American Water Heater Residential Gas Water Heaters Benutzerhandbuch

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Only qualified service technician, as defined in Qualifications using 

appropriate test equipment, should perform any service procedures 

on the water heater.

 

NOTE: If you are not qualified and licensed or certified as required 

by the authority having jurisdiction to perform a given task do not 

attempt  to  perform  any  of  the  diagnostic  or  service  procedures 

described in the following section.

If you do not understand the instructions in the following section do 

not attempt to perform any procedures.

Call the technical support phone number listed on the back cover of 

this manual for further technical assistance or to locate a qualified 

service technician in your area.

When the control system declares a Fault condition it will display a 

Fault message on the control system's LCD with an exclamation "!" 

mark. The control system will lock out and disable heating operation 

until the condition is corrected. The water heater must be serviced 

by a qualified service technician before operation can be restored.

When the control system declares an Alert condition it will display 

an Alert message on the control system's LCD with a question "?" 

mark.  The  water  heater  will  continue  to  operate  during  an  Alert 

condition  but  the  water  heater  must  be  serviced  by  a  qualified 

service technician as soon as possible.

To reset the control system from a lock out condition; turn off the 

switch in front of the unit for approximately 20 seconds and then 

back on. Keep in mind: if the condition that caused the Fault has 

not been corrected, the control system will continue to lock out.

Turn off power to the water heater

before performing any service.

Label all wires prior to disconnecting

when performing service. Wiring errors

can cause improper and dangerous

operation.

Verify proper operation after servicing.

Failure to follow these instructions can

result in personal injury or death.

The following section, Fault And Alert Messages lists some of the 

messages the control system will display on the LCD when there 

are  operational  problems. This  is  not  a  complete  list. Along  with 

each of the Fault and Alert messages described there will be a list 

of possible causes and things to check and repair.