SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Page 28 of 74
Test LED
option Test and method indications Comments
no.
52 Zone 3 comparators A–N A As option 42
(Secondary inject B–N B
Zone 3 fault) C–N C
A–B Z2
C–A AIDED TRIP
Zero sequence voltage level detector SOTF
(Apply low voltage and increase to
pick up)
Inhibit PSB opto input V~ FAIL
(Apply rated volts to A5–A6)
53 Memory input volts VC B* Option 53, LED B
(Apply rated volts to C phases) may be latched on
or off when rated
volts are not
present.
Monitor memory
on monitor output
socket pin 2 & 24,
disregard LED B
indication
Zone 6 comparator AB C
(secondary inject AB
Zone 6 fault) SW9 Z2 LED on when
Option setting switch SW9 Z2 switches in right
High set current level A Z3 hand position.
detectors B AIDED TRIP
(secondary inject content) C SOTF
N V~ FAIL
54 Zone 2 Timer switch 1280 A Indications lit
640 B when switches in
320 C right hand position.
160 Z2
80 Z3
40 AIDED TRIP
20 SOTF
10 V~FAIL
55 Zone 3 Timer ∞ A As option 54
Switch Settings 2560 B
1280 C
640 Z2
320 Z3
160 AIDED TRIP
80 SOTF
40 V~FAIL
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