How To Fault Find - Rheem 871018 Service Instructions Manual

How to Fault Find

When conducting fault finding techniques it is important to understand that the same error
code with a different sequence number can be displayed at different points during the
operational sequence of the water heater. It is important to determine where the fault
occurred in relationship to the operational sequence of the water heater before
commencing fault finding tests, as the tests may differ even though the same error code
can be displayed.
If a fault occurs the LED display will alternate between the error code for the fault and a
sequence number that indicates where in the operational sequence of the water heater the
fault occurred. The operational flow charts are broken into 5 sections designated by boxed
numbers. The sequence number table on page 24 converts the sequence number
displayed on the LED to the appropriate operational flow chart section (shown directly
below where the Sequence Number falls).
The flow diagram below outlines the recommended procedure to successfully diagnose,
test and rectify faults on the Integrity range of water heaters.
2
Convert the sequence number
to an operational flow chart
section number using the
sequence number table
5
Knowing where the fault
occurred, use the fault
diagnosis sequence chart
on Page 33 to locate the
correct fault finding flow
chart to use.
Identify sequence number and error
code displayed on LED.
Locate the operational
flow chart section
identified in step 2
Follow the fault finding
flow chart identified in
step 5 until the error
code displayed on the
Integrity LED is located.
Additional information on components, performance and past
history can be gained from the maintenance information
stored in the PCB.
1
3
6
8
23
4
Locate the error code within
the operational flow chart
section identified in step 2 and
take note of where the fault
occurred during the
operational sequence.
7
Conduct the necessary tests
outlined to identify and rectify
the fault.