1709: 
0/996/682/930
Module: PM100RLA120 -ok
AXIS-1 2V2
Corrosion!
Flash on power PCB.
Fast fuse 63A => 3*25A fast.
2753: COOLER 24V: NMB-MAT MODEL 2410ML-05W-B69 
(with digital TACHO) 
3 units are replaced to:
RS: 335-7012 TUDC24B4 - without wire TACHO 
but with internal TACHO circuit and 100% compatible.
RS: 191-9277 - pin to pin 100% compatible. 
with 2410ML-05W-B69 (only no pin to pin). 
Corrosion.
Cleaning.