IKONIC Tankless Water Heater Service Manual
54
ERROR CODE DIAGNOSTICS
ERROR A065
EXPLANATION
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.
Diagnostic check items
• Water volume control valve.
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.
Unit has a loose con-
nection.
Unit appears to be
operating.
Check connector "G" and
operate unit again.
If “A065” error code
appears, Replace control
board.
Check connector "G", and
operate unit again.
If “A065” error code
appears, replace control
board.
Check connector "G", and
operate unit again.
If “A065” error code
appears, Replace control
board.
While water is flowing, and the unit is at-
tempting to ignite.
Measure DC voltage between #4 wire
(White) & #16 wire (Black) at connector
"G".
While water is flowing, and the unit is attempt-
ing to ignite.
Measure DC voltage between #12 wire
(Green) & #16 wire (Black) at connector "G".
Turn power OFF then ON.
Operare unit again.
If "A065" error code is appeared, replace water
volume control valve.
While water is flowing, and the unit is at-
tempting to ignite.
Measure DC voltage between #14 wire
(Red) & #16 wire (Black) at connector "G".
Did “A065” error
code appear?
Is the voltage
4-16 DC Volts?
Is the voltage
4-16 DC volts?
Is the voltage
4-10 DC volts?
Yes
Yes
No
No
No
No
Yes
Yes
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