Specifications

TM002 Integrity 18 & 20L Service Instructions REV: E

D.O.I: 7/11/2007

This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”

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 table on page 20 converts the sequence number displayed on the LED to

the appropriate operational flow chart section.

The flow diagram below outlines the recommended procedure to successfully diagnose,

test and rectify faults on the Integrity range of water heaters.

Identify sequence number and error

code displayed on LED.

Convert the sequence number

to an operational flow chart

section number using the

sequence number table

Locate the operational

flow chart section

identified in step 2

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.

Using the fault diagnosis flow

chart locate the correct fault

finding flow chart to use.

Follow the fault finding

flow chart identified in

step 5 until the error

code displayed on the

LED is located.

Conduct the necessary tests

outlined to identify and rectify

the fault.

Additional information on components, performance and past

history can be gained from the maintenance information

stored in the PCB.