Service manual

31
Nature of Fault
Examination
Point
Diagnostic Point Values Y/N Action
Service
Procedure
Error code "11"
displayed on
d
igital monitor.
5. Check ignition
module.
1
. Measure voltage
between grey
~
grey of
connector F
8
(ignition
module
).(See page 37)
2
. # Remove connector
F
8
and measure the
resistance between
ignition module and
t
erminals.
(
See page 37)
90
~
110 V A C
Is resistance >1MΩ?
Yes
N
o
Yes
No
Go to B-5-2
R
eplace PCB
Go to B-5-3
Adjust/
R
eplace
i
gnition
module
IGE – 2
I
GE – 4
3. Chec
k if unit is
sparking.
Is the ignition
module
sparking?
Yes
No
Go to B-6
Adjust/
Replace
electrode
6. Check main gas
solenoid valve (SV0)
Error code 71
1. # Disconnect the main
solenoid valve connector
E from the PCB, and
measure the resistance
between pink
~
black
(SV0)
2. Measure voltage
between pink
~
black of
SV0 connector.
(See page 38)
1.7
~
2.1KΩ
80
~
100 VDC
Yes
No
Yes
No
Go to B-6-2
Replace gas
valve
Go to B-7
Replace PCB
IGE – 9
IGE – 2
7. Check solenoid
valve (SV1)
1. # Disconnect
connector E from the
PCB. Measure resistance
between yellow
~
black
of (SV1).
2. Measure voltage
between yellow
~
black
of SV1 connector.
(See page 38)
1.7
~
2.1KΩ
80
~
100 VDC
Yes
No
Yes
No
Go to B-7-2
Replace gas
valve
Go to B-8
Replace PCB
IGE – 9
IGE – 2
8. Check
changeover solenoid
v
al
v
e (SV2)
1. # Disconnect
connect
or E fr
om the
PCB. And measure
resistance between blue
~
black (SV2)
2. Measure the voltage
between blue
~
black or
SV2 connector.
(See page 38)
1.7
~
2.1KΩ
80
~
100 VDC
Yes
N
o
Yes
No
Go to B-8-2
R
eplace g
as
valve
Go to B-9
Replace PCB
IGE – 9
IGE – 2
Er
r
or code "1
4"
displayed on
digit
al monit
or
9. Chec
k t
her
mal
fuse
1
0. Chec
k overheat
(remaining flame) bi-
metal switch
1
. # Disconnect
connector B
3
and C
3
measur
e r
esis
t
ance
between red
~
red.
2. # Disconnect OHS
(remaining flame) bi-
met
al switch festoon
terminal B
3
and C
3
, and
measure resistance
betw
een t
er
minal on
swit
c
h. (
See pag
e 40)
Is r
esis
t
ance < 1Ω?
Is r
esis
tance < 1Ω?
Y
es
No
Y
es
N
o
Go t
o B-
1
0
Replace
t
her
mal fuse
R
eplace PCB
Replace
remaining
flame bi-metal
switch
IGE – 11
IGE – 2
VI - TROUBLESHOOTING (cont.)
Troubleshooting Flow Chart
BEFORE CARRYING OUT CHECKS MARKED WITH
A # SIGN, DISCONNECT THE POWER SUPPLY.