Nidec Digistart D4 User Manual

Troubleshooting
Display
Possible cause/Suggested solution
Internal fault x
Where 'X' is a number.
This trip is not adjustable.
The soft starter has tripped on an internal fault. Contact your local
supplier with the fault code (X).
Internal fault 88
The soft starter firmware does not match the hardware.
Keypad
disconnected
Parameter 1A Command Source is set to Remote Keypad but the
soft starter cannot detect a remote keypad.
If a remote keypad is installed, check the cable is firmly connected to
the soft starter.
If no remote keypad is installed, change the setting of parameter 1A.
Related parameters: 1A
L1 phase loss
L2 phase loss
L3 phase loss
This trip is not adjustable.
During pre-start checks the starter has detected a phase loss as
indicated.
In run state, the starter has detected that the current on the affected
phase has dropped below 10% of the programmed motor FLC for
more than 1 second, indicating that either the incoming phase or
connection to the motor has been lost.
Check the supply and the input and output connections at the starter
and at the motor end.
Related parameters: None
L1-T1 shorted
L2-T2 shorted
L3-T3 shorted
During pre-start checks the starter has detected a shorted SCR or a
short within the bypass contactor as indicated.
Related parameters: 6S
Low Control Volts
The soft starter has detected a drop in the internal control voltage.
• Check the external control supply (A1, A2, A3) and reset the
starter.
If the external control supply is stable:
• the 24 V supply on the main control PCB may be faulty; or
• the bypass driver PCB may be faulty. Contact your local supplier
for advice.
This protection is not active in Ready state.
Related parameters: None
Low Flow
The flow sensor connected to the smart card has activated low flow
protection.
Related parameters: 30E, 30G, 30H, 31B, 31C, 31D, 36G
Low Pressure
The pressure sensor connected to the smart card has activated low
pressure protection.
Related parameters: 30A, 30C, 30D, 32D, 32E, 32F, 36E
Low Water
The depth sensor connected to the smart card has activated depth
protection.
Related parameters: 30L, 30N, 30O, 34A, 34B, 34C, 36I
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Nidec Digistart D4 Specifications

General

Brand	Nidec
Model	Digistart D4
Category	Controller
Language	English