Troubleshooting And Maintenance; Troubleshooting - YOKOGAWA UM330 User Manual

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4.

Troubleshooting and Maintenance

4.1

Troubleshooting

I Troubleshooting Flow
If the operating display does not appear after turning on the indicator's power, try to solve
the problem by following the procedure below.
If the problem seems to be complex, contact the vendor from which you purchased the
instrument.
Is the instrument
defective?
Totally
inoperable?
Check wiring on the
power supply
terminals.
Check the supply
voltage.
Normal?
Ask the vendor for repair.
IMPORTANT
Take note of the parameter settings when asking the vendor for repair.
Yes
No Is key
operation
faulty?
Yes Yes
Check the key lock
setting.
No
No
Is
key lock
enabled?
Yes
Correct
errors.
No
Correct?
Yes Yes
Disable
key lock.
Find the cause.
<4. Troubleshooting and Maintenance>
No No
Is display
faulty? signal faulty?
Yes
Turn off power, and Check the
then turn it on instrument's I/O
again. specifications.
Check the specifications
of I/O counterpart for
wrong polarity.
Is
No
Is I/O
communication
link faulty?
Yes
Check the
instrument's suffix
code.
No
Does the code
include a communication
option?
Check the
No communication
communication-related
capability.
parameters.
Check
communication wiring.
Check the specifications
of communication
counterpart.
IM 05F01D02-41E 1st Edition : May 31,2000-00
4-1
Yes