Service Manual

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Troubleshooting
Error Codes and Error History Display:
If there is an operating problem with the water heater, an error code number will appear on the water heater
display with “Service Needed” to the right of the “Status” indicator. The error code label is located under the
water heater display and the following section in this service manual explains the error codes with corrective
actions to repair the water heater.
Error Code History:
In “Service Mode” pressing the “Select” button after the “Software Version” (item 8 as previously described
sequence of service modes) will show an error code history, if there have been any previous operating
problems with the water heater. If the display shows “--“, there is not a current error code. Note: The water
heater display will provide up to 10 previous error codes. The oldest will be stored in code index #1, and the
most recent in code index #10.
To view previous error code:
Step 1. In “Service Mode” press the “Select” button until the next display after the “Software Version.” If there
are no current error codes, the display will show “--“.
Step 2. Press the “Temperature Down” button to select the error code index, starting with the most recent error
code “10”.
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