Service Conditions; Anode Warning; Q/T Sensor Warning; Collector Temperature Warning - A.O. Smith SGS-28 Installation, User And Service Manual

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0311753_SGS_28-120_II_UKUK_V2.0 , 2017-05-03

Service conditions

The figure shows the message SERVICE REQUIRED. If this message appears, the water
heater needs a service and maintenance inspection. In this case, contact your service and
maintenance engineer.
Note
Regular maintenance extends the service life of the water heater.
Note
The message SERVICE REQUIRED is based on the number of expired burning hours and
the preset service interval. If the service interval has been incorrectly selected, contact
the service and maintenance engineer for instructions on how to rectify this. Information
on the frequency of maintenance is provided elsewhere in the manual (see section 10).

Anode warning

This message appears when the anode protection is no longer active. If the message
appears, you must contact your service and maintenance engineer.
Note
The water heater continues to function when this message appears. If you ignore the
anode warning, the tank protection cannot be guaranteed. The warranty will be void.

Q/T Sensor warning

This message appears if the Q/T sensor has not been connected (properly) but has been
selected in the service program (see section 9.2.8.5). If the message appears, you must
contact your service and maintenance engineer.

Collector temperature warning

This message appears whenever the collector temperature is too high. This message
disappears automatically. If the message does not disappear, you must contact your
service and maintenance engineer.
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