Takagi T-K3 - Page 38

T-K3 Service Manual
Ver. 1.05
38
CONFI DENTIAL
Checkpoint
1 PCB and flow adjustment valve fault.
(Refer to section 10-8 & 10-15)
Normal: DC 7
～
16V between
(
black-red
)
1 PCB fault
①
②
Checkpoint
1 Check the PCB (Refer to section 10-15)
Checkpoint
1 False flame detection (5 sec.)
Flame rod (insulated resistance) fault
Checkpoint
1
2 Check for signs of power surges.
Diagnosis
Error Code Malfunction descri
p
tion Cancellation method
Miscommunication between T-K3 and
temperature remote controller
Restoring proper cable
connections between the T-K3
and the Remote controller (TM-
RE10 or TM-RE30). When the
computer det ects proper
connections between the the T-
K3 and the remote controller,
"741" error code will cease to
display.
Diagnosis
Visual inspection: connection/breakage of wires and/or burn
marks on the computer board.
Error Code Malfunction descri
p
tion Cancellation method
False flame detection
Turn off the power or water
supply
Diagnosis
I
Error Code Malfunction description Cancellation method
Turn off the power or water
supply
Fault of preparation for the outlet
thermistor operation.
Fault of driving circuit for Gas
Proportional Valve(VG
0 )
Dia
g
nosis
J1
Visual
inspection
of
flow
adjustment
valve:
connection/breakage
of wires, motor drive locked due to scale buildup, and/or water
leakage
Visual inspection PCB: connection/breakage of wires and/or
burn marks on the computer board.
Error Code Malfunction description Cancellation method
Flow adjustment valve fault
Turn off the power or water
supply
701
651
741
Temperature remote controller (TM-RE10 / TM-RE30) or PCB
fault
721