GSI Outdoors PNEG-630 - Manual (Page 64)

Portable Dryer Troubleshooting
63
Out Of Grain Warning
• This message indicated that the dryer has
run low on grain. The shutdown occurs
when the loading equipment has run
longer than the time the operator has set on
the Out of Grain timer. The mercury
switch located on top of the dryer tells the
computer when the dryer is full or calling
for grain. The shutdown usually occurs
when the loading equipment is having
trouble keeping up with the output of the
dryer.
Possible Solution
• Look at the loading equipment to see if this
is the problem. Remember, the top hopper
of the dryer should always have grain in it.
If any of the side screens are opening up at
anytime, then you are losing heat along
with efficiency. This indicates that you are
not filling fast enough. Speed up the
loading equipment to the dryer.
• Using J5-11 for the test point ground, test
for 12 volts on J5-4 to test the load mercury
switch. This switch should have 12 volts DC
on it when the dryer is calling for grain and has
zero volts on it when thedryer is full.
Out of Grain Hints
1. The out of grain timer is only in use when
the fill switch is in the auto position. In
the manual position the top mercury
switch will still shut off the fill auger, but
the dryer will not shutdown if the source
of grain to the fill auger is depleted.
Troubleshooting Tips
Out Of Grain Warning Shutdown 2. Before setting the Out of Grain timer,
monitor how long it takes the dryer to
refill for shrink. Then, set the Out of
Grain timer accordingly. Example: If a
dryer takes six minutes to refill for
shrink, add an additional five minutes to
this, and use this as the amount of time to
program into the Out of Grain timer. The
additional five minutes is to avoid any
nuisance shutdowns. A lot of customers
don't want their fill augers to run empty if
the source of grain runs out. They may
want to set the Out of Grain timer closer
than the additional five minutes. (this is
fine, but caution the customer that it may
cause some nuisance shutdowns.)
3. For the Out of Grain warning to work
properly, the fill equipment must be large
enough to handle the capacity of the
dryer. You do not want the side columns
to get low on grain. This will allow the
airflow to escape from the dryer through
the side screens. If this happens you lose
efficiency and may start having a loss of
airflow shutdown.