Rheem 874W27NF Service Manual page 29

Error Code 11 - Scenario 2
Is there voltage at GISV and
gas solenoid valves 1, 2 & 3?
TEST 9
YES
Is there voltage at the
proportional gas valve?
TEST 10
YES
Is the resistance of the
GISV and gas solenoid
valves 1, 2 & 3 correct?
TEST 11
YES
Is the resistance of the
proportional gas valve
correct?
TEST 12
YES
Check gas solenoid valves for
mechanical failure.
Replace if necessary.
Error Code 11 - Scenario 3
Display maintenance information
„0y‟ during an ignition attempt.
Does „0y‟ indicate 01 when a
flame is visible?
YES
Refer to Error Code 12
procedures.
TM061 Rheem 27 Water Star Service Instructions – Issued: 11/10
REV A Issued 08/13
This document is stored and maintained electronically by
Fan is operating; igniter does spark; main burner does not ignite.
Main burner ignites but shuts off after ignition.
Is there any voltage at the
flame sensor connection on
control PCB?
TEST 13
NO
Is flame rod electrode
positioned correctly in flame?
Is white flame rod lead fully
inserted into terminal U on
control PCB?
Clean the flame rod electrode and
main burner. Replace if
necessary.
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled"
NO
NO
NO
NO
YES
NO
NO
YES
NO
YES
Check wiring, if intact replace the
control PCB.
Replace gas valve assembly.
Replace control PCB.
Reposition flame rod electrode.
Rectify flame rod wiring.
29