Specifications

TM040 16, 18 & 20L Continuous Flow Gas Water Heater Service Instructions
D.O.I: 2/06/2009
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31
Fault Finding Tests 1 – 3
Components will be “Live” when conducting tests, exercise caution.
Test 1
Power Filter
Using a multimeter set on the AC volts scale, measure the voltage at the connector plug to the
transformer primary winding.
Normal voltage is between 230V and 250V.
Test 2
Test 3
OMRON G5NB-1A4
12VDC JAPAN 12VDC JAPAN
G5NB-1A4 OMRON OMRON G5NB-1A4
12VDC JAPAN
H
I
D
C
Using a multimeter set on the AC volts scale,
measure the voltage between red wires at
terminals H & I on the PCB.
Normal voltage is between 90V and 110V.
Using a multimeter set on the DC volts scale,
measure the voltage between terminals C &
D on the PCB.
Normal voltage is 12V.