Rheem Iconic RTGH-S11i Training And Service Manual page 46

IKONIC Tankless Water Heater Service Manual
ERROR CODE DIAGNOSTICS
2.2 ERROR CODE LIST
A012 ERROR CODE
Unit Detected Flame and Lost It.
Venting
Check the condition of venting (Exp. The connections
of vents, the terminal vent top)
If the connection of venting is removed or the terminal
vent top is closed by something, reconnect the vents or
clean the terminal vent top (Both inlet side and exhaust
side)
Refer to section "1.1.2 Venting for direct vent water
heat" in this manual or refer to U&C manual for instal-
lation instructions.
Turn Power OFF
Remove connector "H" and terminal on
flame rod, and reinsert them.
Is the flame
touching the flame
rod?
Yes
Remove and clean flame rod.
Reassemble it, and operate unit.
Is error code
"A012" ap-
peared?
Yes
Flame rod test is OK.
Replace control board.
46
Flame rod (Flame is visible)
Check the gas supply pressure at the gas connection
of the water heater.
Remove & reinsert connector "C".
Operate unit again.
No
If A012-Error code appears
Check gas-air ratio valve and
solenoid valve.
No
Flame rod needed to be cleaned
and is OK.
Turn gas ON and check for normal.