WEG CFW300 V1.3X, Programming Manual

Page: 121 / 157

Faults and Alarms
CFW300 | 14-3
14
14.2 IGBTS OVERLOAD PROTECTION (F051 AND A050)
The power module temperature is monitored and indicated in parameter P030 in degrees Celsius. This value is
constantly compared to the overtemperature fault and alarm trigger value of the power module F051 and A050,
according to
Table 14.3 on page 14-4 .
Table 14.1: Overtemperature actuation levels of the power module
Frame Size Level A050 Level F051
A 90 °C (194 °F) 100 °C (212 °F)
B 116 °C (240 °F) 126 °C (258 °F)
In addition to the indication of alarm A050, the overtemperature protection gradually reduces the switching
frequency to 2.5 kHz. This overtemperature protection characteristic can be disabled in the control configuration
parameter P397.
ATTENTION!
The default setting of P397 meets most application needs of the inverter.
Therefore, avoid modifying its content without knowing the related consequences. If you are not
sure, contact WEG Technical Assistance before changing P397.
P352 - Fan Control Configuration
Adjustable
Range:
0 = OFF
1 = ON
2 = CT Factory
Setting:
2
Properties:
cfg
Description:
The CFW300 is equipped with a heatsink fan, and the activation will be controlled via software by means of the
inverter programming.
The options available for the setting of this parameter are the following.
Table 14.2:
Options of the parameter P0352
P0352 Action
0 = OFF Fan off
1 = ON Fan on
2 = CT Fan is controlled via software
14.3 MOTOR OVERTEMPERATURE PROTECTION (F078)
ATTENTION!
The PTC must have reinforced insulation of the live parts of the motor and other installations.
This function protects the motor against overtemperature through indication of fault F078.
The motor needs a triple PTC temperature sensor. The reading of the sensor may be done by means of the analog
inputs.
For the reading of the PTC, it is necessary to configure it for current input and select the option “4 = PTC” in P231
or P236. Connect the PTC between the 10 Vdc and the analog input.