Installation Manual

Troubleshooting 8-139
8.5.3 Scale Fault Isolation Procedure
The Scale Fault Isolation Procedure consists of the following:
• Mechanical Verification
• Scale Operational Verification
• Scale Power Verification
• Scale Communications Verification
Before troubleshooting a problem, please familiarize yourself with the important information provided in
the Safety section of this manual.
WARNING! A dispensing system in need of component troubleshooting may have high
voltage present in both designated and unsuspected places that can result in
personal injury or death. Follow safety precautions listed in the Safety section of
this manual.
WARNING! Disconnect and lock out power to adjacent systems connected to the dispensing
system (such as loaders and ovens) before troubleshooting. Failure to do so may
result in serious personal injury or death.
CAUTION! Troubleshooting should only be performed by an Asymtek Field Service Engineer
or an Asymtek-trained service technician.
If the Scale is malfunctioning or exhibiting erroneous readings, refer to Table 8-41 for a summary of the
symptoms, probable causes, and fault elimination and isolation
Table 8-41 Scale Troubleshooting
Symptom Possible Cause Fault Isolation
Scale Power Verification
Scale fails to
initialize
No power at Scale interface; loose
Connections, defective Com Cable;COM1
port
Scale Communications Verification
Mechanical Verification
Scale will not
Zero
Vibration, Filter settings, Scale not level,
Read Scale Delay adjustment, air
currents
Scale Operational Verification
Scale inaccurate
measurements
Scale calibration, Scale not level, air
currents, Read Scale Delay adjustment
Scale Operational Verification
Scale reading
always 0.00
Scale or Scale Interconnect Cable
problems
Scale Operational Verification