10. Other information - Cooling
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– WTS-300-E - V4.1 - 20.01.2022
10.9 Thermal protection - / Fault monitoring compressor [P72]
Fault monitoring is used to indicate problems when running up to three separate
compressors.
The fault message occurs depending on the parameterisation
- by evaluation of the potential-free auxiliary contact of the motor protection
switch (setting 1, 2), or
- by evaluation of the potential-free auxiliary contact of the compressor contac-
tor (setting 3, 4),
The following settings for fault monitoring are possible:
-
Parameter [P72] is at 0
Fault monitoring is deactivated
-
Parameter [P72] is at 1
The auxiliary contact of the motor protection relay or of the motor protection
switch is queried.
Is this auxiliary contact opened
= fault “F53” is displayed.
-
Parameter [P72] is at 2
The auxiliary contact of the motor protection relay or of the motor protection
switch is queried.
Is this auxiliary contact closed
= fault “F53” is displayed.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
Parameter [P72] is at 3*
Fault monitoring via switch-on feedback from the compressor contactorauxil-
iary contact (N/O contact).
-
Parameter [P72] is at 4*
As selection 3, but switch-on feedback from the compressor contactorauxiliary
contact (N/C contact).
* Settings 3 and 4:
When the compressor is switched on, feedback is expected at the digital input
of the controller after 60 seconds at the latest. If this feedback is not received,
fault "F53" is triggered.
Assignment of digital inputs
Fault monitoring is only possible if a digital input [A21..A33] with function 5 is as-
signed for each compressor.
The first assigned digital input monitors compressor 1, the second one compressor
2 and the third one compressor 3.
