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”.
45
Fault-Finding Tests 5 - 7
Test 5
Test 6
Conduct test with no water flow.
Using a multimeter set on the DC volts scale,
measure the voltage between 3 Red and 2 Black
at terminal S on the control PCB.
Normal voltage should be between DC11
– 17V.
Conduct test with water flowing.
Using a multimeter set on the DC volts scale,
measure the voltage between 1 Brown and 2
Black at terminal S on the control PCB.
Normal voltage should be between DC2
– 5V.
Test 7
Remove the flow sensor turbine. Refer to
‘Flow Sensor Turbine’ procedure on page 72.
Check for excessive wear of turbine or blockage by foreign material such as thread tape. The
power must be isolated during water flow sensor removal.
G5NB-1A
4
OMRON
G5NB-1A
4
OMRON
G5NB-1A
4
OMRON
OMRON
G5NB-1A
4
G5NB-1A
4
OMRON
4
3
2
1
R
1
2
3
S
2
1
T
1
U
1
2
3
V
V
3
2
1
U 1
T 1
2
S
3
2
1
R
1
2
3
4
OMR
ON
G5NB
-1A4
G5NB
-1A4
OMR
ON
OMR
ON
G5NB
-1A4
OMR
ON
G5NB
-1A4
OMR
ON
G5NB
-1A4
Control Assembly
Water Volume
PGFR
Flow Sensor Turbine
Lock ring
