Fault Numbers At The Seven--Segment Display - Bosch PSU 5000 Series Instructions For Assembly And Operation Manual

7.5 Fault numbers at the seven- - segment display
Remedy
Remedy
Remedy
Remedy
1070 078 224--- 108
PSU 5000 / PSG 3000
Instructions for Assembly and Operation
The fault numbers given in the following table correspond to the LED numbers that
may appear at the seven-- segment display.
If no fault has been recognized, the value "0" will be displayed.
In the event of a fault, the welding sequence is immediately stopped. In this case,
the Bosch weld timer will immediately signal "Power supply fault" (temperature
monitoring circuit for power supply unit).
When the cause of the fault has been removed, you should first reset the fault
-- at the PSU with the reset button or the "Reset" input at X21/5, and then press
-- the acknowledgement button on the weld timer.
Please note: Fault "3" can only be reset by power off/on.
Transformer temperature
The temperature of the welding transformer is permanently monitored by thermo-
static switches. If the maximum admissible value is exceeded, the thermostatic
switch opens terminals X11/1 and X11/2 of the PSU.
Check cooling circuit of PSG for proper functioning.
Reduce welding heat.
Thermal diode overcurrent
The type of load is not permitted for the high--current diodes used.
Select lower welding current.
Select shorter ED (see load diagrams)
Driver fault
Transistor monitoring activated. Transistors may be defective.
Call Bosch service department
Inverter temperature
The temperature of the PSU is permanently monitored. The maximum admissible
value was exceeded.
Check PSU cooling system for proper functioning (water circuit ok?).
Reduce welding heat.
Monitoring and
diagnostics
7---3