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15. Fault Trees
Check Safety Glass
and Lever
Test 1
Is power relay pulling in?
Yes
Lamp
Lamp
old
new
Replace
Go to
lamp
test 3
All
O.K.
Test 3
500+ VAC on
#2 yellow & #3
pruple?
Yes
Possible
faulty
lamp or
trigger
board
Check wiring from
ballasts and voltage
set switch to
terminal switch and
cap pac.
94MS41 Rev. C1 S/W Ver 2.06
No Strike Fault Tree
when light turned on?
Yes
Good
No
Test 2 Check wires and
vlotages on #12 red & #14
black 200~245 VAC to top
of power relay
Still
no
strike
between #4 white &
No
500+ VAC
between #3
purple on
terminal
strip to
orange com
on cap pac?
Yes
No
Go to test 2 after
checking wires on
voltage set switch
Does shutter rotate
No
Good
Reinstall
safety glass
Go to test 1
No good
Good
Check for 0 VAC
#10 black on
terminal strip
Yes
Check for 120 VAC
on PCB power
connector pins 2
white & 8 red
Yes
Check the wires
from#2 & #8 to
power relay
No
Are any LED's
lit on the PC
Board?
Yes
No
Go to test 2 after
checking PC
Board fuse
Repair or
replace
wires
No
Thermostats,
safety switch or
associated wiring
could be faulty
No
Check PCB fuse
No good
Good
Replace
Replace PC
fuse
Board
15-1
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