IKONIC Tankless Water Heater Service Manual
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2.2 ERROR CODE LIST
A070 ERROR CODE
Microcomputer Abnormality.
If the microcomputer on the control board is not work-
ing properly, the water heater displays the “A070” error
code on the User Interface.
Diagnostic check items
• Control board
A071 ERROR CODE
SV Circuit Failure.
If the solenoid valve (SV) is not working properly, the
water heater displays the “A071 ” error code on the
User Interface.
Diagnostic check items.
• Control board
ERROR CODE DIAGNOSTICS
Turn Power OFF
Turn Power OFF
Turn power ON and operate unit.
If "A070" error code is appeared, please
replace the control board.
Turn power ON and operate unit.
If "A071" error code is appeared, please
replace the control board.
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