User Manual
EM303B General Purpose Inverter
49
5
Trial Operation
5.1
Trial Operation Procedures
Table 5-1 Procedures of Trial Operation
Procedure
Working Scope
Installation
Check inverter’s rated power, and install the inverter as per the requirements
stated in Chapter 2.
Wiring the Inverter
Wiring as per the requirements stated in Chapter 3.
Check Before Power-on
1.
Be sure the input voltage of power supply matches the rated voltage of
inverter.
2.
The input power supply circuit connects to a breaker
3.
The inverter is grounded.
4.
Power supply cable is connected to input terminals R, S and T of the
inverter correctly
5.
Motor is connected to output terminals U, V, and W of the inverter
correctly.
6.
Correct control circuit wiring.
7.
External switch is at right status.
8.
Motor is disconnected from the mechanical system when idling.
Check at Power-on
1.
Check if there is unexpected noise, odd smell, or smoke with inverter.
2.
When power is on, the keypad display is normal, no fault and alarming.
3.
Turn off the power immediately if any emergency, and check as per the
instruction in Chapter 9.
Parameter Setting
After the initial operation of inverter, maintenance or motor replaced, reset the
parameters as defaults, and then conduct following operations.
Input Correct Motor Nameplate
Parameter
Input and confirm the parameters listed on motor nameplate. Otherwise,
serious damage may occur in operation.
Setting Protection Parameter of
Motor and Inverter
Set correct limit parameters, protection parameters and protection modes of
inverter and motor, mainly as: maximum frequency, upper-limit frequency,
lower-limit frequency, lower-limit frequency running time, fault retry control,
relay fault output.
Autotuning Motor Parameter
1.
Obtain correct motor parameters by autotuning motor parameter before the
initial operation in selecting vector control mode.
2.
Use stationary autotuning motor parameter if motor cannot disconnect the
load.
3.
Do not autotune motor parameters if the motor is running.
Setting
Operation
Control
Parameter
General
Parameter
Set rotational direction, F/R control, acceleration/deceleration time, control
mode, star/stop mode, and input mode directly based on driving system
working conditions.
V/F Control
Set parameters of V/F curve scaling, torque boost, slip compensation, and
AVR function based on load needs.
Vector Control
Set parameter of regulator and torque control, and setting parameters based on
load conditions.
Idling Trial Operation Check
When motor is idling, start inverter in keypad or terminal control mode, check
and confirm the running status of drive system.
1.
Motor: stable operation, normal rotation, correct rotational direction, normal
acceleration/deceleration process, no unexpected vibration, noise or odd
smell.
2.
Inverter: correct data displayed on the control panel, fans and relays working