CHAPTER 8 - DIAGNOSTICS AND TROUBLESHOOTING
169
8.2 TROUBLESHOOTING
PROBLEM
POINT TO BE
CORRECTIVE ACTION
CHECKED
Motor does not run
Incorrect wiring
1. Check the power and control connections. For example the DIx digital inputs
programmed for Enabling or External Fault must be connected to +24V.
Incorrect programming
1. Check if the parameters are properly programmed for the application.
Fault
1. Check if the Soft-Starter is not disabled due to a Fault condition
(Refer to table 8.1).
Motor does not reach
Motor stall
1. Increase the current limit level, if programmed to current limit.
nominal speed
2. Increase the torque limit level, if the torque control mode has been selected.
Motor speed varies
Loose connections
1. Disable Soft-Starter, switch OFF the power supply and tighten all connections.
(oscillates)
2. Check if all internal connections are tightened.
Motor speed too low
Motor nameplate data
1. Check if the used motor meets the application requirements.
or too high
Display OFF
Keypad connection
1. Check the keypad connections to the Soft-Starter.
Check the supply voltage
1. Nominal supply voltage must be following:
of the control board
U
min
= 93.5 Vac
(X1.1, X1.2 and PE)
U
max
= 253 Vac
Blown fuse
1. Replace the fuse of the control board.
Jerking during
Parameter setting
1. Reduce the time set at P104.
pump deceleration
of the Soft-Starter
Table 8.2
- Troubleshooting of the most frequent problems
NOTE!
When contacting WEG for service or technical assistance, please
have the following data on hand:
- Soft-Starter Model;
- Serial number, manufacturing date and hardware revision, as indi-
cated on the Soft-Starter nameplate (Refer to Section 2.4);
- Software Version (Refer to Section 2.2);
- Information about the application and Soft-Starter programming.
8.3
TECHNICAL
ASSISTANCE
CONTACTING
Alarm tripping form:
- It indicates the code on the LED display and the alarm description
on the LCD display;
- It is only an indication. The motor is not stopped;
- The relay that is programmed for “No Alarm” will be deactivated;
- The relay that is programmed for “Alarm” will be activated;
- They are automatically reset when the alarm situation disappears.
OTHER FAULTS:
- Relay is switched off when programmed to "No Error";
- Relay is switched on when programmed to "With Error";
- Motor is switched off, when it is enabled;
- Indicates the fault code in the LED display;
- The LCD display indicates the fault code and the fault description;
- Some data is also saved in the EEPROM memory:
.
The number of the occurred fault (the five previous faults are
displaced);
. The status of the thermal protection (motor overload);
. The time of the running/powered hours.
Summary of Contents for SSW06
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