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comfort alert trouBleShooting - continued
Status led Status led description
ALERT
Open Start Circuit
Flash Code 6
Current only in run
(Yellow LED)
circuit
ALERT
Open run circuit
Flash Code 7
Current only in start
(Yellow LED)
circuit
ALERT
Welded Contactor
Flash Code 8
Compressor always runs
(Yellow LED)
ALERT
Low Voltage
Flash Code 9
Control circuit < 17VAC
(Yellow LED)
* Flash code number corresponds to a number of LED flashes, followed by a pause and then repeated. Trip and alert LED's
flashing at same time means control circuit voltage is too low for operation.
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 & ALERT LED flashing together
ALERT Flash CODE 3 displayed incorrectly
(Compressor short cycling)
ALERT Flash Code 5, 6, or 7 displayed incorrectly
(Open Circuit, Open Start Circuit or Open Run Circuit)
ALERT Flash Code 6 (Open Start Circuit) displayed for
Code 7 (Open Run Circuit) or vice-versa
ALERT Flash Code 8 displayed incorrectly (Welded
Contactor)
Status led troubleshooting information
• Run capacitor has failed
• Open circuit in compressor start wiring or connections
— Check wiring and connectors between supply and the compressor S
terminal
• Compressor start winding is damaged
— Check compressor motor winding resistance
• Open circuit in compressor run wiring or connections
— Check wiring and connectors between supply and the compressor r
terminal
• Compressor run winding is damaged
— Check compressor motor winding resistance
• Compressor contactor has failed closed
• Thermostat demand signal not connected to module
• Control circuit transformer is overloaded
• Low line voltage (contact utility if voltage at disconnect is low)
• Check wiring connections
table 3. led diagnostics - continued
• Determine if both r & c module terminals are connected.
• Verify voltage is present at module's r & c terminals.
• Determine if r & y terminals are wired in reverse.
• Verify modules R & C terminals have a constant source.
• Verify y terminal is connected to 24VAC at contactor coil.
• Verify voltage at contactor coil falls below 0.5VAC when off.
• Verify 24VAC is present across y & c when thermostat demand signal is
preset. If not, r & c are reversed wired.
• Verify r & 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.
• Verify the compressor run and start wires are routed through the module's
current sensing holes.
• Verify the y terminal is connected to 24VAC at contactor coil.
• Verify voltage at contactor coil falls below 0.5VAC when off.
• Verify the compressor run and start wires are routed through the correct
module sensing holes.
• Determine if module's y terminal is connected.
• Verify y terminal is connected to 24VAC at contactor coil.
• Verify 24VAC is present across y & c when thermostat demand signal is
present. If not, r & c are reversed wired.
• Verify voltage at contactor coil falls below 0.5VAC when off.
• Review Thermostat Demand Wiring (page 10) for y & c wiring.
table 4. module Wiring troubleshooting
recommended troubleshooting action
19
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