Nidec Digistart D4 User Manual

Troubleshooting
Display
Possible cause/Suggested solution
Excess start time
Excess start time trip can occur in the following conditions:
• parameter 1B Motor Full Load Current is not appropriate for the
motor
• parameter 2D Current Limit has been set too low
• parameter 2B Start Ramp Time has been set greater than the
setting for 5G Excess Start Time
• parameter 2B Start Ramp Time is set too short for a high inertia
load when using Adaptive Control
Related parameters: 1B, 2B, 2D, 3D, 3F
Firing Fail Px
Where 'X' is phase 1, 2 or 3.
The SCR did not fire as expected. The SCR may be faulty or there
may be an internal wiring fault.
Related parameters: None
Flow Sensor
The smart card has detected a fault with the flow sensor.
Related parameters: 30E, 36B
Flow Switch
The flow switch sensor (smart card terminals C23, C24) has closed.
Related parameters: 30E, 36H
Frequency
This trip is not adjustable.
The mains frequency has gone beyond the specified range.
Check for other equipment in the area that could be affecting the
mains supply, particularly variable speed drives and switch mode
power supplies (SMPS).
If the soft starter is connected to a generator set supply, the
generator may be too small or could have a speed regulation
problem.
Related parameters: 6K
Heatsink
overtemperature
• Check that bypass contactors are operating.
• Check that cooling fans are operating (if fitted).
• If mounted in an enclosure, check if ventilation is adequate.
• The soft starter must be mounted vertically.
Related parameters: None
High Flow
The flow sensor connected to the smart card has activated high flow
protection.
Related parameters: 30E, 30G, 30H, 31A, 31C, 31D, 36F
High Pressure
The pressure sensor connected to the smart card has activated high
pressure protection.
Related parameters: 30A, 30C, 30D, 32A, 32B, 32C, 36D
Input A trip
Input B trip
The soft starter's programmable input is set to a trip function and has
activated. Resolve the trigger condition.
Related parameters: 7A, 7B, 7C, 7D, 7E, 7F, 7G, 7H
Instantaneous
overcurrent
This trip is not adjustable.
The current on all three phases has exceeded 7.2 times the value of
parameter 1B Motor Full Load Current.
Causes can include a locked rotor condition or an electrical fault in
the motor or cabling.
Related parameters: None
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Nidec Digistart D4 Specifications

General

Brand	Nidec
Model	Digistart D4
Category	Controller
Language	English