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OPERATION
High Pressure Filter "HPF" Identification Codes of
LED H31
The LED "H31", illust. Z 21753, monitors all six high pressure fil-
ters. If a failure condition of a high pressure filter occurs, the LED
"H31" will begin flashing out a diagnostic code for identification of
the concerned filter. If more than one filter send a failure signal at
the same time, the LED will always show the diagnostic code of
that filter with the lowest number.
High Pressure Filter "HPF" number:
Code HPF #1
1
0.5s
Code HPF #2
1
0.5s
Code HPF #3
1
0.5s
Code HPF #4
1
0.5s
Code HPF #5
1
0.5s
Code HPF #6
1
0.5s
Example:
Identification Code for High Pressure Filter #4 :
When the differential pressure switch of high pressure filter #4
sends the signal "Filter restricted", the LED H31 will flash four
times at regular intervals of 0.5 seconds and then after two sec-
onds pause time will start again flashing four times at regular
intervals of 0.5 seconds and so on.
The number of the four 0.5 seconds interval flashing groups cor-
responds to the number of the high pressure filters.
1
2s
2
0.5s
0.5s
2s
2
3
0.5s
0.5s
0.5s
0.5s
2s
2
3
4
0.5s
0.5s
0.5s
0.5s
0.5s
0.5s
2
3
4
0.5s
0.5s
0.5s
0.5s
0.5s
0.5s
2
3
4
0.5s
0.5s
0.5s
0.5s
0.5s
0.5s
3.7 ELECTRICAL EQUIPMENT IN CAB BASE
1
1
2
1
2
1
2s
5
0.5s
0.5s
2s
5
6
0.5s
0.5s
0.5s
0.5s
2s
1
1
2
3
1
2
3
4
1
2
3
1
2
4
3
207
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