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Table 7: Ignition Module Terminal Cross-Reference
Ignition Module
Terminal Designation
Wiring Ladder Diagram
Terminal Number
MV 1
MV/PV 2
PV 3
GND 4
24V (GND) 5
24V 6
SPARK 9
Figure 52: LED Locations
Yellow LED
Flash Code
a
Indicates
Recommended
Service Action
Heartbeat Normal Flame Signal N/A
2
Weak Flame Signal -
System will operate reliably but ame signal is
less than desired.
Note: This indication may ash temporarily
during or shortly after lightoff on some
applications.
Perform routine
maintenance to
assure optimum
ame signal.
1
Marginal Flame Signal (less than 1.1 µA) -
System may not operate reliably over time.
Service call recommended.
Note: This indication may ash temporarily
during or shortly after lightoff on some
applications.
Check gas supply,
pilot burner, ame
sense wiring,
contamination of
ame rod, burner
ground connection.
OFF
No Flame or Flame Signal -
below minimum threshold for system operation.
N/A
a
Flash Code Descriptions
- Heartbeat: Constant ½ second bright, ½ second dim cycles.
- The ash code number signies that the LED ashes X times at 2Hz, remains
off for two seconds, and then repeats sequence.
TABLE 8: Yellow LED Flame Codes