Takagi T-K3 Service Manual page 34

Error Code
Dipswitch setting fault
031
Check the dipswitch settings on PCB
Error Code
Warning for the "991" error code
101
(Refer to section 12-3)
1 Check if there is any blockage in the air inlet of the unit.
2 Check if there is any blockage along the exhaust run.
3 Check the manifold pressure in the T-K3.
Error Code
Ignition failure
111
1 Check gas supply and pressure (Refer to section 1)
2 Check the igniter (Refer to section 10-18)
Error code is Visual inspection: connection/breakage of wires and/or
observed weak spark.
shown after
three failed ① Cracks/soot on igniter rod
attempts at
Improper gap between burner & igniter rod
②
ignition
Normal gap: 0.16"
③ PCB fault
Normal: AC 90 ～ 110V at #7 (purple-purple)
Igniter fault
④
3 PCB fault
① No voltage to main gas solenoid valve (MV)
Normal: DC78 ～ 100V between COM (blue) & #3 (light blue)
No voltage to gas solenoid valve (SV
②
Normal: DC78 ～ 100V between COM (blue) & #9 (green)
No voltage to gas proportional valve (VG
③
Normal: DC1 ～ 15V between white & red
4 Gas solenoid valve fault
Main gas solenoid valve (MV) fault
①
Normal: 0.9 ～ 1.3k Ω between COM (blue) & #3 (light blue)
Gas solenoid valve (SV
②
Normal: 1.3 ～ 1.9k Ω between COM (blue) & #9 (green)
Gas proportional valve (VG
③
Normal: DC1 ～ 15V between white & red
5 Disconnected/damaged O.H.C.F.
Visual inspection:connection/breakage of wires.
Normal: 1 Ω or less between blue & blue
Malfunction description
Diagnosis
Malfunction description
Diagnosis
Malfunction description
Diagnosis
) fault
1
34
Cancellation method
Turn off the power or water
supply
Cancellation method
On the PCB, press the INC and
DEC buttons simultaneously for 3
sec. Then turn the power off.
Cancellation method
Turn off the power or water
supply
)
1
)
0
) fault
0
(Refer to section 10-13)
CONFIDENTIAL
T-K3 Servi c e Manual
Ver. 1.05
Checkpoint
Checkpoint
Checkpoint
B2
C
H1
C
H1
C2