TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B
D.O.I: February 2008
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Fault Finding Tests 9 – 13
Isolate power when conducting resistance tests. “Live” components present
during voltage tests, exercise caution
Tests 9 and 10 – Diagnostic Point 4
Diagnostic Point 4
Conduct test with water flowing
Isolate power before removing
connector plugs
Unplug connector J from the PCB and select
maintenance information 0y on the L.E.D
display.
If 01-07 is displayed the PCB has failed. If 00
is displayed there may be current leakage to
earth
DC4 –10V
(or measurement by
pulse counter of not
less than 4800
pulses per minute)
Test 12 - Diagnostic Point 9
Test 13 - Diagnostic Point 12
Conduct test with no water flow
Measure the voltage between terminals 1, 2
and 3 on connector J and earth. Voltage should
be between AC2 – 20V
Conduct test with water flowing
When ignition sequence commences, normal
voltage should be between AC 85 - 110V
until flame is detected.
(Note: Duration is approximately 3 seconds)
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