Temperature & Humidity
Drive operating temperature range: -20°C to 55°C
Drive storage temperature range: -40°C to 85°C
Humidity: Maximum Relative Humidity 95%
Pre-operation Checks
Check the drive carefully before use it. Make sure
that all the wires are correctly and tightly
connected. Improper operation may cause fire or
injury to persons.
Power On/Off
The drive should use rated AC power supply: 50/60Hz,
517-625V on EV20XXM-LX-XXX models.
Use of incorrect power supply may damage the drive.
The user should make sure that the correct
combination of a power supply, drive, and accessories
are used.
When powering off the drive, make sure to wait for at
least 60 seconds to ensure that the drive is completely
turned off.
Communication Setting
The drive is designed to be used in a master-slave
configuration where the master is a system controller.
Standard Modbus protocol RTU is available.
Users can also change the slave ID, baud rate, parity
and stop bit method. Detailed parameters and default
values are in the Modbus Map (refer to
Addendum
).
Modbus uses a three-layer protocol – physical, data
link, and application. Refer to
Addendum
for additional
details.
Input Voltage and Input Current
The drives are designed for rated AC power supply:
50/60Hz, 517-625V on EV20XXM-LX-XXX drive
models. Published performance of the drive and
compressor combination will have a performance
tolerance specified on the compressor performance
data sheet when the Drive input voltage is in the
specified range as above.
Dynamic DC Bus Voltage Control by Buck
The drive has dynamic DC bus voltage control function,
which is capable of improving efficiency.
Speed Control
The frequency range of EV2 is from 15Hz to 120Hz. If
the frequency set by system controller is less than
15Hz but not zero, then the compressor will work at
15Hz. Similarly, if the frequency set by system
controller is greater than 120Hz, then the compressor
will work at 120Hz.
Start-up
Refer to
Addendum
for start-up procedures and
requirements.
Shutdown
Refer to
Addendum
for shutdown procedures and
requirements.
Fault Clearing
In the Modbus relationship, the drive is considered a
slave, and the system controller is the master. Faults
will not clear unless they are commanded to.
To clear faults, use the following method:
1. The compressor has been shut down for at least
35 seconds.
2. The fault condition no longer exists (registers 78-
85).
3. The drive has received a zero speed command
(register 101 = 0).
4. The drive has been disabled (register 100 = 0).
5. Write '1' to register 103.
Faults will not clear unless all items above are true.
Lockout Faults
There are specific faults that will cause the drive to
'lockout' after 10 consecutive occurrences. These
faults are noted in the
Addendum
. These faults will not
clear unless the power to the drive is fully cycled.
Stator Heat Control
In actual use, the system controller may decide
whether to preheat or not according to the
environment. When preheating is needed, the system
controller sends register 100 a compressor enable
command and register 102 a stator heating power
value. The drive transmits up to 50W DC power to
warm-up the compressor.
The stator heating is ON if the followings are true:
1. There are no active errors.
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