TM049 27L Continuous Flow Service Instructions
REV AL
– Issued April 2019
This document is stored and maintained electronically by Rheem Technical Support.
All printed copies are deemed “uncontrolled”.
49
Fault Finding Tests 10 & 12 - 14
Tests 10 and 12
Test 10:
Conduct test with water flowing.
Using a multimeter set on the DC volts scale,
measure the voltage between 1 Red and 2 Black
at terminal P whilst plugged into PCB.
Normal voltage is between DC1.5 and 14.0V.
Test 12
:
Using a multimeter set on the ohms scale, measure
the resistance between 1 Red and 2 Black at
terminal P whilst unplugged from the PCB.
Normal resistance is between 40 ohms and 80
ohms.
Test 13
Test 14
Conduct test with flame present.
Using a multimeter set on the AC volts scale,
measure the voltage between W1 at terminal U
and earth.
Normal voltage should be 1 - 100VAC.
Unplug multi-pin connector from terminal T on
control PCB and using a multimeter set on the
kilo-ohms scale, measure the resistance of the
Over Heat Limiter assembly.
Normal resistance should be between 50 - 500
kilo-ohms.
K
BK R
Y
BR
G W
1 2 3 4 5 6
8
7
R
BK
BK
R
BL
4
2
7
6
5
Y
W
1
2
3
4
BL
O
W
BR
R
BK
4
3
2
1
8
7
6
5
N
O
9
Y
G
5
6
1
2
3
4
SW1
SW2
P
V
3
2
1
T 1
2
S
3
2
1
1
U
1
1
1
2
3
S
2
1
T
1
U
1
2
3
V
