Sequence of Operation
8:1 Staged Control, continued
•N.O. contact on cool relay (RC) is energized and closed
•Power passes to evaporative cooling pump (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.
44Model IG / IGX
Operation and Errors -
Ignition Controller
NOTE
The green LED light indicates NORMAL operation while the red LED light indicates an ERROR operation.
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:
GREEN LED Indications - NORMAL OPERATION
Flash Code | Flash Code Indication |
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|
Steady on | Flame detected, main burner on |
|
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0.1 second on/off | Controller is sparking |
|
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0.5 second on/off | Purge or |
|
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0.5 second on/4.5 second off | Retry or recycle time |
|
|
The following are the red LED codes of error:
RED LED Indications - ERROR OPERATION
Flash Code | Flash Code Indication |
|
|
Blinks 1 time | No flame in trial time error |
|
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Blinks 2 times | Flame sense circuit error |
|
|
Blinks 3 times | Valve circuit error |
|
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Blinks 4 times | Flame loss error |
|
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Blinks 6 times | Airflow error |
|
|
Blinks 7 times | Ground or internal error |
|
|
Steady on | Line voltage/frequency error |
|
|
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