TECO-Westinghouse F510 Series, Instruction Manual

Page: 407 / 444

10-9
LED display Description Cause Possible solutions
bb6
(flash)
External
baseblock
External base block
(Terminal S6)

Multifunction digital input
external baseblock active.

Multi-function input
function set incorrectly.

Check wiring
OL1
Motor overload
Internal motor overload
protection tripped, active
when protection curve 08-05
= xxx1.

Voltage setting V/F mode
too high, resulting in
over-excitation of the motor.

Motor rated current (02-01)
set incorrectly.

Load too heavy.

Voltage setting V/F mode
too high, resulting in
over-excitation of the motor.

Inverter rating too small.

Load too heavy.

Check V/f curve.

Check motor rated current

Check and reduce motor
load, check and operation
duty cycle.

Check V/f curve.

Replace inverter with
larger rating.

Check and reduce motor
load, check and operation
duty cycle
OL2
Inverter overload
Inverter thermal overload
protection tripped.
If an inverter overload occurs
4 times in five minutes, it is
required to wait 4 minutes
before resetting the fault
CE
(flash)
communication
error
No Modbus communication
received for 2 sec.
Active when 09-07=3.

Connection lost or wire
broken.

Host stopped
communicating.

Check connection

Check host computer /
software.
CLB
over current
protection
level B
Inverter current reaches the
current protection level B.

Inverter current too high.

Load too heavy.

Check load and duty cycle
operation.
Retry
(flash)
retry
Automatic reset has
activated, and it displays
before the period of 07-01
automatic reset terminates.

The period of 07-01
automatic
reset≠0.

The times of 07-02
automatic
reset≠0.

It will disappear after the
period of automatic reset.
EF1
( flash )
External fault
(S1)
External fault (Terminal S1)
Active when 03-00= 25 or 68,
and Inverter external fault
selection 08-24=2.

Multifunction digital input
external fault active and
parameter 08-24 = 2 for
operation to continue.

Multi-function input
function set incorrectly.

Check wiring

Multi-function input
function set incorrectly.

Check wiring
EF2
(flash)
External fault
(S2)
External fault (Terminal S2)
Active when 03-01= 25 or 68,
and Inverter external fault
selection 08-24=2.
EF3
(flash)
External fault
(S3)
External fault (Terminal S3)
Active when 03-02= 25 or 68,
and Inverter external fault
selection 08-24=2.