Specifications

Chapter 7 Trouble shooting
- 138 -
◆ Unstable rotation
Driver failure
N
Is voltage of
driver’s UVW
correct?
N
Is phase
order
correct?
Correct them.
Y
Y
Actuator failure
Form A of prior page From B of prior page
N
Loose
screws in
connection,
broken wire?
Verify motor cable
connection.
N
Is phase
order
correct?
Correct them.
Y
N
No layer
short,
grounding
in motor?
Y
Y
Actuator failure
Is output
shaft
locking?
Y
Release
locking.
N
Actuator failure
Supply
voltage
correct?
To next page
Input c
orrect
voltage.
N
Is voltage
within its
allowance?
Review transformer
and other power
capacities
Y
N
Y
Start
Is
temperature
normal in
cabinet?
Review heat generating devices
and the cooling system.
N
Y