A.O. Smith ADM - 60 Installation Manual | Page 49

A.O. Smith Water Heater Installation Manual - ADM - 60.
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Instruction manual ADM

49

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8

Status of the 
appliance

8.1

Introduction

Topics covered in this chapter:

Operating modes;

Error conditions;

8.2

Operating modes

When running, the appliance has three basic 
operating modes, namely:

ELECTRICALLY ISOLATED
In this mode, the appliance is off and no 
components are live. The isolator (switch between 
the appliance and the mains power supply) is off. 
On the control panel:
-

the ON/OFF switch is at position 0;

-

the green light is dimmed.

OFF
In this mode, the frost protection is activated. The 
isolator is at position I. On the control panel:
-

the ON/OFF switch is at position 0;

-

the green light is lit.

ON
In this mode, the appliance continuously responds 
to the heat demand. On the control panel:
-

the ON/OFF switch is at position I;

-

the water temperature can be set using the 
rotary knob of the  control 
thermostat (7.5 "Control thermostat");

-

the green light is lit.

8.3

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 cause of the error cannot be seen on the control 
panel. For a detailed overview of error conditions, 
please refer to the error tables (11 "Troubleshooting").
If, as end-user, you find the appliance in an error 
condition, you may attempt to restart the appliance by 
pressing the reset button once. However, if the error 
returns or occurs several times in a short time, you 
must contact your service and maintenance engineer.

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