17
Check for an Error Code
When a failure occurs, information relating to the
error flashes on the Status Display or optional
Remote Controller. At the same time, a buzzer will
be used. To stop the buzzer sound, the Operation
button must be turned off.
If this occurs, take appropriate measures as the
following list.
Main Controller
flashing
Status Display
Error Code : 99
Cause : Abnormal combustion
Action : Contact the installer or Customer Service
for assistance.
Indication on the Status Display :
Cause : “Lo”means that the water flow is under
minimum operating water flow and is
insufficient to turn on the burner.
Indication on the Status Display :
Cause : “L1”, ”L2” or “L3” means that water flow
rate is more than minimum operating
flow, but is insufficient to turn on the
burner because of high temperature of
inlet water. This continues to be displayed
for an hour after closing the tap.
Indication on the Status Display :
Cause : This isn’t an error message. “FP” is
indicated when freeze prevention is
working.
Error Code : 11
Cause : Ignition failure
Action : Check whether the gas valve is open. Press
the Operation button to turn the Water
Heater off, open a hot water fixture, and
turn the Water Heater back on. In this
error code, you may be able to clear the
error code simply by turning the hot water
fixture OFF, then ON again. If the blinking
number doesn’t return the problem is
solved.
Error Code : (On the Status Display)
901, 903, 908
(On the Remote Controller) 90
Cause : Abnormal combustion
Action : If the display continues, contact the
installer or Customer Service for
assistance.
Error Code : (On the Status Display)
902
(On the Remote Controller) 90
Cause : Abnormal combustion, low gas supply
pressure.
Action : Have a professional check the gas supply
pressure. Contact the installer or Customer
Service for assistance.
Contact Customer Service if:
• Any other error code appears.
• An error code is indicated again after the
above actions were followed.
• There are any other questions.
In some cases, you may be able to clear the error
code by turning the hot water fixtures OFF, then
ON again. If the error code still remains, contact
the installer or Customer Service for assistance.
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