Operating Instructions
Part No. 70476501ENR7
71
P Models
Figure 39
L Models
Figure 40
Ignition Control Operation and
Troubleshooting for Models Starting
3/11/13
WARNING
70458601 and 70458701 controls cannot be serviced
by the user. If any control failures are detected,
the controls must be replaced by qualified service
personnel. Risk of explosion or fire can result if
the control module has been opened or with any
attempts to repair it and the warranty is void.
W818
Before troubleshooting the system, check the following items:
- Verify all mechanical and electrical connections are secure and
tight.
- Verify all system wiring is correct.
- Verify there is a proper system ground. The igniter, flame
sensor and igniter module must share a common ground with the
burner. Nuisance shutdowns are often caused by a poor or erratic
ground.
- Verify that the system is powered and that the control is calling
for heat.
- If the control proceeds to an error code on the red diagnostic
LED, troubleshoot per the Fault conditions table below:
Fault Conditions
LED Indication
Fault Mode
Off
Normal Operation
1 Flash
At Power Up
Summary of Contents for LDR-900-S
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