Yokogawa µR20000 - Manual (Page 11)

2-1 SM 04P02B01-01E
Troubleshooting
2
2.1 Failure Analysis and Repair Procedures
This section describes failure analysis and repair procedures.
Failure Analysis Procedures
1. Determine the type of problem.
2. Check for possible user error. Check the connections and the settings of
equipment to determine whether there was a handling mistake.
3. Execute the self diagnostic test by turning the power ON, and identify any
problem items.
4. Analyze the cause of the problem according to the troubleshooting flow chart.
WARNING
Do not touch the circuit or parts with live voltage because the power unit
contains a high-voltage electrical circuit. The power unit is furnished with a
dedicated cover to prevent electric shock. Do not remove this cover. Never
touch any part not subject to adjustment.
CAUTION
Make sure to connect input terminals (voltage or current) correctly. The internal
circuit may be damaged when wrongly connected.
Flow Chart
This flow chart consists of general service operations when a fault occurs. This chart is
not always suitable for every kind of fault. However, it is recommended to perform
operations according to the flow chart.
START
END
YES
YES
NO
NO
Phenomenon check
Cause check
Assembly exchange and
adjustment
Performance test execution
Repaired?
Chapter 2 Troubleshooting