Specifications

TM002 Integrity 18 & 20L Service Instructions REV: E
D.O.I: 7/11/2007
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38
Fault Finding Tests 14 – 22
Isolate power when conducting resistance tests. “Live” components present
during voltage tests, exercise caution.
Tests 14, 15, 18 and 19
NOTE:
Measure the voltage with connector L
plugged into PCB
Measure the resistance with connector L
unplugged from the PCB
Test
Solenoid
Valve
Normal
Voltage
Test Point
Diagnostic
Point
Test
Solenoid
Valve
Normal
Resistance
Test Point
Diagnostic
Point
14
GISV
9 Yellow
10 Black
11
15
GISV
9 Yellow
10 Black
11
1
3 Red
10 Black
13 1
3 Red
10 Black
13
18
2
DC70 to
DC100V
4 White
10 Black
14
19
2
0.8kilo-ohms
to
2.2kilo-ohms
4 White
10 Black
14
Tests 16 and 17 - Diagnostic Point 10 Test 22 – Diagnostic Points 6 and 7
Error
Code
Maintenance
display code
Diagnostic
Point
Test Point
Measured
Value
32
4y:
Combustion
Chamber
Thermistor
6
5 White
7 Black
Test 16 – Conduct test with water flowing
Measure the voltage with connector B
plugged into PCB. Normal voltage is
between DC1.5 and 8.0V.
Test 17 – Isolate power before conducting
test.
Measure the resistance with connector B
unplugged from the PCB. Normal resistance
is between 42 ohms and 97 ohms.
33
5y: Hot
Water Outlet
Thermistor
7
4 Red
7 Black
@20ºC –
10.3 kilo-
ohms
@40ºC –
4.9 kilo-
ohms