Display Lights On Integrated Heater Control - A.O. Smith Master-Fit 100 Series Service Handbook

DISPLAY LIGHTS ON INTEGRATED HEATER CONTROL

LED
STATUS
Calling for heat
The ECO (Energy Cut-Out) has
opened.
No power
Tank is at a set temperature ± 2° F.
Tank has cooled below 120° F.
Preceded by "ECO Open" indication.
INDICATION
Servicing should only be performed by a Qualified Service Technician
ACTION
Normal status. No action required.
• Check for excessively hot water (203° F or
higher).
• Check the resistance of the temperature
probes and continuity of the high limit (ECO).
Check the breaker.
No action required.
• Push the manual reset button.
• Check the resistance of the temperature
probes and continuity of the high limit (ECO).
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