Troubleshooting
When a problem occurs with the boiler operation, the Burnham IQ Control System easily provides specific, valuable information to help resolve the issue quickly. The display on the IQ Boiler control should be the first place to check.
If "Err" IS NOT displayed on the IQ Boiler Control: Use the following table to determine the problem and possible causes.
IQ Boiler Control Status Codes (when "Err" is not displayed)
Display | Status | Boiler / Control Action(s) | |
Blank | Boiler and | No 120 Vac power at boiler, check breaker and wiring between breaker panel and boiler. | |
Circulator off | |||
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| Boiler not | Boiler is not seeing Heat Request. Check thermostat or zone wiring for loose connection, | |
1 | responding to | ||
miswiring, or defective thermostat or zone control. | |||
| Heat Request | ||
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| ||
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| Check wiring for loose connection, miswiring. When there is a Domestic Hot Water Heat Request | |
| Boiler Running | wired to the Outdoor Air Reset card the Circulator will be off for the duration of the priority time. | |
8 | but Circulator | This to allow all of the boiler output to be provided for fast Indirect Water Heater recovery. Check | |
| is not Running | Priority Time (pt_) function using Outdoor Air Reset IQ Option Card Adjustment Mode (see Reset | |
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| Card Adjustment Mode instructions). | |
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| The burner failed to light (no flame signal). | |
10 | Retry Delay | After a 5 minute delay, IQ Control will attempt to light the burner again. | |
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| There is no limit to the number of retries. |
The burner loses flame during running mode (
code "8").
10 | Recycle Delay | After a 10 second delay, IQ Control will attempt to light the burner again. | ||
If the burner loses flame during running mode ( | code "8") during the next six recycles, IQ | |||
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| Control will progress to a soft lockout. |
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When a soft lockout occurs, boiler will shut down.
Boiler automatically restarts once condition that caused the lockout is corrected and the
Boiler can be restarted sooner than the time delay by using Adjustment Mode function and manually resetting boiler (see Adjustment Mode instructions).
When a hard lockout occurs boiler shuts down.
14Hard Lockout Boiler will NOT automatically restart once the condition that caused the lockout is corrected. It will be necessary to go to Adjustment Mode function to manually reset the boiler (see
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| Adjustment Mode instructions). | |
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| Heat Request occurs and start of operating sequence is halted due to an open limit. | |
15 | Wait for Limit | Open limits may include Flame Roll Out Switch, Blocked Vent Switch, or Auxiliary. | |
to Close | Limit or Low Water Cutoff IQ Option Cards (when installed), refer to IQ Option Panel display for | ||
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| additional information. | |
16 | Flame Out of | Flame Signal is still present when expected to be 0 (no flame). | |
Sequence | |||
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18 | Waiting for | Heat Request occurs and the IQ control is waiting for the damper to open (end switch to close). | |
Damper to Open | |||
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The damper end switch is closed and the control waits for the damper end switch to open (*end
19Waiting for switch is open when damper is closed). This is checked at the beginning of a heat cycle before Damper to Close opening the damper. If the damper doesn't close in 60 seconds, the IQ Control goes to Status 21.
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