33
110 & 310 510
Malfunction description Diagnosis
Red LED TK-RE02 TM-RE30
Five Times 99 991 Imperfect combustion Check the gas type of the water heat-
er.
Inspect the environment around the
water heater. Determine how long the
unit has been installed.
Check the altitude/elevation of the area
of where the water heater installed.
Check if there is any blockage in the
intake air and/or exhaust.
If the water heater is installed as
a direct-vent system, check whether
there is enough distance between the
intake air terminal and the exhaust
terminal.
Check if there is grease and/or dirt
in the burner (Part #101) and the fan
motor (Part #104), especially if the
water heater has been installed in a
contaminated area.
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