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About the Operational Flow Charts
The Operational Flow Charts provide information on the start-up sequence and, in the event
a failure occurs at any point of the start-up sequence, what error code will be displayed.
When a fault occurs, an error code and sequence number will alternate in the LED display.
The Sequence Number Table below indicates the section of the operational sequence
(boxed numbers on the operational flow chart) where the fault occurred.
Circled numbers, adjacent to the component or function, indicate the diagnostic test point
required to diagnose the fault. Refer to the table on page 27.
By locating the Error Code (displayed on the water heater or remote controller) in the
diagnosis charts the component/s or fault can be quickly identified and tested using the
diagnostic procedures outlined in this manual.
Notes and Abbreviations used on the Operational Flow Charts
P.G.F.R Valve
G.I.S.V.
O.H.L
C.I
F.F
PCB
S.V. 1
S.V. 2
S.V. 3
I.U.I.
Sequence Number
Operational Flow Chart Section
TM090 12-26 Series II CFGWH Service Instructions
REV AB – Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed "uncontrolled"
Proportional Gas Flow Regulating Valve
Gas Inlet solenoid Valve
Over Heat Limiter
Combustion Indicator
Flame Failure
Printed Circuit Board
Solenoid Valve 1
Solenoid Valve 2
Solenoid Valve 3
In Use Indicator (Combustion indicator)
Sequence Number Table
- 0 to -9
1
A0 - A9
C0 - C9
F0 - F9
E0 – E9
P0 - P9
2
3
H0 - H9
L0 - L9
J0 - J9
U0 - U9
4
5
22
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