Rheem RTG2-42 - Error Code 12: Flame Failure

SVC 810 Tankless Troubleshooting Manual
48
Scenario 3 – Error Code 11; main burner ignites, but shuts off after ignition.
No
Is the resistance
of the
Proportional
Gas Control
Valve OK?
No
Yes
Measure the resistance of connector R
between Black#2 and Red#1 wires:
40 to 80 Ohms
Re
p
lace Gas Control Ass
y
Check or re
p
lace main burne
r
Does the 0y
display indicate
any remaining
flame?
No
Yes
Measure the electric current of
Flame Rods connector M/L/T
between wires and ground: 1 to 100
VA
C
Clean or replace main
burner and Flame Rod
Electrode
Tr
y
to i
g
nite main burne
r
Dis
p
la
y
maintenance information 0
y
Is there any
flame current?
Yes
Refer to Error code 12
procedures
Replace Printed Circuit
Board
Flame Rod Status: X=not detecting flame; O=is detecting flame
0y display 00 01 02 03 04 05 06 07
Flame Rod 1(white) X O X O X O X O
Flame Rod 2(red) X X O O X X O O
Flame Rod 3(blue) X X X X O O O O
Note: Notice the colors of the wires to the gas valve solenoids are the same
color as the respective flame rods
. Flame Rod 1 is the white wire and goes
to the right front half burner. Flame Rod 2 is the red wire and goes to the
right rear half burner.
Flame Rod 3 is the blue wire and goes to the left burner. (74 Series Only)
Normal flame rod status in the control panel with the burner on should be
01, 03 or 07.
If the burner has been removed for any reason AND any other flame rod
status showing detecting flame (zero) probably indicates the flame rod
wires are not correctl
y
connected at the flame rod on the burner.