Energy Tech Laboratories DSH - Manual (Page 18)

JOHNSON CONTROLS
18
FORM 145.32-IOM1 (908)
COMFORT ALERT™ DIAGNOSTICS
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 flashing LED indicator
communicates the ALERT code and guides the service
technician more quickly and accurately to the root cause
of a problem.
This module provides compressor
protection and will shut down the com-
pressor when compressor damaging
conditions are detected.
LED DESCRIPTION
POWER LED (Green): indicates voltage is present at
the power connection of the module.
ALERT LED (Yellow): communicates an abnormal sys-
tem 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 consecu-
tive flashes, defined as the Flash Code, correlates to a
particular abnormal condition. Detailed descriptions of
specific ALERT Flash Codes are shown in two tables
attached to 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 indi-
cates the compressor protector is open or may indicate
missing supply power to the compressor. A flashing
TRIP LED indicates the anti-short cycle timer is active,
preventing compressor from starting.
INTERPRETING THE DIAGNOSTIC LEDS
When an abnormal system condition occurs, the Comfort
Alert module displays the appropriate ALERT and/or
TRIP LED. The yellow ALERT LED will flash a number of
times consecutively, pause and then repeat the process.
To identify a Flash Code number, count the number of
consecutive flashes. Every time the module powers up,
the last ALERT Flash Code that occurred prior to shut
down is displayed for one minute. If the yellow ALERT
LED is on solid more than 2 amps are conducted through
the PROT terminal. The contactor coil may be shorted
or the PROT terminal miswired.
Some ALERT codes indicate a compressor damaging
condition and the Comfort Alert module will shut down
and lock out the compressor. Refer to the tables below
to identify ALERT codes that result in a lock out.