NF BP4620, Instruction Manual

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6.1 Error Messages
BP4620
6-2
6.1 Error Messages
The BP4620 runs a self-diagnosis at power-on, and if an anomaly is detected, an error message is
displayed. An error message is also displayed when an incorrect setting or operation is performed.
The contents and cause of the error message, as well as the required handling, are listed below.
6.1.1 Error at power-on
The BP4620 performs the following fault diagnoses at power-on.
If an error occurs, “NG” is displayed on the system check screen.
Table 6-1 lists the diagnosis items and the required handlings in case of fault detection.
Table 6-1. Self-Diagnosis Errors
Fault Diagnosis Item Fault Contents Operation at Fault Detection & Required Handling
ROM CHECK ROM sum-check
Product failure may have occurred. Contact NF
Corporation or an NF Corporation sales
representative.
The operation stops at this point and the error remains
displayed until the power is switched off.
RAM READ/WRITE CHECK RAM read and write check
BACKUP MEMORY CHECK Backup memory sum-check
The BP4620 starts after memory initialization is
completed.
( Refer to “9. INITIAL SETTING LIST”.)
In such cases, the characteristics of the backup battery
may be degraded.
( Refer to “7.6 Backup Battery”.)
WAVE MEMORY CHECK Waveform memory sum-check
SEQUENCE MEMORY CHECK Sequence memory sum-check
VERSION CHECK Version number check
CALIBRATION MEMORY
CHECK Calibration value memory
sum-check
The BP4620 starts after calibration value memory
initialization has been completed.
In this case, the BP4620 starts up without calibration
values, and therefore the prescribed performance
cannot be obtained. Since there may be defective
parts, contact NF Corporation or an NF Corporation
sales representative.

Examples of screen displays in case of fault detection during self-diagnosis
ROM CHECK ........................................ OK
RAM READ/WRITE CHECK ................. OK
BACKUP MEMORY CHECK ............... OK
WAVE MEMORY CHECK .................... OK
SEQUENCE MEMORY CHECK ............ OK
CALIBRATION MEMORY CHECK ...... NG ….. INITIALIZED
VERSION CHECK ................................ NG ….. INITIALIZED