Takagi T-K3 Service Manual page 36

Error Code Malfunction description
5 Disconnected/damaged O.H.C.F. (Refer to section 10-13)
121
Visual inspection:connection/breakage of wires.
Normal: 1 Ω or less between blue & blue
Error code is
6 Check if hi-limit switch is properly functioning.
shown after
Disconnected/damaged hi-limit switch. (Refer to section 10-12)
7
three failed
Visual inspection: connection/breakage of wires.
attempts at
Normal: 1 Ω or less between blue & blue
ignition
Error Code Malfunction description
Disconnected/short-circuited outlet
311
thermistor
1 Outlet thermistor fault
Visual inspection: connection/breakage of wires and/or debris
on thermistor.
Check voltage/resistance between black & black (#12).
Refer to Section 8 for proper range of values.
Error Code Malfunction description
Disconnected/short-circuited inlet thermistor
321
1 Inlet thermistor fault
Visual inspection: connection/breakage of wires and/or debris
on thermistor.
Check voltage/resistance between black & black (#42).
Refer to Section 8 for proper range of values.
Error Code Malfunction description
Disconnected/short-circuited mixing
331
thermistor
1 Mixing thermistor fault
Visual inspection: connection/breakage of wires and/or debris
on thermistor.
Check voltage/resistance between black & black (#113).
Refer to Section 8 for proper range of values.
Error Code Malfunction description
Disconnected AFR rod
391
1 AFR rod fault
Visual inspection:connection/breakage of wires and/or soot buildup.
Cancellation method
Cancellation method
Turn off the power or water
supply
Diagnosis
(Refer to section 10-11)
Cancellation method
Turn off the power or water
supply
Diagnosis
(Refer to section 10-11)
Cancellation method
Turn off the power or water
supply
Diagnosis
(Refer to section 10-11)
Cancellation method
Turn off the power or water
supply
Diagnosis
(Refer to section 10-6)
36
CONFIDENTIAL
T-K3 Servi c e Manual
Ver. 1.05
C2
C1
Checkpoint
E2
Checkpoint
E3
Checkpoint
E1
Checkpoint
I