Rheem II Series Service Instructions Manual page 25

Hot tap closed
Water flow sensor off
G.I.S.V (SVO) off
[S.V. 1-3 (SV1-3) off]
P.G.F.R Valve at
minimum
Fan motor at
minimum
I.U.I. Off
Flame current
4
detected
< 0.1uA?
YES
G.I.S.V (SVO) off
[S.V. 1-3 (SV1-3) off]
P.G.F.R Valve off
Fan motor speed
checked during
operation?
YES
Fan motor
current check
OK?
NO
5
YES
Fan off
Note: see page 22 for details on interpreting chart abbreviations.
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"
Operation Flow Chart 3
Post Purge Shut Down Function
Check gas cut off function by
alternating the closing order of gas
valves SVO and SV1-3 at each shut
down
8 seconds la ter
NO
Check gas cut off function by
alternating the closing order of gas
valves SVO and SV1-3 at each shut
down
Abnormal combustion
NO
Decreased air flow
99 Flashing
Fan off
Isolate power
Locate and repair fault
Use procedure to
clear error code 99
S.V. 1-3 (SV1-3)
failure
80 Flashing
10 seconds la ter
10 seconds la ter
G.I.S.V (SV0) failure
51 Flashing
S.V. 1 (SV1) off
S.V. 2 (SV2) off
S.V. 3 (SV3) off
G.I.S.V (SV0) off
P.G.F.R valve off
Fan off
Isolate power
Locate and repair fault
and restore power
25