Veichi JT550 Series Manual page 106

Chapter 7 Maintenance and Troubleshooting
When motor running current reaches 175% of rated motor current and motor runs at this level for 2
minutes, Err11 (motor overload) is detected. When motor running current reaches 115% of rated motor
current and motor runs at this level for 80 minutes, Err11 is detected.
Suppose that rated motor current is 100 A.
F9.01 = 1.00: According to the Figure , when motor running current reaches 125 A (125% of
●
100 A) and motor runs at 125 A for 40 minutes, Err11 is detected.
F9-01 = 1.20: According to the Figure, when motor running current reaches 125 A (125% of
●
100 A) and motor runs at 125 A for 40 x 1.2 = 48 minutes,Err11 is detected.
F9.02 Motor overload warning coefficient
The AC drive has the motor overload pending function that reminds of motor overload in advance
through digital output function 6.On the condition that F9.01 = 1.00 and F9.02 = 80%, when motor running
current reaches 145% of rated motor current and motor runs at this level for 80% * 6 = 4.8 minutes, DO
terminal or fault relay outputs the motor overload pending signal.
When F9.02 = 100%, the motor overload pending and the motor overload protection are performed
simultaneously.
F9.07 Short-circuit to ground upon power-on
0: Disabled
1: Enabled
It is used to determine whether to check the motor is short-circuited to ground at power-on of the
inverter. If this function is enabled, the inverter's UVW will have voltage output a while after power-on.
F9.09
This function parameter sets permissible times of auto fault reset. If reset times exceed the value set in
this parameter, the inverter will keep fault status.
Undervoltage (Err09) is reset automatically when bus voltage recovers to normal. It is not included in
auto reset times.
Short-circuit to ground (Err23) cannot be reset automatically or manually. It can only be reset after
power down.
F9.10
0: Not act
1: Act
This function parameter decides whether digital output terminal set for fault output acts during the
fault reset.
F9.11
It is used to set the waiting time from the alarm of the inverter to fault auto reset.
Input phase loss protection/contactor
F9.12
Unit's digit: Input phase loss protection
Ten's digit: Contactor energizing protection
0: Disabled
1: Enabled
It is used to determine whether to perform input phase loss or contactor energizing protection.When
F9.12 = 1, only the three-phase 380V, 018G and above models have the fault.
F9.13 Output phase loss protection selection
It is used to determine whether to perform output phase loss protection.
0: Disabled
1: Enabled
Fault auto reset times
Selection of DO action
during auto reset
Time interval of fault auto reset
energizing protection selection
Range:50~100
Range:0~1
Range:0~20
Range:0~1
Range:0.1s~100.0s
Range:0~11
Range:0~1
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JT550 Series Inverter Manual
Default:80%
Default:1
Default:0
Default:0
Default:1.0s
Default:10
Default:1