Applicable Systems
Cleaver-Brooks Hawk 6000 Controller
Symptoms
The boiler reports insufficient combustion air. The combustion air supply is below the requirement.
Possible Causes
- Air intake or damper blocked
- Combustion air fan failure or degraded
- Burner air damper not opening fully
Troubleshooting Steps
- Step 1: Check the air intake for blockage
Intake is clear - Step 2: Verify the combustion air fan operation
Fan delivers adequate air flow - Step 3: Inspect the burner air damper operation
Damper opens to the correct position
How to Reset
To reset: Restore adequate combustion air, then clear the alarm.
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Source: Cleaver-Brooks Boiler Manual, Cleaver-Brooks Inc.
Category: Boiler
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