FEC MICRO NR - Manual (Page 117)

FEC Micro Nutrunner Operations Manual Chapter 9: Troubleshooting (Rev. 2: 02/12)
Page 9-15
9.10 Micro-NR MNR Unit Fastening Faults and Causes
REFER TO SECTION “6.2 Monitoring Functions” for detailed descriptions of Fastening
Faults and causes related to all monitoring functions.
9.10.1 Accept Conditions
An “ACC” (Accept) will be displayed in the DATA area of the front programming/display and the
multi-function LED will light “green” for the three following reasons:
1. The RESET input is active on either the display/programming unit or via a PLC input and
the reset condition (ZERO LEVEL) of the TRANSDUCER is within acceptable limits.
2. The CAL input is active on either the display/programming unit or via a PLC input and the
calibration condition (CAL LEVEL) of the transducer is within acceptable limits.
3. The previous fastening was completed within all preset limits (TORQUE, ANGLE, 1st
RATE, 2nd RATE, 3
rd
RATE and TIME).
9.10.2 Reject Conditions
An “rEJ” (Reject) will be displayed in the DATA area of the front programming/display and the
multi-function LED will light “red” for the three following reasons:
1. The RESET input is active on either the display/programming unit or via a PLC input, and
the reset condition (ZERO LEVEL) of the TRANSDUCER is not within acceptable limits.
2. The CAL input is active on either the display/programming unit or via a PLC input and the
calibration condition (CAL LEVEL) of the transducer is not within acceptable limits.
3. The final fastening torque is not between the low and high Torque limits, low and high angle
limits or the Fastening Time limits set in the parameter presets.
The Reject LED will blink for the following reasons:
1. Flashes fast indicating an Angle reject. (on 100 msec – off 300 msec)
2. Flashes slow indicating a Time reject. (on 100 msec – off 700 msec)