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18
TROUBLESHOOTING
IQ Boiler Control Status Codes (when "Err" is not displayed)
Display Status Boiler / Control Action(s)
Blank
Boiler and
Circulator off
No 120 Vac power at boiler, check breaker and wiring between breaker panel and boiler.
1
Boiler not
responding to
Heat Request
Boiler is not seeing Heat Request. Check thermostat or zone wiring for loose connection,
miswiring, or defective thermostat or zone control.
8
Boiler Running
but Circulator
is not Running
Check wiring for loose connection, miswiring. When there is a Domestic Hot Water Heat Request
wired to the Outdoor Air Reset card the Circulator will be off for the duration of the priority time.
This to allow all of the boiler output to be provided for fast Indirect Water Heater recovery. Check
Priority Time (pt_) function using Outdoor Air Reset IQ Option Card Adjustment Mode (see Reset
Card Adjustment Mode instructions).
10
Retry Delay
The burner failed to light (no ame signal).
After a 5 minute delay, IQ Control will attempt to light the burner again.
There is no limit to the number of retries.
10
Recycle Delay
The burner loses ame during running mode (
code "8").
After a 10 second delay, IQ Control will attempt to light the burner again.
If the burner loses ame during running mode (
code "8") during the next six recycles, IQ
Control will progress to a soft lockout.
13
Soft Lockout
When a soft lockout occurs, boiler will shut down.
Boiler automatically restarts once condition that caused the lockout is corrected and the one-hour
time delay is completed.
Boiler can be restarted sooner than the time delay by using Adjustment Mode function and
manually resetting boiler (see Adjustment Mode instructions).
14
Hard Lockout
When a hard lockout occurs boiler shuts down.
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
Adjustment Mode instructions).
15
Wait for Limit
to Close
Heat Request occurs and start of operating sequence is halted due to an open limit.
Open limits may include Flame Roll Out Switch, Blocked Vent Switch, or Auxiliary.
Limit or Low Water Cutoff IQ Option Cards (when installed), refer to IQ Option Panel display for
additional information.
16
Flame Out of
Sequence
Flame Signal is still present when expected to be 0 (no ame).
18
Waiting for
Damper to Open
Heat Request occurs and the IQ control is waiting for the damper to open (end switch to close).
19
Waiting for
Damper to Close
The damper end switch is closed and the control waits for the damper end switch to open (*end
switch is open when damper is closed). This is checked at the beginning of a heat cycle before
opening the damper. If the damper doesn't close in 60 seconds, the IQ Control goes to Status 21.
When a problem occurs with the boiler operation, the Burnham IQ Control System easily provides specic,
valuable information to help resolve the issue quickly. The display on the IQ Boiler control should be the
rst place to check.
If "Err" IS NOT displayed on the IQ Boiler Control: Use the following table to determine the problem
and possible causes.