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OPERATION & SERVICE
Servicing should only be performed by a Qualified Service Agent
28
Element Sensor Operation
When current (amperage) flows through a wire in an electrical circuit a magnetic field is
developed that radiates out from the wire. The individual current sensors detect this
magnetic field. When current flows in a wire routed through the hole in one of the individual
current sensors, the sensor is activated and sends a signal back to the CCB confirming the
presence of current.
The current sensors require approximately 3 AC amps minimum to activate. An active signal
from a current sensor only indicates current has been sensed, it DOES NOT indicate the
amount or level of current is correct for a given heating element.
As explained on the previous page Element Sensors contain three individual current
sensors. The three sensors are installed just above the power circuit fuse blocks. One
heating element power wire is routed through a hole in one sensor.
The plug from each Element Sensor plugs into one of three sockets on the CCB. The J12,
J13 and J14 sockets are for heating element Banks 1, 2 and 3 respectively. See the images
below.
Service Note: The Element Sensors cannot be serviced in the field. If it is determined one
of the three individual current sensors in an Element Sensor is defective the entire Element
Sensor assembly must be replaced. If current through a heating element has been verified
with an AC amp meter (see page 23) and the current sensor for that element does not
activate and send a signal to the CCB:
• Ensure the Element Sensor plug and socket connection is making good contact.
• On models equipped with 2 or 3 Banks of heating elements secure power to the water heater and try
switching Element Sensor plugs between the J12, J13 and J14 sockets to verify the Element Sensor
is defective - a “No Current Detected” Alert message and Status Icon indication should “follow” the
defective Element Sensor and report a different heating element is not drawing current when current
is expected.
J12 Heating Element Bank 1
J13 Heating Element Bank 2
J14 Heating Element Bank 3
CCB Element Sensor Sockets Heating Element Wire Routing