IKONIC Tankless Water Heater Service Manual
53
ERROR A063
EXPLANATION
Pump abnormality
If the water flow sensor does not detect water flow when
the recirculation pump is working, the water heater dis-
plays the “A063” error code on the User Interface.
Diagnostic check
• Recirculation Pump (Internal or external).
Turn Power OFF
Remove and reinsert connector "A" on the
control board and blue molex to connect to
pump.
Visually inspect for loose or damaged con-
nections.
Turn power ON and operate pump.
Unit had a loose connection.
Unit appears to be operating.
Check connector "A" and operate unit again.
If "A063" error code returns, Replace control
board.
While pump is operating, measure AC
voltage between #3 wire (White) & #4 wire
(Black) at connector "A".
Replace pump (internal or external).
Did "A063" error
code appear?
Is the voltage
108-132 AC volts?
Yes
No
No
Yes
ERROR CODE DIAGNOSTICS
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