Rheem IKONIC RTGH-S11i Training And Service Manual page 47

ERROR CODE DIAGNOSTICS
2.2 ERROR CODE LIST
A011 ERROR CODE
Flame Not Detected From Flame Rod.
Flame rod (Flame is visible)
If the spark is visible through the sight glass, refer to
the flow chart on the left to check flame rod.
Gas solenoid valve
If the spark is not visible through the sight glass, refer
to the steps to check solenoid valve.
To check solenoid valve, please refer to "A071" Error
code SV malfunction.
Turn Power OFF
Remove connector "H" and terminal on
flame rod, and reinsert them.
touching the flame
Remove and clean flame rod.
Reassemble it, and operate unit.
Replace Flame Rod.
Does Error A011 persist?
Replace control board.
No
Is the flame
rod?
Yes
No
Is error code
"A011" ap-
peared?
Yes
No
47
Gas air ratio valve
If the spark is not visible through the sight glass, refer
to the steps to check gas air ratio valve.
To check gas air ratio valve, please refer to "A071" Er-
ror code Gas SV malfunction.
Remove & reinsert connector "C".
Operate unit again.
If A011-Error code appears
Check gas-air ratio valve and
solenoid valve.
Flame rod needed to be cleaned
and is OK.
Turn gas ON and check for normal.
Check AC voltage to #2 (black) and
#6 (white) while unit is operating.
Is the voltage between
108-132 ACV?
IKONIC Tankless Water Heater Service Manual
Replace Solenoid Valve
No
Check resistance to #5 (black) and
#3 (yellow) on connector "C"
Is the resistance between
0.8kΩ-2.4Ω?
Yes
Check DC voltage to #5 (black) and
#3 (yellow) while unit is operating.
Is the voltage between 90-120 DCV
No
Yes