Burnham residential boilers troubleshooting

Burnham ALP105 boilers troubleshooting

CODE	CONDITION	POSSIBLE CAUSES
b 08	Pressure switch circuit open	• Blockage in intake or vent system.
		• Vent and/or intake system not constructed in accordance with Part VI
		• Blocked or leaking pressure switch tubing
		• Heat exchanger or burner blockage
		• Terminals exposed to high winds
		• Blockage in condensate trap above vent.
b 18	MCBA supply sensor detected temperatures in excess of200°F	• Heating load at time of error was far below the minimum firing rate c boiler
		• Defective primary pump or no flow in primary loop (Piping Method
		• Control system miswired so that boiler operation is permitted when n are calling
b 19	MCBA return sensor detected temperatures in excess of200°F	• See possible causes for “bl8”
		• Flow through boiler reversed
		• Sensor wiring reversed
b 24	MCBA is reading a return sensor temperature higher than the supply sensor temperature. Condition must be present for at least 75s for this error code to appear.	• Flow through boiler reversed. Verify correct piping and pump orienta
		• No boiler water flow. Verify that system is purged of air and that appi valves are open.
		• Sensor wiring reversed.
		• Supply or return sensor defective.
b25	Supply water temperature has risen too quickly	• See possible causes for “bl8”
		• Inadequate boiler water flow. Verify' that pump is operating and that pump and piping are sized per Part VIII of this manual
b26	Boiler safety limit, or external limit wired across terminals 3&4, is open.	• See possible causes for “bl8”
		• Defective supply sensor.
b 30	Temperature rise between supply and return is too high.	• Inadequate boiler water flow. Verify' that pump is operating and that pump and piping are sized per Part VIII of this manual
b 61	Pressure switch circuit closed with fan off	• Blockage in pressure switch hose
		• Pressure switch wires shorted together
		• Defective pressure switch
		• Loose or miswired fan speed harness (if “b61” error code is observed while fan is running)
b65	Fan is not achieving set point speed	• Loose or incorrect fan speed control connection
		• Defective fan
E 00	A flame signal was present when there should be no flame.	• Defective gas valve make sure inlet pressure is below maximum on rating plate before replacing valve.
E 02	Flame failure after 5 tries to restart	• No gas pressure
		• Gas pressure under minimum value shown on rating plate
		• Gas line not completely purged of air
		• Defective Electrode
		• Loose burner ground connection
		• Defective Ignition Cable
		• Defective gas valve (check for 24 VDC at harness during trial for ignition before replacing valve)
		• Air-fuel mixture out of adjustment consult factory
E 03	Gas valve error	• Loose or defective gas valve harness. Check electrical connections.
		• Defective gas valve (check for 24 VDC at harness during trial for ignition before replacing valve)
E 04	Power failure occurred after lockout	• Some other error on this list occurred and power to the boiler was then interrupted. Reset control and see if hard lockout reoccurs.
E 05, E 06, E 07, E 11	Internal control failure	• Reset the control. If problem reoccurs, replace the MCBA.
E 12	Low water cut-off circuit open	• If yellow light on LWCO is on, system is low on water
		• If neither yellow nor green light is on, check LWCO harness and check for 24VAC across AT140 transformer
E 13, E 14, E 15, E 16, E 17	Internal control failure	• Reset the control. If problem reoccurs, replace the MCBA.
E 18	MCBA supply sensor detected temperatures in excess of 200°F for an extended period of time	• See possible causes for “b18" error. Also, check safety limit for proper operation.
E 19	MCBA return sensor detected temperatures in excess of 200°F for an extended period of time	• See possible causes for “b19“ error.
E 28	Blower is not running when it should or fan speed signal not being detected by MCBA	• Loose connection in 120 VAC fan wiring
		• Loose or miswired fan speed harness
		• Defective fan
E 29	Blower fan speed has not returned to zero rpm	• Miswired fan speed harness
		• Defective fan
E 31	Shorted supply temperature sensor	• Shorted or miswired supply sensor wiring
		• Defective supply sensor
E 32	Shorted return temperature sensor	• Shorted or miswired return sensor wiring
		• Defective return sensor
E 35	Flue gas temperature sensor short circuit	• Shorted or miswired flue temp sensor wiring
		• Defective flue temp sensor
E 36	Supply water temperature sensor circuit open	• Loose or miswired supply sensor wiring
		• Defective supply sensor
E 37	Return water temperature sensor circuit open	• Loose or miswired return sensor wiring
		• Defective return sensor
E 40	Flue gas temperature sensor circuit open	• Loose or miswired flue temp sensor wiring
		• Defective flue temp sensor
E 44	Internal control failure	• Reset the control. If problem reoccurs, replace the MCBA.
E 52	Flue gas temperature over 230°F	• Heat exchanger needs to be cleaned
		• Boiler over-fired
		• Air-fuel mixture out of adjustment consult factory
E 60	Internal control failure	• Reset the control. If problem reoccurs, replace the MCBA.

Burnham ALPINE boilers troubleshooting

Condition	Possible Cause
Display Blank, Fan off, LWCO lights off, no green power light on Sage2.1 Controller	No 120VAC Power at boiler. Check breaker and wiring between breaker panel and boiler.
Display Panel Blank, Fan running	Loose 120VAC connection wiring between boiler J-Box and transformer Loose 24 Vac connection wiring between transformer and Sage2.1 Loose 5 Vdc connection wiring between display and Sage2.1
Boiler fires, but display panel is blank	Loose 5 Vdc connection wiring between display and Sage2.1 Defective display
Boiler not responding to call for heat, Status screen reads “Central Heat T-Stat Off’	Boiler is not seeing call for heat. Check thermostat or zone wiring for loose connection, miswiring, or defective thermostat/zone control.
Boiler not responding to a call for heat, “Standby” status is showing.	Boiler is not firing. There is no call for heat or there is a call for heat and the temperature is greater than setpoint.
Boiler not responding to Domestic Hot Water Heat Request	Boiler is not sensing Domestic Hot Water Heat Request. Check wiring for loose connection, miswiring, or defective indirect water heater aquastat.
Boiler Running but System or Boiler Circulator is not running	Check wiring for loose connection, miswiring. When there is a Domestic Hot Water Heat Request the System or Boiler pumps will be forced “off’ when there “Run Pump for” parameter is set to “Central heat, off DHW demand” or “Central Heat, Optional Priority”. This has been set to allow all of the heat to be provided for fast indirect water heater recovery. After one hour of “priority protection” or the end of the Domestic Hot Water Heat Request the system and boiler pumps will be free to run.
Home is cold during mild weather days	Increase Low Boiler Water Temperature parameter 5°F per day.
Home is cold during cold weather days	Increase High Boiler Water Temperature parameter 5°F per day