IKONIC Tankless Water Heater Service Manual
51
ERROR CODE DIAGNOSTICS
ERROR A055
EXPLANATION
Gas motor failed.
The venturi in this water heater has a butterfly valve to
control air volume. The motor adjusts the position of this
butterfly valve. If the motor controlling the butterfly valve
does not work properly, the water heater displays the
“A055” error code on the User Interface.
Diagnostic check items
• Gas control motor on the Venturi assembly
Turn Power OFF
Remove and reinsert connector “J”.
Visually inspect gas control motor for
loose or damaged connections. Reas-
semble & operate unit.
Turn power ON and operate unit.
Unit had a loose con-
nection.
Unit appears to be
operating.
Check connector “J” and
operate unit again.
If "A055" error code
appears, Replace control
board.
Check connector “J”, and
operate unit again.
If “A055” error code
appears, replace control
board.
Check connector "J", and
operate unit again.
If “A055” error code
appears, Replace control
board.
While water is flowing, and the unit is at-
tempting to ignite.
Measure DC voltage between #2 wire
(White) & #8 wire (Black) at connector “J”
While water is flowing, and the unit is at-
tempting to ignite.
Measure DC voltage between #6 wire
(Green) & #8 wire (Black) at connector “J”.
Turn power OFF then ON.
Operate unit again.
If “A055” error code appears, replace gas
control motor.
While water is flowing, and the unit is at-
tempting to ignite.
Measure DC voltage between #7 wire (Red)
& #8 wire (Black) at connector "J".
Did “A055” 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
CAUTION: Hot water temperatures above 120 will
scald. Return to original setting once test is complete.
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