Fault Analysis Of Error Codes - Takagi 110 Outdoor Installation Manual And Owner's Manual

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 and 310 510
Red Remote
Remote
LED 7 Seg LED
One 03* 031*
Flash
10 101
Five
Flashes
11* 111*
Three
Flashes
12* 121*
Three
Flashes
31* 311*
Two
Flashes
32* 321*
Two
Flashes
331*
N/A N/A
*These error codes will be cleared when water flow stops.

-Fault analysis of error codes-

Malfunction
description
Incorrect DIP • Check the DIP switch settings on the PCB (Part #701).
switch setting
Warning for the • Check the gas type of the water heater.
"991" error code • 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 is 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.
Ignition failure • Check if the Hi-limit switch (Part #412) is functioning
properly.
• 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 ignition sound coming
from the burner (Part #101) when water heater prepares
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).
Loss of flame • Check if the Hi-limit switch (Part #412) is functioning
properly.
• 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).
Outlet
thermistor
failure
• Check for connection/breakage of wires and/or debris on
thermistor (Part #407, 408, 411, 716).
Inlet thermistor
failure
Mixing thermis-
tor failure
47
Page
Owner's Guide
Troubleshooting
Diagnosis