47
LDAP-IOM (01-22) 207733-A
Figure 23. DSI Control Module Troubleshooting Flowchart
Tr
ial for Ignition Call for Heat
Is there
a
spark across gap at
ignitor
?
Does ga
s
ignite?
Is there minimum flame current at th
e
flame sensor
?
Is there
minimum flame current
at the control
module
?
Replace contro
l
module
.
Check connections to flam
e
sensor and/or moisture in th
e
burner assembly
.
Is the flame
sensor corroded?
Clean flam
e
sensor
.
Is the sensor located in flame
correctly?
Replace flame
sesnso
r.
Reposition flame sensor
.
Is ga
s
flowing
?
Is the ignito
r
position correct in th
e
gas flow?
Check gas pressure and supply voltage
.
If either are low
,
correct and repeat
startup.
Repositio
n
spark ignito
r.
Is ther
e
24
VA
C at the ga
s
valve?
Is there 24
VA
C
from gas valve output on
control module to
chassis?
Check wiring an
d
connections to
gas valve.
Replace ignition contro
l
module.
Replace ga
s
valve.
Is ther
e
spark voltage at
control?
Check high voltage wire continuit
y.
Is there 24V P1-
2
to power control?
Replace contro
l
module.
Check wiring and/or 24V
AC
transformer output
.
YE
SN
O
YE
SN
O
YE
SN
O
YE
S
NO
YE
S
NO
YES
NO
YE
SN
O
YES
NO
NO
YE
S
YE
SN
O
YE
S
NO
YE
S
NO
