SEQUENCE
ANALYSIS
19
01/01/2016
6.
Sequence:
Unload
operation
switch
(SW6)
to
"ON",
energizing
unload
circuit.
Action:
Unload
switch
(SW6)
"ON",
switch
unload
light
“ON”,
starts
unload
auger
and
dry
auxiliary
unloading.
Symptoms:
A.
No
switch
unload
light.
B.
Switch
unload
light
“ON”
but
unloading
system
not
running.
C.
Dryer
shuts
down
immediately
or
during
unloading
operation.
Possible
Causes:
A.
Defective
grain
unloading
switch
contact
(SW6).
Defective
switch
unloading
light.
B1.
Defective
auxiliary
unload
starter
coil
(S8).
B2.
Defective
auxiliary
unload
starter
interlock
(AC7).
B3.
Defective
unload
auger
starter
coil
(S7).
C1.
Overload(s)
on
unload
auger
and/or
auxiliary
unload
starter(s)
(S7,
S8)
tripped.
Corrective
Action:
A.
If
voltage
is
present
on
terminal
#18
(120
volts),
turn
unload
switch
(SW6)
to
"ON".
Then
check
for
voltage
on
terminal
#44.
If
voltage
is
not
present
the
unload
switch
(SW6)
is
defective,
replace.
If
voltage
is
present,
the
switch
unload
light
is
defective,
replace.
B1.
If
auxiliary
unload
starter
(S8)
does
not
pull
in
and
voltage
is
present
at
load
side
of
coil,
the
holding
coil
is
defective,
replace.
B2.
If
auxiliary
unload
starter
(S8)
does
pull
in,
check
load
side
of
interlock
(AC7)
on
auxiliary
unload
starter
(S8)
for
presence
of
voltage
(120
volts).
If
voltage
is
present
at
load
side
of
interlock
(AC7),
check
opposite
side
of
interlock
(AC7).
If
no
voltage
is
present,
the
interlock
(AC7)
is
defective,
replace.
B3.
If
unload
auger
starter
(S7)
does
not
pull
in
and
voltage
is
present
at
load
side
of
coil,
the
holding
coil
is
defective,
replace.
C1.
Overloads
on
unload
auger
and/or
auxiliary
unload
starter(s)
(S7,
S8)
may
have
tripped
from
a
motor
drawing
high
amperage.
Determine
which
one
is
open.
Reset
defective
overload.
It
will
be
necessary
to
determine
if
a
short
circuit
or
excessive
overload
condition
exists
in
this
isolated
system
and
67
Summary of Contents for DP
Page 1: ...Operation Manual 2016 MODELS MSF DP DPSL DPXSL DPX4T DPX8T DPX12T DPX16GT Grain Dryer ...
Page 2: ......
Page 4: ...2 ...
Page 6: ...GENERAL 2 01 01 2016 Dryer Labels Location 4 ...
Page 7: ...GENERAL 3 01 01 2016 5 ...
Page 14: ...12 ...
Page 24: ...STARTUP 10 01 01 2016 Alarm Limit Indication Error Messages 22 ...
Page 25: ...STARTUP 11 01 01 2016 23 ...
Page 26: ...STARTUP 12 01 01 2016 24 ...
Page 32: ...STARTUP 18 01 01 2016 GRAIN SHRINKAGE TABLE SHRINKAGE WHEN GRAIN IS DRIED TO THESE LEVELS 30 ...
Page 46: ...STARTUP 32 01 01 2016 Alarm Limit Indication Error Messages 44 ...
Page 47: ...STARTUP 33 01 01 2016 45 ...
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