TRIP LED (Red): indicates there is a demand signal from the thermostat but no current to the compressor is detected by the module.TheTRIP LED typically indicates the compressor protector is open or may indicate missing supply power to the compressor.
The scroll compressor’s run (R), common (C) and start (S) wires are routed through the holes in the Comfort AlertTM module marked “R,” “C” and “S.”
24 VAC Power Wiring — The Comfort AlertTM module requires a constant nominal 24 VAC power supply. The wiring to the module’s R and C terminals must be directly from the indoor unit or thermostat.
The Comfort AlertTM module requires a thermostat demand signal to operate properly.
NOTE: After the thermostat demand signal is connected, verify that 24 VAC across Y and C when demand is present.
TROUBLESHOOTING
Interpreting The Diagnostic LEDs – When an abnormal system condition occurs, the Comfort AlertTM module displays the appropriate ALERT and/or TRIP 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. The module will continue to display the LED until the condition returns to normal or if 24 VAC power is removed from the module.
Cooling — Gradually lower the thermostat temperature setpoint below the actual room temperature and observe that the outdoor unit and indoor blower energize. Feel the air being circulated by the indoor blower and verify that it is cooler than ambient temperature. Listen for any unusual noises. If present, locate and determine the source of the noise and correct as necessary.
Heating — Lower the thermostat setpoint temperature to the lowest obtainable setting and set the thermostat function switch to HEATING. The indoor blower and outdoor unit should stop running.After a minimum of five minutes, increase the setpoint temperature of the thermostat to the maximum setting.Verify that the outdoor unit and indoor blower have energized. Feel the air being circulated by the indoor blower and verify that it is warmer than ambient temperature. Listen
POWER
ALERT
TRIP
Figure 2. Comfort AlertTM Diagnostics
Module
11
