JUMO 709040 TYA-110 thyristor power unit Operating Manual - Manual (Page 53)

Power units 02.06 53
8 Faults
The thyristor power unit does not require any maintenance.
In the event of a fault, the following points should be observed:
8.1 Fault-finding
If faults occur during commissioning, we recommend that you first check the
positions of the internal switches.
v Section 6.3 “Summary of possible settings”
If the fault persists, check the following items:
- Is the supply voltage present for the thyristor power unit?
Check the phase sequence as well.
- Are all other connections also correct?
- Is the controller operating properly?
Check the operation manually, by using an external potentiometer.
v Section 6.4 “Control inputs”
8.2 Replacing the semiconductor fuse
If the red LED “fuse” lights up, this means that a semiconductor fuse has
blown.
h Disconnect the system from the supply voltage.
v Section 6.1 “Opening the housing”
8.2.1 Type TYA-110/3, 025 to 100, ...
Wrench 10 mm a/f