Troubleshooting; Introduction; Error Conditions - A.O. Smith ADM - 40 Installation, User And Service Manual

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Instruction manual ADM

Troubleshooting

11.1 Introduction

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.

11.2 Error conditions

If the water heater goes into an "error" condition, you will be unable to draw hot
water. The frost protection will also be out of operation. These error conditions
are divided into three groups:
• Lockout error from the flue gas thermostat
The safety (pushbutton) on the flue gas thermostat in the draught diverter
has been activated. After removing the cause, the pushbutton (7.6 "Burner
control reset button") must be pressed to restart the appliance.
• Lockout error from the flue gas thermostat
When this happens, the red LED on the control panel will be illuminated. The
burner control is locked out.
After eliminating the cause, the appliance must be returned to service by
pressing the reset button (7.6 "Burner control reset button").
• Blocking errors
You can recognise this condition from the fact that the appliance does not
start running even though the water temperature is lower than the setting
that you have defined using the control thermostat (7.5 "Control
thermostat").
These errors disappear automatically once the cause of the error has been
removed, after which the appliance resumes operation by itself.
The following pages provide troubleshooting tables for each type of error.
Note
Footnotes referred to from within any table are shown at the bottom of the
last page of that table.
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