R
EPLACEMENT KIT INSTRUCTIONS
Air Flow Switch PCB and Power Supply
Replacement
Contents This publication contains the necessary procedures to replace an air
flow switch PCB and the air flow switch power supply.
What This Kit Contains Using the table below, verify that you have received the appropriate
items:
For this part: You should receive this quantity:
air flow switch PCB 1
air flow switch power supply 1
Other Items Needed Before you begin, be sure you also have the following:
• Whatever tool(s) you will need to:
• Disconnect and connect wiri ng
• Remove, loosen, and tighten screws (including terminal
screws)
• Documentation:
• Your drive system schematics
• Your product’s use r/ installation manual
Publication 2300-5.12 - April 1998
2 Air Flow Switch PCB and Power Supply Replacement
Safety Precautions The following general precautions apply to Drive Systems’ products
and their respective drive systems:
ATT ENTIO N: Only those familiar with the drive
system, the products used in the system, and the
!
associated machinery should plan or implement the
installation, startup, and future maintenance of the
system. Failure to compl y can res ult i n person al inj ury
and/or equipment damage.
ATTENTION: Verify that all sources of AC and DC
power are deenergized and locked out or tagged out in
accordance with the re quireme nts of ANSI/ NFPA 70E,
Part II.
ATTENTION: The system may contain stored ener gy
devices. T o avoi d the hazard of el ectrica l shock, verify
that all voltage on capacitors has been discharged bef ore
attempting to service, repair, or remove a drive system
or its components. You should only atte mpt the
procedures in this manual if you are qualified to do so
and are familiar with solid-stat e contro l equipment and
the safety procedures in publication NFPA 70E.
ATTENTION: When servicing any unit, do not drop
any nuts, bolts, washers, etc . inside t he unit as they may
cause a short circuit on power up . Dropped i tems mu st
be found and removed before you apply power.
ATTENTION: This drive system contains ESD
(Electrostatic Disc harge) sensitive parts and assemblie s.
Static control precautions are required when installing,
testing, or repair ing this assembly. Component damage
can result if ESD control procedures are not followed.
If you are not familiar with static control procedures,
refer to Rockwell Automation publication 8000-4.5.2,
Guarding Against Electrostatic Damage or any other
applicable ESD protection handbook.
Special Instructions The following special instructions apply to Drive Systems’ products
and their respective drive systems:
Important: As you remove parts, place them in order on a clean
surface because you will need to reuse some of them
during reassembly.
Publication 2300-5.12 - April 1998
Important: Some washers, such as th e d iod e c lamp wa she rs and the
Belleville washers used on busbar bolts, have only one
correct orientation.
Air Flow Switch PCB and Power Supply Replacement 3
Removing an Air Flow Switch PCB Follow this procedure to remove an air flow switch PCB:
1. Remove all Lexan™ guards that shield the PCB.
2. Disconnect where shown in Figure 1:
• the input power wiring
• the output contact wiring
• the air flow sensor wiring
Figure 1
Air Flow Switch PCB
NO1 NO2
1
23
SIG
1
+5V
COM
IN2
IN1
2
3
4
5
6
BARCODE
3. Remove the PCB from the 4 plastic standoffs.
4. Remove the air flow switch PC B.
Installing an Air Flow Switch PCB Follow this procedure to install an air fl ow switch PCB:
1. Put the air flo w switch PCB in p lace.
2. Secure the air flow switch PCB to the standoffs.
3. Connect and verify:
• the input power wiring
• the output contact wiring
• the air flow sensor wiring
4. Replace any Lexan guards that you removed.
5. Dispose of the removed part according to your company’s proce-
dures and local ordinances.
Publication 2300-5.12 - April 1998
4 Air Flow Switch PCB and Power Supply Replacement
Removing the Air Flow Switch
Power Supply
Follow this procedure to remove an air flow switch power supply:
1. Remove all Lexan guards that s hield the power supply.
2. Disconnect the input and output power wiring. (Refer to Figure
2.)
3. Snap the power supply out of the snap track.
Figure 2
Power Supply
Installing the Air Flow Switch
Power Supply
Publication 2300-5.12 - April 1998
Follow this procedure to install an air flow switch power supply:
1. Verify that the power supply has the proper rating according to
the information located on th e system schem atics.
2. Snap the power supply into the track.
3. Connect and verify the input and output power wiring.
4. Replace any Lexan guards that you removed.
5. Dispose of the removed part according to your company’s proce-
dures and local ordinances.
Air Flow Switch PCB and Power Supply Replacement 5
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Publication 2300-5.12 - April 1998
Lexan is a trademark of General Electric Corp.
Publication 2300-5.12 - April 1998
Supersedes Publication 2300-5.12 - September1997
1998 Rockwell International. All Rights Reserved. Printed in USA
P/N 185230
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