MNL000449.doc
Revision 22
02/15/2019
Gasguard Distribution
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
Page
10
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Versum Materials Confidential
Preventative Maintenance – Electrical Components
NOTE: Asterisk (*) indicates that Preventative Maintenance task requires a shutdown.
Component
Task
Minimum Frequency
Power Supply
Replace as recommended.
See Section 10.3
Verify power supply voltage is between 5.1 and
5.2 Vdc. Adjust as necessary following proper
Versum Materials, Inc. operational procedures.
Yearly
Surge Protector
Check LED. If LED is Red, the surge protector
must be replaced.
Yearly
Instrument Air Pressure
Switch
Check that pressure switch and gauge are in
working condition.
Yearly
LCD Screen
Check for readability and brightness. Adjust
contrast as necessary. Replace backlight as
necessary.
Yearly
E-Stop
* Test E-Stop.
Every 2 years
Keypad Membrane
Check each dome button. Look for mis-keying
and multiple stroking. Check for proper sealing
of adhesive around edge of graphic.
Yearly
EMI/RFI Gasket
Look for aging, cracks, and peeling of the
gaskets. Also check the surface onto which the
gaskets seal. Look for oxidation, corrosion, and
foreign material that would prevent proper
sealing.
Yearly
Door Hinges
Check resistive hinges and adjust accordingly.
Yearly
Door Locking Prop
Check that prop locks and stays in place until
locking button is depressed.
Yearly
Solenoids
Verify that LED on solenoid lights when
component is activated. Gas should flow
through the solenoid. Verify that the pressure
is off within the required response time. Listen
for leaks inside the controller. Check that the
pneumatic supply does not exceed the
maximum recommended pressure.
Yearly
Z-Purge Switch
* Test switch.
Yearly
Power and signal wiring
Visually inspect for insulation damage,
corrosion, shortages.
Yearly
Grounding Connections
Verify that there is minimum resistance in
ground line as specified in Section 4.1 of the
Gasguard Operations manual. Tighten
connections as needed.
Yearly