PSI System Controls and Diagnostics
A500 User Manual
A500_UM_090115 Page 52 of 61
17
Fault-finding
Symptom Possible
Cause
Confirmation
Solution
No characters on the LCD on
power up
Unit failed to boot.
No communications possible,
status LED not blinking.
Power-cycle. If unit still does
not boot, contact your
supplier.
A500 runs normally, but no
LCD display
LCD failed or disconnected
Arrange service for the A500.
Unable to establish Ethernet
connection.
Incorrect IP address.
Unable to ping A500 at the
expected address.
Set correct IP address.
Another device has the same
address.
Ensure all devices in your
LAN have unique addresses.
Wrong type of network cable
(RCM3200 Ethernet processor
only).
Check cable – should be patch
cable for connection to a hub.
Use correct cable.
Unable to connect with a
direct PC to A500 link
Wrong type of network cable
(RCM3200 Ethernet processor
only).
Check cable – should be a
crossover cable for a direct
connection.
Use correct cable.
Unable to connect from the
PSI Diagnostic host.
Another instance of the
Diagnostic may already be
running on your network.
Run one host program only.
Looped devices not detected.
Fiber-optic cables
interchanged.
Check all TX and RX are
connected correctly.
Devices on loop have
incorrect mode switch
settings.
Check comms status of
devices on the loop.
Ensure all mode switches are
set to 0 for operation with
A500.