PAGE 20 — DEF TANK REPLENISHMENT SYSTEM • OPERATION MANUAL — REV. #0 (09/11/20)
FAULT/ERROR CODES
Output pin
configuration
Failure mode
Start up
On
Off
Comment
Digital out
HS+LS
Broken wire
open
load*
open
load
*with multiple low sides, open
load while on is detected only
when combined load is
showing undercurrent
Short to GND
(HS)
overload
overload
Short to GND
(LS)
-
overload
Short to Battery
(HS)
(no
contact)
*
-
Prevents module startup =>
LED showing Stopped,
Critical
*SCB while on can be
detected as undercurrent
(open load) in configurations
with one low-side
Short to Battery
(LS)
(no
contact)
overload
-
Prevents module startup =>
LED showing Stopped,
Critical
a
/
n
d
a
o
lr
e
v
o
d
a
o
lr
e
v
O
Under current
open
load
n/a
Digital out
HS
Broken wire
open
load
open
load
Short to GND
(HS)
critical
error
overload
-
Short to Battery
(HS) coil
energized
(no
contact)
*
open
load
Prevents module startup =>
LED showing Stopped,
Critical
*SCB while on can be
detected as undercurrent
(open load)
a
/
n
d
a
o
lr
e
v
o
d
a
o
lr
e
v
O
Under current
open
load
n/a
See under current threshold.
Can be disabled in
IQANdesign
PWM out
HS
Broken wire
-
open
load
Short to GND
(HS)
-
Short to Battery
(HS) coil
energized
(no
contact)
-
open
load
Prevents module startup =>
LED showing Stopped,
Critical
l
a
m
r
e
h
t
r
e
v
ir
d
r
e
w
o
P
a
/
n
d
a
o
lr
e
v
o
d
a
o
lr
e
v
O
protection shut down
a. Only the resulting status from the test expected to find the errror first is listed, different status is
possible as several failure modes are detected by multiple test.
Failures not detected by in this state are indicated with -
Expected channel status
a
