Takagi T-K3 - Wiring Diagram

T-K3 Service Manual
Ver. 1.05
35
CONFI DENTIAL
Checkpoint
6C1
Normal:1
Ω
or less between blue & blue
7 Inspect flame rod I
①
Check for any soot on the rod.
②
(in this case, the wire is contacted to the manifold surface.)
③
PCB fault
④ Flame rod fault (insulated resistance)
Normal: 40KHz
～
60KHz
(
between oran
g
e &
g
reen
)
8 Check if hi-limit switch is properly functioning.
Checkpoint
1 Check gas supply and pressure (Refer to section 1)
2 PCB fault
① No voltage to gas main 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
(
SV 1
)
③
No volta
g
e to
g
as
p
ro
p
ortional valve
(
VG
0
)
H1
Normal: DC1
～
15V between white & red
3 Gas solen oid 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: 0.9
～
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
4 Check for soot on the flame rod I
①
Clean the flame rod
②
PCB fault
③
Flame rod fault (insulated resistance)
Normal: 40KHz
～
60KHz
(
oran
g
e &
g
reen
)
Error code is
shown after
three failed
attempts at
ignition
Check the connection of ground wire; make sure there is firm
contact to the
g
round of the T-K3
During operation: more than 1μA through the flame rod wire
(orange)
Error Code Malfunction description Cancellation method
Error Code Diagnosis
111 Visual ins
p
ection: connection/breaka
g
e of wires.
Disconnected/dama
g
ed hi-limit switch.
(Refer to section 10-12)
Flame blows out
Turn off the power or water
su
pp
l
y
Diagnosis
Error code is
shown after
three failed
attempts at
ignition
Normal: DC78
～
100V between COM (blue) & #9 (green)
121
During operation: more than 1μA through the flame rod wire
(orange)