Takagi T‐KJr2‐IN Installation Manual And Owner's Manual page 41

T‐KJr2‐IN/OS T‐D2‐
& T‐K4‐IN/OS IN/OS
Red
RE02 RE30
LED
441 Flow Sensor
N/A N/A
510 Abnormal Gas
Six 51
Times
N/A Abnormal Main
Six 55
Times
611 Fan Motor Fault
Four 61
Times
651 Flow adjustment
N/A N/A
701 Computer board
One 70
Time
721 False Flame
Six 72
Times
N/A 74 741
761
N/A N/A
991 Imperfect
Five 99
Times
Malfunction
description
• Check for connection/breakage of wires and/or debris
Failure (Easy‐Link
System only)
• Check for connection/breakage of wires (Part #708)
Solenoid Valve
• Check for connection/breakage of wires (Part #708)
Gas Valve
• Check for connection/breakage of wires, dust buildup in
• Check for frozen/corrosion of connectors (Part #103).
• Inspect the flow adjustment valve (Part #402), for
Valve Fault
(Easy‐Link
System only)
• Check for connection/breakage of wires (Part #714)
Fault
• Check the power supply of the water heater.
• For indoor models, check if condensate drain is installed
Detection
• Check if there is leaking from heat exchanger (Part
• Check the model type of the remote controller.
Miscommunication
• Inspect the connections between the water heater and
between Water
heater and remote
• Check the power supply of the water heater.
controller
• Check if the connections between the parent unit and
Miscommunication
in Easy‐Link system
• Check the gas type of the water heater.
• Inspect the environment around the water heater.
combustion
• Check the altitude/elevation of the area of where the
• Check if there is any blockage in the intake air and/or
• If the water heater is installed as a direct‐vent system,
• Check if there is grease and/or dirt in the burner (Part #
41
Diagnosis
on the flow sensor impeller. (Part #402, 717)
and/or burn marks on the computer board (Part #701).
and/or burn marks on the computer board (Part #701).
the fan motor (Part #103) and/or burn marks on the
computer board (Part #701).
connection/breakage of wires (Part #718), locked motor
drive due to scale buildup, and/or water leakage.
and/or burn marks on the computer board (Part #701).
on the vent collar of the water heater.
#401).
remote controller.
the child units are correct. Refer to p.24 to 27.
Determine how long the unit has been installed.
water heater installed.
exhaust.
check whether there is enough distance between the
intake air terminal and the exhaust terminal.
101) and the fan motor (Part # 104), especially if the
water heater has been installed in a contaminated area.
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Troubleshooting