Crown Boiler Troubleshooting: Understanding Error Codes and Common Problems
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C.Trouble shooting problems where a hard lockout code is displayed. When a hard lockout occurs, the boiler

will shut down and the display will flash the letter “E” followed by a two digit service code. Once the condition that caused the lockout is corrected, the boiler will need to be manually reset using the RESET button on the display.

Table 13.4: Hard Lockout Codes Displayed

CODE

CONDITION

POSSIBLE CAUSES

E 00

A flame signal was present when there should

• Defective gas valve - make sure inlet pressure is below maximum

be no flame.

on rating plate before replacing valve.

 

 

 

• 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

E 02

Flame failure after 5 tries to restart

• Defective Ignition Cable

• Loose or defective gas valve harness

 

 

 

 

• Defective gas valve (check for 24 VDC at harness during trial for

 

 

ignition before replacing valve)

 

 

• Air-fuel mixture out of adjustment - consult factory

 

 

• Blockage in vent system or heat exchanger (BWC 150 Only)

 

 

• Blocked condensate trap (BWC150 Only)

 

 

 

E 03

Internal control failure

• Reset the control. If problem reoccurs, replace the MCBA.

 

 

 

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

Internal control failure

• Reset the control. If problem reoccurs, replace the MCBA.

E 07

 

 

E 11

 

 

 

 

• If yellow light on LWCO is on, system is low on water

E 12

Low water cut-off circuit open

• If neither yellow nor green light is on, check LWCO harness and

 

 

check for 24VAC across AT140 transformer

E 13

 

 

E 14

 

 

E 15

Internal control failure

• Reset the control. If problem reoccurs, replace the MCBA.

E 16

 

 

E 17

 

 

E 18

MCBA supply sensor detected temperatures in

• See possible causes for “b18” error. Also, check safety limit for

excess of 200°F for an extended period of time

proper operation.

 

E 19

MCBA return sensor detected temperatures in

• See possible causes for “b19” error.

excess of 200°F for an extended period of time

 

Blower is not running when it should or fan

• Loose connection in 120 VAC fan wiring

E 28

• Loose or miswired fan speed harness

speed signal not being detected by MCBA

 

• 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.

 

 

 

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Contents BWC Series Page VII Product Description II SpecificationsIII Before Installing IV Locating the BoilerMinimum Clearance To Combustible Material Air for Ventilation Page VI Venting Vent System DesignHorizontal Direct Venting Vent Options 1,2 2a Summary of Horizontal Venting Options 3c Positioning Vent Terminal Under Overhangs Vertical Direct Vent System Vent Options 6 2b Summary of Vertical Venting Options VENT/ AIR Intake Fitting Equivalent Length Vent / Intake System Assembly Removing an Existing Boiler From a Common Chimney7a STAR-34 Connection to Vent Collar Z-VENT III Connection to Vent Collar SAF-T Vent Ezseal Connection to Vent Collar 10 Fasnseal Connection to Vent Collar 11 Condensate Piping Arrangement VII Gas Piping Gas Connection To BoilerGeneral System Piping Precautions Viii System PipingSystem Design Method 1 Primary/Secondary Piping Boiler in Secondary Loop Piping Method #1 Heat Only 4a Piping Method #1 Secondary Loop Piping Shaded Pipe and Circulator Sizing for Boiler Loop Fitting Equivalent Lengths Method 2 Primary/Secondary Piping Boiler in Primary Loop Piping Method #2 Heat Only 10a Piping Method #2 Secondary Loop Piping Bolded Page Flow GPM Piping for Special Situations 14 Chiller Piping IX Wiring Wiring Connections Diagram Ladder Diagram Page Start-up and Checkout For Your Safety Read Before Lighting BWC Series Lighting and Operating InstructionsBWC Burner Gas Valve Detail Typical CO2/O2 Combustion ReadingsPage Normal Display In Standby Mode XI OperationPage 170 Boiler Status First Digit Boiler StatusOutdoor Reset Curve XII. Service and Maintenance ContinuouslyPage XIII. Troubleshooting No Error Code DisplayedSoft Lockout Codes Displayed Code Condition Possible CausesHard Lockout Codes Displayed XIV Parts BWC Replacement Parts List TBD Page Page Page Page Ignition Electrode Gasket, 5mm 240011 Page BWC Replacement Parts List Page Page Page Page Page PN 980040 BWC 08/05

BWC Series specifications

The Crown Boiler BWC Series is a modern choice for heating needs, renowned for its efficiency and robust design. This series offers a range of residential and light commercial heating applicabilities, ensuring both comfort and reliability for users.

One of the standout features of the BWC Series is its efficiency. Crown Boilers utilize advanced technologies to maximize energy output while minimizing fuel consumption. With an AFUE (Annual Fuel Utilization Efficiency) rating often exceeding 90%, users can expect significant cost savings on their energy bills over time.

The BWC Series employs a high-quality, stainless steel heat exchanger, which not only enhances performance but also extends the lifespan of the boiler. This heat exchanger is designed to transfer heat efficiently, ensuring that the maximum amount of energy from the fuel is converted into usable heat. Additionally, the design helps to prevent corrosion and maintain system integrity over years of usage.

For technological advancements, the BWC Series incorporates a modulating gas valve which allows for precise control over the boiler's operation. This feature enables the system to adjust its output based on the heating demands of the home, resulting in improved energy efficiency and consistent comfort levels. Moreover, this modulating technology reduces the frequency of cycling, thereby prolonging the lifespan of the unit and minimizing wear and tear.

Another characteristic of the Crown Boiler BWC Series is its user-friendly interface. The boiler is equipped with a simple control panel that allows for easy monitoring and adjustment of settings. This accessibility is essential for users who want to manage their heating system without the need for extensive technical knowledge.

In terms of installation and maintenance, the BWC Series is designed with convenience in mind. Its compact footprint allows it to fit comfortably in a variety of spaces, making it an ideal choice for homes with limited installation areas. Additionally, Crown Boiler's commitment to high manufacturing standards ensures that the units require minimal maintenance, providing peace of mind to homeowners.

Overall, the Crown Boiler BWC Series is an excellent solution for those seeking efficient, reliable heating. Its combination of advanced technology, quality construction, and user-friendly design makes it an attractive option for any residential or light commercial application. Whether replacing an old system or installing a new one, the BWC Series delivers comfort and performance that can be depended upon.
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