200
E300 Installation Guide
Issue Number: 1
OHt dc bus
DC bus over temperature
27
OHt DC bus trip indicates a DC bus component over temperature based on the software thermal model. The drive includes
a thermal protection system to protect the DC bus components within the drive, this includes the effects of the output
current and DC bus ripple. The estimated temperature is displayed as a percentage of the trip level in parameter
Percentage Of DC Link Thermal Trip Level
(
J78
). If this parameter reaches 100 % then an
OHt DC bus
trip is initiated. The
drive will attempt to stop the motor before tripping. If the motor does not stop in 10 seconds the drive trips immediately.
Recommended actions:
•
Check the AC power supply voltage level
•
Check the AC power supply voltage balance
•
Check the DC bus voltage ripple level
•
Reduce motor loading
•
Check the output current stability and if unstable;
•
Check the motor map settings within the drive (parameters
B06
,
B02
,
B07
,
B03
,
B04
,
B05
), all modes
•
Slip Compensation Enable
(
B10
), (Open loop)
•
Select fixed boost mode, parameter
B09
(Open loop)
•
Disconnect load and complete a rotating autotune,
Motor Autotune
(
B11
)
•
Autotune the rated speed, parameter
B07
(Open loop) parameter
B25
(RFC-A)
•
Reduce the speed loop gains, parameters
I01
,
I02
,
I06
and
I07
run and stop (Closed loop operation)
•
Add a speed feedback filter parameter
C09
(Closed loop operation)
•
Add a current demand filter, parameters
I05
,
I10
run and stop
•
Check position feedback signals for noise with an oscilloscope (Closed loop operation)
•
Check encoder mechanical coupling (Closed loop operation)
•
Reduce duty cycle
OHt Inverter
Inverter over temperature based on thermal model
21
OHt Inverter trip indicates an IGBT junction over-temperature has been detected based on the software thermal model.
Recommended actions:
•
Check AC power supply input phases present and balanced
•
Check DC bus ripple
•
Check for motor instability
•
Reduce acceleration / deceleration rates
•
Reduce the maximum operating switching frequency
•
Reduce motor load
•
Reduce duty cycle
OHt Power
Power stage over temperature
22
OHt Power trip indicates that a power stage over-temperature has been detected. From the sub-trip ‘xxyzz’, the thermistor
location is identified by ‘zz’.
Recommended actions:
•
Check enclosure / drive fans are still functioning correctly
•
Check enclosure ventilation paths, door filters
•
Check correct drive size for the application, load correct
•
Force heatsink cooling fans to run at maximum speed
•
Increase enclosure ventilation
•
Decrease acceleration / deceleration rates
•
Reduce motor load
•
Reduce duty cycle
•
Reduce the drive switching frequency
•
Use a drive with larger current / power rating
This is a delayed trip, where travel will complete (
Elevator Software State
(
J03
) = 0) and then the drive will trip. If a delayed
trip has been scheduled during travel (
Elevator Software State
(
J03
)
>
0) then
Global Warning
(
L04
) = On (1) indicating
that there is a delayed trip scheduled to occur when travel completes.
Trip
Diagnosis
Source
xx
y
zz
Description
Control system
00
2
00
DC bus thermal model gives trip with sub-trip 0
Source
xx
y
zz
Description
Control system
00
1
00
Inverter thermal model gives (OHt Inverter) trip with sub-trip 0
Source
xx
y
zz
Description
Power system
01
0
zz
Thermistor location in the drive defined by zz
Summary of Contents for E300 Series
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