Troubleshooting; Introduction - A.O. Smith BFM - 100 Installation & Service Manual

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11.1 Introduction

Instruction manual BFM

Troubleshooting

This chapter deals with the following problems with the appliance:
• Gas smell.
• Water leakage.
• Explosive ignition.
• Poor flame profile.
• No hot water.
• Insufficient hot water.
When the appliance is in an error condition, the heat demand is (temporarily)
ignored, and you cannot draw hot water. The frost protection is also out of
action. The error conditions are divided into three groups:
• Lock out errors of the burner control
In this event, the red error light will be lit on the control panel. The burner
control is in lockout.
Once the cause has been rectified, the reset button must be pressed to
restart the appliance.
• Cycling of appliance
In this case, the appliance continuously attempts to start, but there is an
error that prevents the heating cycle
from completing successfully. Once the cause has been rectified, the
appliance will restart automatically.
• Blocking errors
You can recognize this condition when the appliance does not start running,
despite the fact that the water is colder than the temperature set with the
control thermostat (7.5 "Control
These errors disappear automatically once the cause of the error has been
removed, after which the appliance resumes operation by itself.
Possible error conditions are explained in the following troubleshooting tables.
Note
Footnotes referred to in the tables can be found on the last page of each
table.
(9.3 "The appliance's heating cycle")
thermostat").
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