3.1.2 ENF1 tripped, possibly in combination with mains fuses
Problem most likely caused by kV unit malfunction (kV-control, kV-power, converter(s), HV transformer) or external
parts e.g. HV cable(s) or tube.
WARNING
Make sure that the DC voltage in the converter is discharged.
▪ Open the cover of the frontal (and rear where present) converter.
▪ Measure DC at PCB kV-power EQ100 at E2 – C1 (at both converters, see layout drawings attached).
The measured DC must be < 10VDC.
3.2 CHECK FOR OPEN SPRINGS AT DAMPING RESISTORS
EN :R1 safety resistor 47Ω 100W 4512 100 45441
:R2
:R3
▪ Record the conditions in the checklist (last pages).
▪ Check for open springs at damping resistors.
Springs might be open if all breakers are ON when the service comes to the site.
In this case the generator must have been switched ON after all fuses and breakers were reactivated. Short-
circuit in the converter or its mains rectifier/filter could have happened.
Springs can be resoldered. If the springs have to be resoldered, use as little solder as possible.
▪ Check that the ceramic resistor bodies do not have cracks. In case of cracks the springs must be resoldered.
3.3 CHECK FOR CONTACTS THAT ARE WELDED AT BREAKERS AND CONTACTORS
▪ Switch OFF breakers ENF1 and ENF2.
ENF1 L1 – T1 automatic circuit-breaker ENF1 Optimus 50 2422 129 15514
L2 – T2 or successor 2422 129 16291
L3 – T3 Optimus 65/80 2422 129 15513
or successor 2422 129 16292
ENF2 L1 – T1 automatic circuit-breaker ENF2 Optimus 50/65/80 2412 129 00341
L2 – T2 or successor 2422 129 16288
L3 – T3
ENK1 phase 1 2 – 1
phase 2 4 – 3
phase 3 6 – 5
contactor ENK1 Optimus 50 2422 132 06625
or successor 2422 132 07382
+ R/C circuit 2422 135 04662
Optimus 65/80 2422 132 06624
or successor 2422 132 07383
+ R/C circuit 2422 135 04662
Converter test kit OPTIMUS for OPTIMUS 50/65/80 gen‐
erators release 3.x with converters 4512 104 7231x
Conv test Optimus CSIP Level 1 (08.0)
© 2008 Koninklijke Philips Electronics N.V.
ALL RIGHTS RESERVED
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