Kraft Powercon PRX Series, Manual

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KraftPowercon Sweden AB, Hjalmar Petris väg 49, S-352 46 Växjö, Sweden, Tel: +46 470-705200, Fax: +46 470-705201,
www.kraftpowercon.com
9 FAULT TRACING
9.1 SAFETY INSTRUCTIONS
WARNING! This product contains dangerous voltage that when touched can cause electric shock,
burns or death.
Service/maintenance work that involves working with removed contact protection devices may
only be carried out by authorised service personnel (see section
2 SAFETY INSTRUCTIONS ).
Before work can commence on the equipment, it must be guaranteed that the internal capacitors
are discharged through the following procedure:
1. Disconnect the incoming mains feed.
2. Close the equipment's mains breaker.
3. Wait at least 5 minutes to allow the capacitors to discharge.
WARNING!
In the event of overvoltage, the electrolytic capacitors and varistors may explode. If
work must be done when the equipment is powered up and with exposed circuit boards, splinter
protection must therefore be used (protective goggles and screens).
9.2 FAULT TRACING FOLLOWING ALARM
Fault tracing in connection with alarm messages is described in the Manual for monitoring unit
PCM2 .
9.3 OTHER FAULT TRACING
The type of faults that can be attributed to the rectifier in general are dealt with here. For faults that
relate to the monitoring unit see the
Manual for monitoring unit PCM2 .
In order to see the indicator lamps of the rectifier modules the front panel must be folded out.
The primary fuse trips when the rectifier is turned on
Cause 1: Incorrect type of mains fuse. Check that the mains fuse observes the specifications in
section 3.1 ELECTRICAL DATA .
Cause 2: Internal rectifier module fault. Install one module at a time in order to identify the
module that is responsible for the problem. Replace the defective module.
The rectifier has no output, green indicator lamp “AC OK” is out
Cause 1: Mains voltage missing. Check that there is mains voltage to the mains input terminals
and that the mains breaker is closed.
Cause 2: Rectifier modules are not properly inserted.
The rectifier has no output, green indicator lamp “AC OK” and “DC OK” are lit
Cause 1: Input “EXT. FAULT” is used as external blocking and is in open position.
Cause 2: Fault in external output fuse. Check that the output fuses are properly dimensioned to
handle the rectifier's rated current.
The rectifier module's green indicator lamp “AC OK” is lit and “DC OK” is out
Cause 1: The rectifier module is probably defective. Replace the rectifier module.
Cause 2: If the red lamp ”ALM” is lit as well, the cause could be that the rectifier module has
tripped due to high output voltage, HVSD (High Voltage Shut Down). Reset by making
the module dead, which is easiest done pulling out the module for a couple of seconds
until all the lamps are off and then the put the module back in place again. If the fault
returns, the module is probably out of order. Replace the module.