Service manual

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Quantum Control Troubleshooting
53.“Door Open” Indicator
“Door Open”
Indicator
Is there
24 volts across
terminals H5-7 and
H5-4 on the
control?
Is
there 24 volts
to the normally open
contact on the
lint panel
switch?
No
Replace
control.
Yes
Correct the wiring
between the N.O.
terminal on the lint
panel switch to
terminal H2-1 on
the control.
Yes
Is
there 24 volts
to the output side of
the secondary
fuse?
Yes
Correct the wiring
between the fuse
and the common
terminal of the
door switch.
Is
there 24 volts
to the input side
of the secondary
fuse?
Yes
Check fuse.
Replace if
necessary.
TMB2271S
No
Yes
Correct wiring
between the
transformer and
the fuse.
Is there
24 volts across
terminals 2 and 3
of the transformer
secondary?
No
Is there 24 volts
to the common
terminal of the lint
panel switch?
Yes
Replace the lint
panel switch.
Is
there 24 volts
at the normally open
terminal of the door
switch with the door
closed?
Yes
Correct the wiring
between the door
switch and the lint
panel switch.
No
No
Note: All voltages
are to be measured
to transformer
common, unless
otherwise stated.
(1)
Is
there 24 volts
to the common
terminal of the door
switch?
Check door switch
for proper operation.
Replace if
necessary.
(2)
(3)
(4)
(5)
Is
line voltage
present across the
black and lt blue wires
on the primary side of
the transformer?
Replace
transformer.
Is the
primary fuse
good?
Replace the
primary fuse.
Correct wiring from terminal
block to transformer. Verify
that unit is connected to
power and the power is on.
No
Yes
No
No
Yes
No
No
Yes
(6)
(7)
(8)
(9)
(10)