Rheem RTG74 User Manual

SVC 810 Tankless Troubleshooting Manual
58
Error Code 52
Explanation: Proportional Gas Flow Regulator (P.G.F.R.) Valve fault. Check gas inlet solenoid
valve wiring harnesses for loose or damage terminals; and connections to the circuit board are
tight.
Yes
No
Flame Rod Status (Flame Rod #3 for 74 Series Only)
0y
display
00 01 02 03 04 05 06 07
Flame
Rod 1
X O X O X O X O
Flame
Rod 2
X X O O X X O O
Flame
Rod 3
X X X X O O O O
X=Not detecting flame
O=is detecting flame
The water heater seems to be normal. Tr
y
to o
p
erate a
g
ain
Does the 0y
display indicate
any remaining
flame?
Pull out the relay connection of flame rod connectors (M), (L),
(T) and then display maintenance information [0y].
Does the 0y
display indicate
any remaining
flame?
No
Clean or re
p
lace Main Burner and Flame Rod Electrodes
Re
p
lace Printed Circuit Board
Yes
Re
p
lace P.G.R.F Valve
Is there power
to the P.G.R.F.
valve?
Yes
No
Re
p
lace the Printed Circuit Board
With the unit attempting to go to main burner, measure the voltage
at connector R between the Red#1 and Black #2 wires for:
1.5 to 14 VDC

Rheem RTG74 Specifications

General

Brand	Rheem
Model	RTG74
Category	Water Heater
Language	English