Electro-Craft MAX-430 - Malfunction Diagnosis

Diagnostics/Troubleshooting 4-3
Instruction Manual
Malfunction Diagnosis
T
ABLE
4.1
MAX-430 System Problem Symptoms and Possible Causes
Symptoms Possible Causes
Motor inoperative. No AC power to the drive
Fault
y
wirin
g
to motor
No ± 15 VDC at P2. Power suppl
y
defective
± 15 VDC re
g
ulators defective
No volta
g
e between MT+, MT- terminals. INH clamp activated
Defective drive
Motor responds to commands onl
y
in one direction. FAC or RAC clamp activated
Defective output sta
g
e or drive board
Volta
g
e measured between motor terminals but
motor does not rotate.
Motor or load mechanicall
y
j
ammed
Motor brushes worn or improperl
y
seated
Open motor windin
g
Motor runs onl
y
at a hi
g
h constant speed. Fault
y
wirin
g
to the tachometer
Tachometer brushes worn or improperl
y
seated
Open tachometer windin
g
Tachometer leads reversed
TACH
g
ain full
y
CCW - See pa
g
e 3-2.
Velocit
y
Clamp
j
umpered - See pa
g
e 2-12.
Bus Overvolta
g
e Shunt fuse
(
F1
)
blown