Chicago Dryer King Edge VAc, Instruction Manual

Page: 179 / 302

King Edge Vac Repair
7-45
Photosensor Replacement
If a photosensor fails or is erratic, it should
be replaced immediately. All photosensors are
connected using either a quick-release connector
or a simple screw connector.
Required Tools
3/8” nut driver, screwdriver, scissors/
knife, plastic wire ties, pliers
Perform only when the unit is OFF
with power disconnected.
Make sure you have the correct type for
the photosensor to be replaced. For more
information on sensor location and type,
refer to the OPERATING PRINCIPLES
chapter, Electrical System section, Con-
trol System
subsection.
Turn power OFF at the main disconnect
switch.
Locate the photosensor to be replaced. As
appropriate:
Trace its wiring to the sensor’s connec-
tor plug (Figure 7-57) and disconnect.
Continue with the next step.
Unscrew the knurled nut which secures
the old photosensor (Figure 7-58 and
go to Step 5.
Cut any plastic wire ties securing the sen-
sor wiring along its path.
Unscrew the photosensor from the
mounting bracket. Be careful to save the
screws.
Using these screws, secure the new pho-
tosensor in position.
Plug or screw the photosensor into its
connector receptacle. Secure the sensor
wiring along its path, using plastic wire
ties as necessary.
1.
2.
3.
•
•
4.
5.
6.
7.
Check that the new photosensor is posi-
tioned properly by following the appropri-
ate sensor alignment procedure earlier in
this section.
Set to Dark Operate (DO) or Light Operate
(LO) as appropriate. Match the setting to
the sensor being replaced.
Properly set the new photosensor’s sen-
sitivity following the Photosensor Sen-
sitivity Adjustment procedure earlier in
this section.
Start the machine and process several
pieces of flatwork to make sure the new
photosensor is working correctly.
8.
9.
10.
11.
Figure 7-58: ...some photosensors have screw
connections for simple replacement.
Figure 7-57: Photosensors are connected to the
unit using white connection plugs or...
TOC INDEX