YASKAWA VS-606V7 Series - Page 174

8. Fault Diagnosis
173
Protective
Operation
Output is
turned OFF
and motor
coasts to a
stop.
OL1 (Motor overload)
Motor overload protection op-
erated by built-in electronic
thermal overload relay.
• Check the load size or V/f
pattern setting (constants
n011 to n017).
• Set the motor rated cur-
rent shown on the name-
plate in constant n036.
• Check that the settings of
motor protection (whether
motor cooling method is
self-cooled or fan-cooled)
and motor protection time
constant are made cor-
rectly.
• Check the load size, V/f
set value, operation pat-
tern, etc. to confirm that
the load is not excessive
under actual operation.
• Recheck the item of
motor protection and set
the constants again if
necessary.
• Refer to
 Reducing
Motor Noise or Leakage
Current Using Carrier
Frequency Selection
(n080) on page 83.
• Check the wiring
(increase of current
caused by rare shortcir-
cuit, etc.).
OL2 (Inverter overload)
Inverter overload protection
operated by built-in electron-
ic thermal overload relay.
• Check the load size or V/f
pattern setting (constants
n011 to n017).
• Check the Inverter capac-
ity.
• Check the load size, V/f
set value, operation pat-
tern, etc. to confirm that
the load is not excessive
under actual operation.
• Refer to
 Reducing
Motor Noise or Leakage
Current Using Carrier
Frequency Selection
(n080) on page 83.
• Check the wiring
(increase of current
caused by rare shortcir-
cuit, etc.).
Fault Display Inverter
Status
Description Causes and Corrective
Actions
Digital
Operator
RUN (Green)
ALARM (Red)