Troubleshooting
ASTAT XL Service Manual
3
Troubleshooting
3.1
Protection Responses
When a protection condition is detected, the ASTAT XL will write this to the event log and may also trip
or issue a warning. The soft starter's response depends on the Protection Action setting (parameter
group 16).
Some protection responses cannot be adjusted by the user. These trips are usually caused by
external events (such as phase loss) or by a fault within the soft starter. These trips do not have
associated parameters and cannot be set to Warn or Log.
If the ASTAT XL trips you will need to identify and clear the condition that triggered the trip, then reset
the soft starter before restarting. To reset the starter, press the
RESET
button on the keypad or
activate the Reset remote input.
If the ASTAT XL has issued a warning, the soft starter will reset itself once the cause of the warning has
been resolved.
3.2
Trip Messages
This table lists soft starter's protection mechanisms and the probable cause of the trip. Some of these
can be adjusted using parameter group 4 Protection Levels and parameter group 16 Protection Action,
other settings are built-in system protections and cannot be set or adjusted.
Display
Possible cause/Suggested solution
2 Phase - Damaged
SCR
This message is displayed if the soft starter tripped on “ Lx-Tx shorted” during
the pre-start checks and PowerThrough is enabled. It indicates that the starter
now operates in PowerThough mode (2-phase control only).
Check for either a shorted SCR or a short within the bypass contactor.
Related parameters: 15E
Battery/clock
A verification error has occurred on the real time clock, or the backup battery
voltage is low. If the battery is low and the power is off, date/time settings will
be lost. The ASTAT XL will continue to soft start and soft stop correctly.
Reprogram the date and time.
The battery is not removable. In order to replace the battery, the main control
PCB must be replaced.
Related parameters: 16K
Controller
This is a name selected for a programmable input. See Input A trip.
Current imbalance
Current imbalance can be caused by problems with the motor, the
environment or the installation, such as:
•
An imbalance in the incoming mains voltage
•
A problem with the motor windings
•
A light load on the motor
•
A phase loss on input terminals L1, L2 or L3 during Run mode
•
An SCR that has failed open circuit. A failed SCR can only be definitely
diagnosed by replacing the SCR and checking the starter's performance.
Related parameters: 4A, 5B, 16B
Current Read Err Lx
Where 'X' is 1, 2 or 3.
Internal fault (PCB fault). The output from the CT circuit is not close enough to
zero when the SCRs are turned off. Contact your local supplier for advice.
This trip is not adjustable.
Related parameters: None
Excess start time
Excess start time trip can occur in the following conditions:
•
parameter 1A
Motor Full Load Current
is not appropriate for the motor
•
parameter 2B
Current Limit
has been set too low
•
parameter 2D
Start Ramp Time
has been set greater than the setting for
2G
Excess Start Time
setting
•
parameter 2D
Start Ramp Time
is set too short for a high inertia load when
using Adaptive Control
Related parameters: 1A, 1C, 2B, 2D, 2G, 3B, 3D, 3G, 16H
DET-813
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