Conair TrueBlend SB-4, Руководство пользователя, Страница: 155 / 168

Tr o u b l e s h o o t i n g l 6 - 5
B a s i c A l a r m s
Alarm
Message:
Batch Hopper is not dump-
ing.
Batch Hopper cannot run in
Gravimetric mode.
Hopper hardware failure.
Mixer door is open.
Component hopper out of
material.
Possible Cause
Batch weigh hopper exit gate is not
opening and closing properly, and all the
material is not allowed to exit. Mixer
proximity switch is not operating, leav-
ing no room for material to fully exit the
batch weigh hopper. Mechanical inter-
ference with the batch weigh hopper, is
preventing the weight of the hopper to
detect as empty.
The batch hopper weight is unstable and
cannot weigh properly. May be caused
by mechanical interference of batch
weigh hopper, or excessive machine
vibration.
The load cell or the load cell input
PLC Slice is bad.
Occurs when the mixer door interlock
is broken, door is opened.
Occurs if the component hopper does
not dose any material.
Solution
Ensure the batch hopper exit gate fully
opens and closes properly. Test and
adjust mixer proximity switch, so the
material from the batch weigh hopper
is allowed to drain fully into the mixer.
Eliminate all mechanical interference
with batch weigh hopper. In
Setup/Component/Advanced, the
parameter ‘Hopper empty weight toler-
ance’ default value is set too low.
Eliminate mechanical interference or
vibration first. Next, verify the empty
weight displayed for the batch hopper
is stable. Look at “Delta Grams” value
under Setup/ Diagnostics/ Batch
Hopper. This is the amount of weight
variation the computer sees. Edit the
setup value under Setup/Batch Hopper/
Advanced, called “Unstable Weight
Tolerance”. Increase this value slightly
to make the alarm go away.
Calibrate the hopper. A zero value
near 2,000,000 should also show up
during the Zero part of the calibration.
If a value greater than 8,388,608 is dis-
played during the weight part of the
calibration, replace the load cell.
Close and ‘make’ the door interlock.
Occurs in conjunction with Mixer Door
Open, as this breaks the 24vdc inter-
lock to the PLC Input Slice.
Check the component hopper to be
sure material is present. Correct com-
ponent hopper loading problem.
6
T
roubleshooting
(Continued)