User Manual
EM303A General Purpose Inverter
41
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 power supply is correct
2. The input power supply connects to a circuit 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 to 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, normal display on control panel, no
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.
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