Burnham ES2 manual Troubleshooting, IQ Boiler Control Error Codes when Err is flashing

Troubleshooting (continued)

IQ Boiler Control Status Codes (when "Err" is not displayed) - continued

Display Status Boiler / Control Action(s)

20Damper Failed The damper end switch has not closed (damper end switch is open) at the beginning of

Open the heat cycle. An alarm message is sent but the control is not in lockout.

21	Damper Failed	The damper end switch has not opened (damper end switch is closed) at the
	Closed	beginning of the heat cycle. An alarm message is sent but the control is not in lockout.

If "Err" IS displayed on the IQ Boiler Control: "Err" flashes on the IQ Boiler control display followed by a number. Use the following table along with this error number to determine the problem and possible causes:

IQ Boiler Control Error Codes (when "Err" is flashing)

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.
Err	4	Flame Current Lower	Check pilot assembly.
		than Threshold
Err	6	Flame Sensed Out of	Flame sensed out of normal sequence (before opening gas valve or after closing gas
		Normal Sequence	valve).
Err	18	Electronics Failure	Replace Control .
Err	24	Flame Sensed During	Flame sensed during post-purge (after gas valve signaled closed).
		Post-Purge
Err	32	Temperature Sensor	Temperature sensor or interface failure (open or short connection, increased connection
		Failure	resistance, dual sensor mismatch) or control hardware failure.
Err	55	Damper Failed	Atmospheric Damper End Switch failed to close (end switch contacts stuck open).
		to Open
Err	56	Damper Failed to Close	Atmospheric Damper End Switch failed to open (end switch contacts stuck closed).
Err	57	Flame Rod Shorted to	Flame Rod shorted to burner ground, this can result from excessive flue gas
		Burner Ground	condensation.
Err	58	AC Line Frequency Error	AC Signal is too noisy or frequency is incorrect.
Err	59	Line Voltage Error	AC voltage out of specification high or low.
Err	60	Thermostat Input Higher	Check thermostat wiring.
		than Threshold
Err	61	Line Voltage Unstable	Possibly too many heavy loads switching on and off cause erratic supply voltage.
Err	63	Soft Lockout - Maximum	Maximum number of recycles exceeded.
		Recycles Exceeded
Err	64	Soft Lockout - Internal	Caused by general electronics failure such as relay open or shorted contacts, flame
		Failure	sensing circuit error, or A to D error.

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