Magnetek DSD 412, Technical Manual

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DRIVE FAULTS
97
ERROR/FAULT CODE PROBABLE CAUSE/ — CORRECTIVE ACTION
F935 Calibration of bus voltage and armature voltage feedback circuits
do not match.
Probable causes:
Missing wire to bus or armature voltage feedback circuits.
Component problem - Feedback voltage divider ratios do not match.
*may occur during Self-Tune (Fctn #997) or Self-Diagnostic (Fctn
#998).
F936 E-Stop contact was opened during test. Test data is not valid.
Jumper E-Stop circuit and re-test.
*may occur during Self-Tune (Fctn #997) or Self-Diagnostic (Fctn
#998).
F937 Low read-back volts from motor armature circuit.
Probable Causes:
Missing wire to armature voltage feedback at A2TB5-1 & A2TB1-2.
Component problem – Feedback voltage divider ratio does not match
that identified in Cube ID PCB.
*may occur during Self-Tune (Fctn #997) or Self-Diagnostic (Fctn
#998).
F938 Low read-back volts from DC bus circuit.
Probable Causes:
Missing wire to bus voltage feedback. (Discrete wires on drives larger
than 300 amps DC.)
Component problem – Feedback voltage divider ratio does not match
that identified in Cube ID PCB.
*may occur during Self-Tune (Fctn #997) or Self-Diagnostic (Fctn
#998).
F939 Faulty Field Control Hardware.
Probable Causes:
Component problem – Replace Field Interface Board.
If fault is still present replace the Main Control Board.
*may only occur during power-up.
F940 Field Current Feedback A/D Saturated
Field A/D reading is saturated for more than 15 seconds.Probable
Causes:
Component problem – Replace Field Interface Board.
If fault is still present replace the Main Control Board.
941 MOTOR THEMOSTAT FAULT ---
Indicates that the drive has sensed
that the motor thermostat is open at A4TB3(2) to A4TB3(8).
A motor thermostat fault does not automatically shut down the drive,
but is annunciated via the ALARM relay output K2. See #182
Causes:
If the point is closed but the fault is still present replace the power
supply.
Table 13: Fault Code Descriptions