Rheem IKONIC RTGH-S11i Training And Service Manual page 57

ERROR CODE DIAGNOSTICS
2.2 ERROR CODE LIST
A065 ERROR CODE
Water volume control valve malfunction
The water volume control valve will only activate IF de-
mand for hot water EXCEEDS the unit's limitations.
If water flow is within the unit's limitations, you will not
get a voltage reading for diagnostics.
Turn Power OFF
Remove and reinsert connector "G".
Visually inspect water volume control valve
for loose or damaged connections. Reas-
semble & operate unit.
Turn power ON and operate unit.
Is "A065" error
code appeared?
Yes
While water is flowing, the unit is at-
tempting to ignite.
Measure DC voltage between #4 wire
(White) & #16 wire (Black) at connector
"G".
Is the voltage
4-16 DC volts?
Yes
Turn power OFF then ON.
While water is flowing, the unit is at-
tempting to ignite.
Measure DC voltage between #14 wire
(Red) & #16 wire (Black) at connector "G".
Unit has a loose con-
No
nection.
Unit appears to be
operating.
Check connector "G",
and operate unit again.
No
If "A065" error code
is appeared, replace
control board.
57
IKONIC Tankless Water Heater Service Manual
Diagnostic check items
• Water volume control valve.
Is the voltage
4-16 DC Volts?
While water is flowing, the unit is attempting
to ignite.
Measure DC voltage between #12 wire
(Green) & #16 wire (Black) at connector "G".
Is the voltage
4-10 DC volts?
Yes
Operare unit again.
If "A065" error code is appeared, replace
water volume control valve.
Check connector "G"
and operate unit again.
No
If "A065" error code
is appeared, Replace
Yes
Check connector "G",
and operate unit again.
No
If "A065" error code
is appeared, Replace
control board.
control board.