17
6. NO WATER
No Water
0 days 0 hrs 0 mins ago
Error Code: D6-8
No water detected by Powered
Anode.
The control indicates a problem
with the anode protection. By
ADVANCED
BACKACCEPT
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.
CHECK/ REPAIR:
POWERED ANODES
The water heaters covered by this Service Handbook are equipped with powered anodes. There are three top-mounted anodes and
two side-mounted anodes. See Figure 11. 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.
Side-Mounted
Power Anodes (2)
Top-Mounted
Power Anodes (3)
Figure 11. Powered Anode Connections
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.
Cleaning Method:
If corrosion is present on the air side of the anode, use a wire brush to clean the outer nut and brass wire terminal tab. To clean the
inner nut, remove the outer nut and the brass wire terminal tab. DO NOT REMOVE inner nut. Clean with wire brush. Reassemble and
connect blue wire to brass terminal tab.
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