Conair TrueBlend TB500-4, User Manual

Page: 114 / 150

Alarm Messages and
Troubleshooting
TrueBlend ™
112 Edition: February 2007
Alarm Message Possible Cause Solution
OK:
Batch is stopped after confir-
mation and unit is stopped.
Alarm message is sent.
•
Tare wrong
-
The range that can
normally be com-
pensated is -50 to
100 g. If the tare
value is outside this
range it will alarm
When the unit starts a new
batch check the operation of
the weigh bin.
•
Make sure the bin is
empty.
•
Perform a zero calibra-
tion.
•
Make sure the material
sensor is adjusted cor-
rectly (see Section 9.6).
Alarm message "Tare wrong"
Meaning of alarm Correction
•
The weigh bin is still full of material.
•
The weigh bin is mechanically jammed.
•
The plunger was not correctly installed and is
pressed into the weigh bin.
•
"No slave" error occurred first, therefore the scale
value remains at the last valid value.
•
The operating air pressure is too low –-> weigh bin
closes too slowly.
•
Choke check valve for closing the weigh bin is in-
correctly adjusted –-> weigh bin closes too slowly.
Î Check why material is not
discharged (cone, weigh
bin).
Î Check CAN connection
(see No slave).
Î Check operating pressure
and if necessary adjust
(min. 6 bar).
Î Adjust choke check valve
correctly.