No Water; Powered Anodes; Power Anode Cleaning And Removal - A.O. Smith BTH 120 Service Handbook

8. NO WATER

No Water
Alert occurred 2 mins ago
No water detected by Powered
Anode.
Call a service professional:
Your Company Name Here
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CHANGE
CHECK/ REPAIR:

POWERED ANODES

The water heaters covered by this Service Handbook are equipped with powered anodes. BTH 120 models
only use 1 powered anode, all others will have two. These anodes do not need to be replaced unless
damaged. The CCB monitors the current through the anodes and will declare a fault if there is a disconnected
wire or if there is no water in the tank.

POWER ANODE CLEANING AND REMOVAL

1. Shut off gas, water and power supply going to the heater.
2. Relieve water pressure by either opening Temperature-pressure relief valve (T & P relief valve), if it is
piped to a drain, or drain some water off by connecting a hose to the drain valve.
26
Alert:
BACK ADVANCED
Powered Anode Connections
Servicing should only be performed by a Qualified Service Technician
CAUSES:
• The controller has not detected a voltage potential
of water in the tank.
• No water or low water in tank.
• Loose or open wiring connections to Power
Anode(s).
• Power Anode shorted to ground at wire connection.
See Powered Anodes section shown below.