8
Status LED Status LED Description Status LED Troubleshooting Information
Green “POWER” Module has power Supply voltage is present at module
terminals
Red “TRIP”
LED On Solid
Thermostat demand signal
Y is present, but the com-
pressor is not running
1. Compressor protector is open
2. Condensing unit power disconnect is
open
3. Compressor circuit breaker or fuse(s)
is open
4. Broken supply wires or connector is not
making contact
5. Compressor power wires not routed
through Comfort Alert
6. Compressor contactor has failed open
Red “TRIP”
LED Flashing
The anti-short cycle timer (3 minutes), in module is preventing compres-
sor restart.
still active. The TRIP LED will again fl ash for the duration of the anti short cycle time,
after the anti short timer expires, the Trip LED will illuminate and remain solid as long
as the compressor power remains disconnected and demand is still present. If the red
LED does not function as described, refer to Table 1 to verify the wiring.
Installation Verifi cation for Models 543-0038-01, 943-0038-01, 543-0071-00,
543-0038-02, 943-0038-02
Disconnect power to the compressor and force a call for cooling. The red TRIP LED
will immediately come on solid. If the red LED does not function as described, refer to
Table 1 to verify the wiring.
*Note: For these models, the anti-short cycle feature will become active after one hour
of total run time or after 50 normal run cycles which ever comes fi rst.
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