GAI-Tronics 12576-115 Access Panel with VFD, 3x5 - Manual (Page 7)

Pub. 42004-635L2
Model 12576-115 Access Panel with VFD Page: 7 of 8
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02/98
How to Diagnose Assembly Faults
Servicing Guidelines
1. Notify plant personnel of a system shutdown prior to servicing the unit.
2. Disconnect power before connecting external wiring or installing or removing the access panel.
Symptom Action
Access panel does not function.
(No push buttons detected, no
LED lamps activate, VFD is
blank, and handset is not
functioning.)
• Verify ac power is applied to access panel. Verify that ac power
cord is plugged-in. Also verify that ac outlet is active.
• Verify that the twisted-pair data cable is properly connected
between the access panel and the control unit.
• Call for service of the access panel.
No push buttons are detected.
• Verify that the twisted-pair data cable is properly connected
between the access panel and the control unit.
• Call for service of the access panel.
Some push buttons are not
detected. Call for service of the access panel.
No LED lamps activate.
• Verify that the twisted-pair data cable is properly connected
between the access panel and the control unit.
• Call for service of the access panel.
Some LED lamps do not
activate.
• Verify that an LED lamp is installed in the faulty illuminated
push button(s).
• Replace the faulty LED lamp(s).
• Call for service of the access panel.
Piezo alarm does not function. Call for service of the access panel.
VFD does not function, even
during a lamp test. Call for service of the access panel.
Handset does not function
properly. Call for service of the access panel.
External speaker interface does
not function.
• Verify wiring between the speaker connector on the access panel
and the speaker itself.
• Determine if speaker is faulty by connecting a different speaker
to the speaker interface and verifying operation.
• Call for service of the access panel.