Rheem 862 27 Series Service Instructions Manual page 36

Hot water tap closed
Water flow sensor off
G.I.S.V (SVO) off
or
[S.V. 1-3 (SV1-3) off]
P.G.F.R Valve at
minimum
Fan motor at minimum
I.U.I off
YES
Flame current
detected less than
4
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
5
check ok?
NO
YES
Fan off
Approx. 6 minutes later
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".
Operational Flow Chart 3
Post Purge Shut Down Function
NO
8 seconds later
NO
Abnormal combustion
99 Flashing
Fan off
Isolate power
Locate and repair fault.
Clear error code 99.
S.V. 1-3 (SV1-3)
G.I.S.V (SV0) failure
failure
80 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
Locate and repair fault
and restore power
10 seconds later
51 Flashing
Fan off
10 seconds later
Isolate power
36