Self Diagnostics; Table 9-2 Power-Up Tests - Honeywell DR4500A Product Manual

Troubleshooting / Service

Self Diagnostics

9.3 Self Diagnostics
Power-up tests
When the recorder is powered-up, four tests are run by the DR4500A software to ensure memory integrity.

As the tests are run, the displays appear as shown in Table 9-2.
RAM TEST
CONFTEST (configuration checksum)
CAL TEST (working calibration)
BATTERY*
*Battery test failure does not cause a failsafe.
Failsafe
If control is configured, and any test—except BATTERY—fails, "FAIL" appears momentarily in the

upper display, then a display test is run, after which the controller goes into manual mode and you will
see:
Upper Display: (PV value)
Lower Display: FAILSAFE (blinking)
Refer to "Device Status" (next page) to determine which tests have failed and how to correct them.

All applicable error messages are displayed in rotation. If "CONTROL" is not configured, FAILSAFE
will not display. CNFG ERR, CAL1 ERR, CAL2 ERR, or BATT LOW will display, whether
FAILSAFE does or not.
206 DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual

Table 9-2 Power-up tests

Lower Display Upper Display
PASS or FAIL
PASS or FAIL
PASS or FAIL
PASS or FAIL
Release L
February 2017