John Wood Takagi - 110-310-510 - Manual (Page 31)

31
Fault Analysis Of Error Codes
If the error code is displayed on the computer board of the water heater or remote controller, please check the following.
After checking, consult with the manufacturer.
110 & 310 510
Malfunction description Diagnosis
Red LED TK-RE02 TM-RE30
One Time 03 031 Incorrect DIPswitch setting Check the DIPswitch settings on the
PCB. (Part #701) •
Five Times 10 101 Warning for the “991” error
code Check the gas type of the water heat-
er.
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 the altitude/elevation of area of
where the water heater installed.
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. •
•
•
•
•
Three Times 11 111 Ignition failure Check if the Hi-limit switch (Part #412)
is properly functioning.
Check for connection/breakage of
wires (Part #413, 708, 709, 710, 712),
burn marks on the computer board
(Part #701), and/or soot on the flame
rod (Part #108).
Check if there is a buzzing spark igni-
tion sound coming from the burner
(Part #101) when water heater pre-
pares for combustion.
Listen for the double “clunk” sound
coming from gas valve assembly (Part
#102) when water heater goes into
combustion.
Check if there is leaking from heat
exchanger. (Part #401) •
•
•
•
•
Three Times 12 121 Loss of flame Check if the Hi-limit switch (Part #412)
is properly functioning.
Check for connection/breakage of
wires (Part #413, 708, 709, 710, 712),
burn marks on the computer board
(Part #701), and/or soot on the flame
rod (Part #108).
Check if there is leaking from heat
exchanger. (Part #401) •
•
•
Two Times 31
32 311
321 Output thermistor failure Check for connection/breakage of
wires and/or debris on thermistor. (Part
#407, 408, 411, 716) •
Inlet thermistor failure
N/A N/A 331 Mixing thermistor failure
Two Times 39 391 Air–fuel Ratio Rod failure Check for connection/breakage of
wires (Part #709) and/or soot on the
AFR rod. (Part #108) •