Frequently Asked Questions - Emerson EV3 Series Application Manuallines

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Frequently asked questions

Table 20 provides answers to frequently asked questions. Please check here first in case of problems
with the installation and assembly. In case further assistance is needed please contact the
Application Engineering department at Emerson.
No. Question / Drive behaviour
The drive is connected to the grid, but the
1
compressor will not start
The compressor is not spinning, but there is a
2
strange noise coming out of it.
The compressor is spinning, but it is making a
3
lot of noise.
The drive is connected to the grid, but there is
4 no communication between the drive and the
controller.
The drive is connected to the grid, there is no
5 communication with the drive, and the LEDs are
not turned on.
Drive configuration parameters were wrongly
2 introduced, but after a power cycle, faults
regarding wrong configuration are not cleared.
Why has the DLT sensor short/open fault been
3
triggered?
The drive ignores the speed command from the
controller
4
• Alert message: Input current SDP,
compressor...
Unable to clear a fault message via "Clear
5
Fault" command.
The drive does not provide the expected power.
• Alert message: Input current SDP,
6
compressor...
Which kind of plug-in is the counterpart of the
7
control terminal?
What happens in case of a communication loss
8
between drive and controller?
The fault LED does not blink, but the drive is not
9
communicating.
Table 20: Frequently asked questions (FAQ's)
AGL_Sol_EV3_E_Rev_01
Corrective action
Check the Fault LED from the top of the drive.
If the LED blinks, then a fault has been
triggered.
Check if the drive is in Stator Heating Mode.
In this mode, the drive only applies DC current
to the stator of the motor.
Check if the compressor is spinning in the
right direction. If not, interchange two phases
from drive to motor and try again.
• Check if the control terminal is properly
introduced in the socket.
• Check if the wiring is properly done, refer to
chapter 3.4.6.
• Check the settings of the COM port in
device manager.
Try reflating the drive. If it does not work, then
the drive is damaged and has to be replaced.
The drive remembers the configuration based
on registers [201]- [213] after a power cycle.
In order for the faults to be cleared, the right
parameters must be introduced.
If the DLT sensor has been enabled, and
nothing is connected to the communication
terminal, on the positions of the sensors (DLT:
pins 1 & 2), then a fault will trigger.
The drive is running in the Speed-Drop-
Protection mode. In this mode, the drive takes
over the speed control.
• The root cause of the fault is still there!
• The compressor speed demand as well as
the compressor ON/OFF command must be
set to 0 before sending a "Clear Fault"
command to the drive.
• Fault messages can only be cleared after a
minimum time delay of 30 seconds after the
failure disappeared.
The drive is most likely running in the Speed-
Drop Protection mode:
• Check the root cause of SDP in register
[200].
• Check the system and drive ambient
temperatures.
• Check the drive cooling.
• JITE Technologies (www.jite.com).
Type of connector: PTB750B-00-1-09-3
After 30 sec the drive will let the compressor
trip. The protection will remain for 30 seconds
before the failure can be cleared by a "Clear
Fault" command.
Check the connection between the
communication terminal and the case
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