Technical Manual
P&B Engineering
ISSUE 7 28/9/99
Page
31
13. Fault Finding
This procedure details some of the more common faults which may cause the to not operate as required.
This is usually due to incorrect settings or logic and will hopefully assist to rectify the situation.
•
Check all connections at the rear of the unit have been made correctly, especially:-
Interlock
Isolator
Authorise Key
Emergency Stop (if enabled)
•
Switch on the and ensure that the 'Power On' LED is illuminated. If not check customer system and the
mains fuse at the rear of the .
•
Select the 'Logical Inputs' menu using the 'Data Page' key.
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Check that the logical status of the is that required for operation and start the unit.
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If the unit will not start; message 'Unable to Start, Check System' appears; check firstly the Logic Status Menu for
drive availability, if not available:-
1).Check 'Local' position if starting from local.
2).Check 'Interlock' is closed.
3).Check 'Isolator' is closed.
4).Check 'Stop Button' is in correct position.
5).Check that 'Protection Only Mode' is correctly selected.
6). If in 'Remote', check correct selection of data transfer, i.e. PLC or Serial Port.
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If the unit starts but alarms immediately, check the following:-
1).Ensure 'System Parameter Settings' are correct.
2).Ensure 'Tripping/Alarm Options' are correct.
3).Ensure correct temperature measurement device has been selected, i.e. Thermistor or RTD.
NOTE: When selecting RTD PT100 the 100 Ohm resistance refers to the resistance at zero temperature.
Ensure the normal working temperature figure is added to this value. Usual setting approximately 140
Ohm.
4).If selecting Thermistor, ensure correct type, i.e. +ve or -ve.
5).Check that the unit passes the 'Self Test Program'. (See instruction manual to operate).
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When using the Goldstart with a single phase input; special care needs to be given to the System
Parameter Settings to obtain correct results.
In particular the Line Voltage parameter should be set at 1.732 times the expected line voltage, e.g.
11KV system; set line voltage at 11Kv x 1.732 = 19KV
The VT Primary and VT Secondary values are set normally, i.e.
VT Primary = 11KV
VT Secondary = 110V
For Low Voltage systems, using for example a 240V phase to neutral input, the line voltage should be set to 415V.
If the unit still will not operate or still keeps alarming and has passed its self test, then seek further assistance from our
application help desks on Manchester 0161-230-6363.
Summary of Contents for MPC2000+
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