NOTE: The correct Comfort Alert model must be used for the application (refer
to the Product Specifi cation section on page 2). If the wrong model is installed,
the ALERT Flash Codes for system faults will function incorrectly: the Comfort
Alert module may indicate system faults that are not present or fail to indicate
system faults that are present.
NOTE: Miswiring the Comfort Alert module will cause false LED codes. Table 1
describes LED operation when the module is miswired and what troubleshooting
action is required to correct the problem.
Miswired Module Indication
Green LED is not on,
module does not power up
Green LED intermittent,
module powers up only
when compressor runs
TRIP LED is on but system
and compressor check OK
TRIP LED and ALERT LED
fl ashing together
ALERT Flash Code 3
(Compressor Short Cycling)
displayed incorrectly
ALERT Flash Code 5 or 6
(Open Circuit, Missing
Phase) displayed
Incorrectly
ALERT Flash Code 8
(Welded Contactor)
displayed incorrectly
Recommended Troubleshooting Action
Determine if both R and C module terminals are
connected. Verify voltage is present at module's R and
C terminals. Review 24VAC Power Wiring (page 4) for
R and C wiring.
Determine if R and Y terminals are wired in reverse.
Verify module's R and C terminals have a constant
source. Review 24VAC Power Wiring (page 4) for R
and C wiring.
Verify Y terminal is wired properly per OEM wiring
diagram. Verify voltage at contactor coil falls below 0.5VAC
when off. Verify 24VAC is present across Y and C when
thermostat demand signal is present. If not, R and C are
reverse wired.
Verify R and C terminals are supplied with 19-28VAC.
Verify Y terminal is connected to 24VAC at contactor coil.
Verify voltage at contactor coil falls below 0.5VAC when
off.
Check that compressor T1 and T3 wires are through
module's current sensing holes. Verify Y terminal is
connected to 24VAC at contactor coil. Verify voltage at
contactor coil falls below 0.5VAC when off.
Determine if module's Y terminal is connected. Verify Y
terminal is connected to 24VAC at contactor coil. Verify
24VAC is present across Y and C when thermostat
demand signal is present. If not, R and C are reverse
wired. Verify voltage at contactor coil falls below 0.5VAC
when off. ReviewThermostat Demand Wiring (page 4) for
Y and C wiring.
Table 1
11
