Rheem RTG74 User Manual

SVC 810 Tankless Troubleshooting Manual
30
Scenario 3 – Error Code 11; main burner ignites, but shuts off after ignition.
Error Code 51 (RTG 66 Only)
Explanation: Gas Inlet Solenoid Valve fault. At a minimum check the following:
1. Check gas valve wiring harnesses for loose or damage terminals
2. Check connections to the circuit board are tight.
No
Does the 0y
display indicate
any remaining
flame?
No
Yes
Measure the electric current of
Flame Rods connector M between
white wire 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
Flame Rod 1(white) X O
Flame Rod 1 is the white wire at connector M and goes to the burner.
Normal flame rod status in the control panel with the burner on should be 01
or detecting flame.
No
Dis
p
la
y
Maintenance Information 0
y
(
flame rod status
)
Is there any
remaining
flame thru the
view window?
Yes
Re
p
lace Gas Control Assembl
y
Cycle the heater two times by turning off – then on – at 10 second intervals.

Rheem RTG74 Specifications

General

Brand	Rheem
Model	RTG74
Category	Water Heater
Language	English