IKONIC Tankless Water Heater Service Manual
37
2.1 NO ERROR CODE AND NO HOT WATER
EXPLANATION
No hot water is delivered when water is flowing through
unit and with LCD displaying the hot water temperature
setting.
NOTE: For “NO POWER” complaint (LCD will
not turn on) Check wall outlet for 120V. If
voltage is present, check two 10 amp fuses
at the control board.
When replacing a serviceable component, turn off all
power to the water heater and check for the presence
of power with a multimeter or test lamp.
POSSIBLE CAUSE
• Water flow (0.4 GPM to active)
• Unit was not setting “Enable”.
• Water flow sensor
SETTING "DISABLE/ENABLE"
NOTE: This tankless water heater needs to
be set to “Enable” on the user interface. (The
factory setting is “Disable”.) See instructions
below:
1. Press the “MODE” button.
2. “Disabled” shows on LCD after “Enable/Disable” is
displays.
3. Press the “ENTER” button.
WATER FLOW SENSOR
1. Use cold water shutoff valve to turn OFF water sup-
ply to unit.
2. Turn power switch to OFF position. Wait 10 sec-
onds.
3. Turn power switch to ON position. Wait 20 seconds,
Confirm Mode is Enabled.
4. Turn water supply ON; check the nearest hot water
fixture for hot water.
FINAL CHECK: Water flow sensor in water
volume control valve.
1. Check the voltage between #10 wire (Red) and #8
wire (Black) at the connector “ I ”.
• With the unit turn ON and no water flow, you should
read 11 to 17 DC volts.
• If reading is not 11 17 DC Volts, replace the control
board.
2. If you have voltage, check the voltage between
#9 wire (Brown) and #8 wire (Black) with the water
flowing.
• If you have a reading and no main burner, replace
the control board.
• If you do not have a reading, remove any debris
from water volume control valve.
ERROR CODE DIAGNOSTICS
SETTINGS
BACK ENTER
STATUS SERVICE MODE
DISABLED
SETTINGS
BACK ENTER
STATUS SERVICE MODE
DISABLED
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