Yaskawa G5HHP Drive User Manual
Page 317
9.1 Protective and Diagnostic Functions
9 - 7
Corrective Actions
Probable causes
Meaning
Minor fault display
Excessive Speed Deviation
The load is too large.
Reduce the load.
DEV (blinking)
The speed deviation has been greater
than the setting in F1-10 for longer
than the setting in F1-11.
The acceleration time and deceleration
time are too short.
Lengthen the acceleration time and
deceleration time.
(
g)
Speed Deviation
than the setting in F1-11.
The load is locked.
Check the mechanical system.
The settings in F1-10 and F1-11 aren’t
appropriate.
Check the settings in F1-10 and F1-11.
UV4
PU Undervolt
PU Control Circuit Undervoltage
Module control power supply dropped
during operation.
400-V class: Detected only for
400 kW or larger Inverters.
575-V class: Detected only for
600 kW or larger Inverters.
---
S
Check wirings on the power supply
side.
S
Improve the power supply voltage.
UNBC
Unbalance Cur
Unbalanced Current
The output current for each Modulle
became unbalanced.
400-V class: Detected only for
400 kW or larger Inverters.
575-V class: Detected only for
600 kW or larger Inverters.
---
Check wirings.
OH4
Conv Ovr tmp
Converter overheating
The converter fin temperature became
higher than 105 °C.
400-V class: Detected only for
400 kW or larger Inverters.
575-V class: Detected only for
600 kW or larger Inverters.
---
Check the fin and ambient tempera-
tures.
EF3 (blinking)
External Fault 3
External fault (Input terminal 11)
EF4 (blinking)
External fault (Input terminal 12)
S
Reset external fault inputs to the
lti f
ti
i
t
EF5 (blinking)
External fault (Input terminal 13)
An “external fault” was input from a
multi-function input.
p
multi-function inputs.
S
Remove the cause of the external
EF6 (blinking)
External fault (Input terminal 14)
multi-function input.
S
Remove the cause of the external
fault.
EF7 (blinking)
External fault (Input terminal 15)
EF8 (blinking)
External fault (Input terminal 16)
CE
MEMOBUS Com Err
Communications Error
Normal reception was not possible for
2 s after received control data.
----
Check the communications devices
and signals.
BUS
Option Com Err
Option Card Transmission Error
A communications error occurred in a
mode where the run command or a
frequency reference is set from an
Transmission Option Card.
----
Check the Transmission Card and sig-
nals.
CALL
Serial Com Call
SI-B Communications Error
Control data was not normally re-
ceived when power was turned ON.
----
Check the communications devices
and signals.
E-15
Si-F/G Com Err
SI-F/G Communications Error De-
tected
A communications error occurred in a
mode where run or a frequency refer-
ence is set from an Transmission Op-
tion Card and E-15 is set to continue
operation.
----
Check the communications signals.
EF0
Opt External Flt
DDS/SI-B External Error Detected
An external error ware received from
an Option Card when EF0 was set to
continue operation.
----
Remove the cause of the external er-
ror.
9