A.O. Smith DSE-5, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Agent
33
OPERATION & SERVICE
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 the minimum current has been sensed, it DOES NOT
indicate the amount or level of current is correct for a given heating element/loop.
As explained on the previous page Element Sensors are an assembly that contain three
individual current sensors. The three current sensors are installed so that one wire from
each loop of each element passes through the hole in a sensor.
The plug from each Element Sensor assembly plugs into one of five sockets on the CCB.
The J12, J13, J14, J15 and J16 sockets are for heating elements 1 - 5 respectively
depending on how many elements are installed in the water heater. 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 assembly is defective the entire
assembly must be replaced. If the correct amperage through a heating element/loop has
been verified with an AC amp meter (see page 25) 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 more than one heating element secure power to the water heater and try
switching Element Sensor plugs between the J12, J13, J14, J15 and J16 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/loop is not
drawing current when current is expected.
J12 Heating Element 1
CCB Element Sensor Sockets Element Sensor & Element Wire Routing
J13 Heating Element 2
J14 Heating Element 3
J15 Heating Element 4
J16 Heating Element 5
To J12 - J16 Sockets To J12 - J16 Sockets
Individual
Current
Sensors