Takagi T-KJr2-IN User Manual

Troubleshooting
41│Page
110 (T-KJr2)
and 310 (T-K4)
510
(T-D2)
Malfunction
description
Diagnosis
Red
LED
Remote
Remote
N/A N/A 441
Flow Sensor
Failure
(Easy-L
ink
System only)
 Check for connection/breakage of wires and/or debris
on the flow sensor impeller. (Part #402, 717)
Six
Times
51 510
Abnormal
Gas
Solenoid Valve

Check
for connect
ion/breakage of wires (Part #708
)
and/or burn marks on the computer board (Part
#701).
Six
Times
55 N/A
Abnormal Main
Gas Valve

Check
for connect
ion/breakage of wires (Part #708
)
and/or burn marks on the computer board (Part
#701).
Four
Times
61 611
Fan Motor Fault

Check
for connection/brea
kage of wires, dust bui
ldup
in the fan motor (Part #103) and/or burn marks on the
computer board (Part #701).

Check for frozen/corrosion of connectors
(Part #103
)
.
N/A N/A 651
Flow
adjustment
Valve Fault
(Easy-Link
S
ystem
only
)
 Inspect the flow adjustment valve (Part #402), for
connection/breakage of wires (Part #718), locked
motor drive due to scale buildup, and/or water
leakage.
One
Time
70 701
Computer board
Fault

Check for
connection/b
reakage of wires (Part #714
)
and/or burn marks on the computer board (Part
#701).
 Check the power supply of the water heater.
Six
Times
72 721
False Flame
Detection

For indoor models
, check if
condensate drain
is
installed on the vent collar of the water heater.
 Check if there is leaking from heat exchanger (Part
#401
)
.
N/A 74 741
Miscommunication
between Water
heater and remote
controller

Check the model type of the remote controller.
 Inspect the connections between the water heater
and remote controller.

Ch
eck the power supply of the water heater.
N/A N/A
761
Misco
mmunication in
Easy
-
L
ink
system

Check if the connections betwe
en the parent
unit and
the child
units are correct. Refer to p.24 to 27.
Five
Times
99 991
Imperfect
combustion

Check the gas type of the water heater.
 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.

Takagi T-KJr2-IN Specifications

General

Brand	Takagi
Model	T-KJr2-IN
Category	Water Heater
Language	English