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Sequence of Operation
8:1 Staged Control,
continued
• N.O.contactoncoolrelay(RC)isenergizedand
closed
• Powerpassestoevaporativecoolingpump(P1)
*If DX or chilled water coils are used rather than an
evaporative cooler, the cooling sequence of operation
will depend on the coil controls. Cooling coil controls are
supplied by others.
This controller is found only in the furnace control
center. It has an LED indicator light on the top right
of the controller that
will flash GREEN for
NORMAL operation or
RED for an ERROR. Some
furnace configurations
have two of these
controllers.
The following are the green LED codes of operation:
The following are the red LED codes of error:
Operation and Errors -
Ignition Controller
GREEN LED Indications - NORMAL OPERATION
Flash Code Flash Code Indication
Steady on Flame detected, main burner on
0.1 second on/off Controller is sparking
0.5 second on/off Purge or inter-purge time
0.5 second on/4.5 second off Retry or recycle time
NOTE
The green LED light indicates NORMAL operation
while the red LED light indicates an ERROR
operation.
RED LED Indications - ERROR OPERATION
Flash Code Flash Code Indication
Blinks 1 time No flame in trial time error
Blinks 2 times Flame sense circuit error
Blinks 3 times Valve circuit error
Blinks 4 times Flame loss error
Blinks 6 times Airflow error
Blinks 7 times Ground or internal error
Steady on Line voltage/frequency error
®
Model IG / IGX Make-Up Air