18
TROUBLESHOOTING GUIDE
Flameout during usage
Yellow ame with smog
Abnormal smell
Abnormal sound during ignition
Ignition failed after opening the
water heater
Water not hot enough when turned
to
Water still too hot when at
‘Low Temperature’ position
Flame can’t be extinguished after
closed
Flameout when at ‘Low Temperature’
position
Deagration symptom during ignition
Main gas valve not opened
Main gas valve half opened
Main cold water supply not
opened
Freezing
Lack of fresh air
Safety device is working
Malfunction of electric
controlled system
Combustor clogged
Heat exchanger clogged
Malfunction of water
controlled device
Positional changer of
ignition distance
Cold water supply pressure
is too high
Not enough water ow
through the unit
Cold water pressure not sucient
Improper operation for
water temperature adjusting
Air inside the gas pipe
Gas pressure
is not suitable
High
Low
Completely open the gas
valve
or replace the gas tank with
Continuosly open and close
the hot water valve until the
ame is ignited
Fully open the gas valve
Fully open the main water
supply valve
The water heater can be used
only after the ice is melted
Asked maintenance personnel to
check the water pressure
Ventilate the room immediately
Re-start the water heater. If still
doesn’t work, contact the
maintenance dept.
Adjust the ignition distance
Contact the maintenance dept.
Same as above
Same as above
Same as above
Adjust the cold water supply
Increase water ow through
the unit
Turn the water & gas controlling
valves to the right position
Asked maintenance personnel to
check the water supply valve and
water pressure adjusting valve
SOLUTIONS
TROUBLE-
SHOOTING
CASE
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