 fl ash code. The ALERT LED
will fl ash a number of times consecutively, pause and then
repeat the process. The number of consecutive fl ashes,
defi ned as the Flash Code, correlates to a particular
abnormal condition. Detailed descriptions of specific
ALERT Flash Codes are shown in two tables on pages 8
and 9 of this manual.
TRIP LED (Red): indicates there is a demand signal from
the thermostat but no current to the compressor is detected
by the module. The TRIP LED typically indicates the
compressor protector is open or may indicate missing
supply power to the compressor. A fl ashing TRIP LED
indicates the anti-short cycle timer is active, preventing
compressor from starting.
Product Specifi cations
Operating Temperature: -40° to 150° F (-40° to 65° C)
Storage Temperature: -40° to 175° F (-40° to 80° C)
Power Supply Range: 18-30VAC, 48-62 Hz
Power Requirement: 2.0 VA nominal (without solenoid on – single stage)
7.0VA nominal (with solenoid on – two stage)
UL Restrictions: Use only with Class 2 circuits.
This 543-0038 module is designed only for three phase systems with Copeland Scroll
compressors that have internal overload protection. The software in this Comfort Alert
module is compatible with single stage (543-0038-02 or 943-0038-02) or two stage
(543-0038-01 or 943-0038-01) two-stage scroll systems.
Figure 1
UL File #SA8958