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”
34
Fault Finding Chart 1
Voltages up to 240 volts will be present within the water heater, take care
not to touch wiring terminals. Use an insulated tool when operating the DIP
switch or MIN and MAX buttons.
Power Supply
Is 240
volts AC Present at
the power
point?
NO
No power supply. Check
household wiring.
YES
Test 1
Cordset open circuit? - replace.
Inline fuses open circuit
– replace.
Internal wiring from terminal block
or transformer open circuit
–
repair.
NO
YES
Test 2
Transformer failed
– replace.
NO
Test 3
Power filter open circuit
– replace.
NO
Test 4
YES
Error code
Displayed?
Remote controller failed
–
replace.
Remote controller cable open
circuit
– replace.
YES
PCB failed
– replace.
NO
1
Is
240 volts
AC Present at the
transformers primary
winding?
Is
The transformers
output voltage 90 - 110
volts AC?
Is
90 - 110 volts AC
Present at the
PCB?
Turn DIP
switch 1 on.