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Control Assembly Service
26 310554V
Control Assembly Service
Servicing the Control Assembly
This part of the manual provides information about the
following control assembly components:
• Indicator Lamp Button and Select Switch (page 26)
• Light Bulb (page 26)
• MAIN Power Switch (page 27)
• Potentiometer (page 28)
Lamp Button and Switch
Removal
1. Shut off system power at the main circuit breaker.
2. At the control assembly, move the MAIN power
switch to the OFF position.
3. Unlock and open the hinged cover of the control
assembly enclosure.
4. Disconnect the lead wires from the fixture terminals.
Refer to F
IG. 21 and FIG. 22 for lead wire identifica-
tion. If necessary, label the wires to facilitate reas-
sembly after the fixture is replaced.
5. Loosen two screws which clamp the fixture to the
cover. Rotate the fixture counter–clockwise relative
to the lens cover or switch operator. Separate the
two parts of the fixture and remove them from the
cover.
Lamp Button and Switch
Replacement
1. Reverse the disassembly procedures 3-5 in the pre-
vious section.
2. Refer to F
IG. 21 and FIG. 22 for lead wire identifica-
tion.
3. Apply system power at the main circuit breaker.
4. Move the MAIN power switch to the ON position,
applying power to the control assembly.
5. Verify that the replaced fixture operates correctly.
6. Return the orbital dispenser and control assembly to
normal operating condition.
Light Bulb Removal
Remove the light bulb as follows:
1. Shut off system power at the main circuit breaker.
2. At the control assembly, move the MAIN power
switch to the OFF position.
3. Unscrew and remove the indicator light lens.
4. Gently press and rotate the bulb counter-clockwise,
1/4 in. of a turn, unlocking the bulb from its socket.
Remove the bulb from the socket.
Light Bulb Replacement
Replace the light bulb as follows:
1. Insert the light bulb in the socket.
2. Gently press and rotate the bulb clockwise, 1/4 in. of
a turn to lock the bulb in its socket.
3. Replace the lens.
4. Apply system power at the main circuit breaker.
5. Move the MAIN power switch to the ON position,
applying power to the control assembly.
6. Verify that the light bulb operates correctly.
Refer to the Parts information on pages 34, 36, and
38 while servicing the control assembly.
ELECTROCUTION HAZARD
Installing and servicing this equipment requires access
to parts which could cause an electric shock or other
serious injury. Have only qualified electricians access
the control assembly.
ELECTROCUTION HAZARD
Installing and servicing this equipment requires access
to parts which could cause an electric shock or other
serious injury. Have only qualified electricians access
the control assembly.