IKONIC Tankless Water Heater Service Manual
56
ERROR CODE DIAGNOSTICS
2.2 ERROR CODE LIST
A055 ERROR CODE
Gas motor failed.
The venturi in this water heater has a butterfly valve
to control air volume. The motor adjusts the position
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 venture assembly
Turn Power OFF
Remove and reinsert connector "J".
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 "J"
and operate unit again.
If "A055" error code
is appeared, Replace
control board.
Check connector "J",
and operate unit again.
If "A055" error code
is appeared, replace
control board.
Check connector "J",
and operate unit again.
If "A055" error code
is appeared, Replace
control board.
While water is flowing, the unit is at-
tempting to ignite.
Measure DC voltage between #2 wire
(White) & #8 wire (Black) at connector "I"
While water is flowing, the unit is attempting
to ignite.
Measure DC voltage between #6 wire
(Green) & #8 wire (Black) at connector "J".
Turn power OFF then ON.
Operare unit again.
If "A066" error code is appeared, replace
water volume control valve.
While water is flowing, the unit is at-
tempting to ignite.
Measure DC voltage between #7 wire
(Red) & #8 wire (Black) at connector "J".
Is "A055" error
code appeared?
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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