is

 

 

 

 

 

Code + Description

Cause

Solution

Remark

 

 

 

 

 

 

 

F03 (lock out error)

Damaged wiring/Open

1.

Check the wiring between the pressure switch and the

If the error cannot be resolved or is persistent, contact your

 

The pressure switch

circuit

 

controller

installation engineer

 

 

2.

If necessary, replace the wiring

To replace the necessary parts, you must contact your installation

 

fails to work correctly

 

engineer

 

 

 

 

 

 

Pressure switch not

1.

Check the running speed of the fan (12.5 "Display the selected

 

 

 

closing

 

appliance")

 

 

 

 

2.

Check that the hoses on the pressure switch and the air supply

 

 

 

 

 

hose between fan and burner are correctly fitted. Refit them if

 

 

 

 

 

necessary

 

 

 

 

3.

Check for cracks in the hoses on the pressure switch and in the

 

 

 

 

 

air supply hose between fan and burner. If necessary, replace

 

 

 

 

 

the hoses.

 

 

 

 

4.

Check that the flue gas outlet is compliant (3.9 "Air supply and

 

 

 

 

 

flue").

 

 

 

 

5.

Check for blockage in the flue gas discharge. Remove any

 

 

 

 

 

blockage that may be present

 

 

 

 

6.

Check for blockage in the condensation water discharge.

 

 

 

 

 

Remove any blockage that may be present.

 

 

 

 

7.

Measure the pressure differential across the pressure switch.

 

 

 

 

 

See the table in Preparation for

 

 

 

 

 

maintenance (15.2 "Preparation for maintenance"). If there is

 

 

 

 

 

insufficient pressure differential, clean the heat exchanger. If the

 

 

 

 

 

pressure differential is acceptable, check that the pressure

 

 

 

 

 

switch is closing, using a multimeter.

 

 

 

 

 

 

 

 

Instruction manual BFC

76

Page 76
Image 76
A.O. Smith BFC - 60, BFC - 30 service manual Code + Description Cause Solution Remark F03 lock out error, Appliance, Flue

BFC - 30, BFC - 60 specifications

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