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T-KJr2-IN / 110 & T-K4-IN / 310 T-D2-IN / 510
Malfunction description
Diagnosis
Red LED
TK-RE02
TM-RE30
Five Times
99
991
Imperfect combustion
•
Check the gas type of the water heater
matches the gas supplied to it .
•
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 is installed
and match DIP switches .
•
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 #103), especially if the
water heater has been installed in a
contaminated area .
•
Check the DIP Switches match gas type
of unit .
•
Check the manifold pressure at Max .
and Min .
•
Check proportional gas valve hose .