Rheem 874W27NF - Fault Finding Tests 8, 9 & 11

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TM061 Rheem 27 Water Star Service Instructions – Issued: 11/10
REV A Issued 08/13
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Fault Finding Tests 8, 9 & 11
Test 8
Conduct test during ignition attempt.
Using a multimeter set on the AC volts scale, measure the voltage between the two red wires at
base of the ignition module.
Normal voltage should be between 90 – 110VAC.
Test 9
Test 11
Conduct test with water flowing.
Using a multimeter set on the DC volts scale,
measure the voltage with multi-pin connector
plugged into terminal W on control PCB.
Using a multimeter set on the kilo-ohms scale,
measure the resistance with multi-pin
connector unplugged from terminal W on
control PCB.
Solenoid
Valve
Normal
Voltage
Test
Point
Diagnostic Point
Solenoid
Valve
Normal
Resistance
Test
Point
Diagnostic
Point
GISV
DC75 to DC100V
1 Yellow
8 Black
10
GISV
0.8 kilo-ohms
to
2.4 kilo-ohms
1 Yellow
8 Black
10
1
2 White
8 Black
12
1
2 White
8 Black
12
2
5 Red
8 Black
13
2
5 Red
8 Black
13
3
6 Blue
8 Black
18
3
6 Blue
8 Black
18
4321
Y
Z
5 4 3 12
LED1
LED
DISPLAY
PLM-110
A.C 100V
3A80505
JAPAN
N
JAPAN
JAPAN
2 3 4
765
W
6
4
5 2
1
3
X
JAPAN
JAPAN
6
4
5 2
1
3
X
JAPAN
5 6 7
432
JAPAN
JAPAN
W