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.
Installation Check
To verify the installation of Comfort Alert is correct, two functional tests can
be performed. Disconnect power from the compressor and force a thermostat call for
cooling. The red Trip LED should turn on indicating a compressor trip as long as
24VAC is measured at the Y terminal. If the red LED does not function as described,
refer to Table 1 to verify the wiring.
For all models (except for 543-0010-01, 943-0010-01), the second functional test can
be performed. Disconnect power from the compressor and 24VAC from Comfort Alert.
Remove the wire from the Y terminal of Comfort Alert, reapply 24VAC power to Com-
fort Alert and reconnect power to the compressor. Force a thermostat call for cooling and
when the compressor starts to run, the yellow Alert LED will begin flashing a Code 8 in-
dicating a Welded Contactor. Disconnect power from the compressor and 24VAC from
Comfort Alert. While Comfort Alert is off, reattach the wire to the Y terminal. Reapply
power to compressor and 24VAC to Comfort Alert, the yellow Alert LED will flash the pre-
vious code 8 for 1 minute and then turn off. If the yellow LED does not function as de-
scribed, refer to Table 1 to verify the wiring.
Troubleshooting The Installation
Depending on the system configuration, some ALERT Flash codes may not be active.
The presence of safety switches affects how the system alerts are displayed by this
module. Refer to Figures 6 thru 10 for safety switch wiring.
Resetting Alert Codes
Alert codes can be reset manually and automatically. The manual method to reset an
Alert code is to cycle the power to Comfort Alert off and on. For automatic reset,
Comfort Alert continues to monitor the compressor and system after an Alert is detected.
If conditions return to normal, the Alert code is turned off automatically. Note: After power
on reset, the prior alert code will flash for 60 seconds.
Note: For 543-0010-01 and 943-0010-01 auto-reset is the only option available
for resetting alert codes.
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