Takagi T-K3 - Troubleshooting Error Codes

T-K3 Service Manual
Ver. 1.05
34
CONFI DENTIAL
Error Code
Checkpoint
Check the dipswitch settings on PCB
Warning for the "991" error code
(Refer to section 12-3)
Checkpoint
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.
Checkpoint
1 Check
g
as su
pp
l
y
and
p
ressu re (Refer to section 1)
2
Check the i
g
niter
(
Refer to section 10-18
)
①
Cracks/soot on igniter rod
② Improper gap between burner & igniter rod
Normal gap: 0.16"
③
PCB fault
Normal: AC 90
～
110V at #7
(p
ur
p
le-
p
ur
p
le
)
④ Igniter fault
3 PCB fault
①
No voltage to main gas solenoid valve (MV) C
Normal: DC78
～
100V between COM
(
blue
)
& #3
(
li
g
ht blue
)
②
No volta
g
e to
g
as solenoid valve
(
S
V
1
)
Normal: DC78
～
100V between COM
(
blue
)
& #9
(g
ree n
)
③
No volta
g
e to
g
as
p
ro
p
ortional valve
(
VG 0
)
H1
Normal: DC1
～
15V between white & red
4 Gas solenoid valve fault
① Main gas solenoid valve (MV) fault C
Normal: 0.9
～
1.3k
Ω
between COM
(
blue
)
& #3
(
li
g
ht blue
)
②
Gas solenoid valve
(
SV 1
)
fault
Normal: 1.3
～
1.9k
Ω
between COM
(
blue
)
& #9
(g
reen
)
③ Gas
p
ro
p
ortional valve
(
VG 0
)
fault H1
Normal: DC1
～
15V between white & red
5 Disconnected/dama
g
ed O.H.C.F. C2
Visual inspection:connection/breakage of wires.
Normal: 1
Ω
or less between blue & blue
031
Error Code Malfunction description Cancellation method
Malfunction description Cancellation method
Dipswitch setting fault
Turn off the power or water
supply
Dia
g
nosis
On the PCB, press the INC and
DEC buttons simultaneously for 3
sec. Then turn the power off.
Diagnosis
Error Code Malfunction descri
p
tion Cancellation method
101
Ignition failure
Turn off the power or water
supply
Diagnosis
111
Error code is
shown after
three failed
attempts at
ignition
B2
Visual inspection: connection/breakage of wires and/or
observed weak spark.
(Refer to section 10-13)