Rice Lake 920i USB Installation Manual V5.05 - Manual (Page 118)

112 920i Installation Manual
11.0 Appendix
11.1 Troubleshooting
Table 11-1 lists general troubleshooting tips for various hardware and software error conditions. See the following
pages for additional information about specific diagnostic tools. Additionally, the CPU board has diagnostic LEDs
that flash when sending/receiving data, and a heartbeat LED for troubleshooting.
Table 11-1. Basic Troubleshooting
Symptom Cause/Remedy
Indicator does not power up Possible blown fuse or bad power supply.

Check all voltages on CPU board. Power supply should output both +6V and –6V
levels to the CPU board (see Figure 2-8 on page 13). If power supply appears bad,
check the small glass fuse (2.5A, 5x20mm PN85791) on the power supply board.
Front panel power indicator blinking ( )
Power supply overloaded. Check for shorts in A/D card regulators or in the
DC-to-DC converter of any installed analog output or pulse input cards.
"Blue screen" Check LCD contrast pot (under interface board access cover; see Figure 2-4 on
page 11). Possible corrupt core software; reset or reload software.
“A critical configuration error has been detected” Indication of a bad battery. Press Enter to retrieve the last Save and Exit contents.
Hangs in "888" display Corrupt core software. Reset or reload software.
Tare and truck data pointers are corrupt, Tare
storage is corrupt error messages at startup Possible dead battery. Perform configuration reset then check for low battery
warning on display. If battery is low, replace battery, perform another configuration
reset, then reload files.
Divide by zero error message at startup User program error. See Section 11.1.3 on page 113
ERROR message in weight display Excitation voltage too low or off. Excitation voltage is provided by the A/D card.
Dashes in weight display Overrange or underrange scale condition. Check scale. For out-of -range
conditions in total scale display, check all scale inputs for positive weight values.
Display reads 0.000000 Scale not updating. Check for bad option card hanging the bus.
Cannot enter setup mode Possible bad switch. Test switch; replace interface board if necessary.
Serial port not responding Possible configuration error. For command input, ensure port INPUT parameter is
set to CMD.
A/D scale out of range Check source scale for proper mechanical operation. Check load cell and cable
connection. Possible bad load cell: check indicator operation with load cell
simulator.
Locked — Scale in use Scale is assigned as an input to a total scale or is the source for a serial scale,
analog output, or setpoint. If not correct, deconfigure this scale assignment and
reconfigure as required.
Serial scale out of range Check source scale for proper mechanical operation. Check cable connection.
Possible format mismatch between serial scale and 920i: Check SFMT
specification under SERIAL menu.
Option x Error Field bus card (Profibus, DeviceNet, or Remote I/O) in slot x failed to initialize.
Option card failure Possible defective card or slot. Disconnect power, install card in different slot, then
apply power again.
Option card hardware diagnostic error Required option card not found. See Section 11.1.1 on page 113.
Expansion board does not power up Check expansion board power supply.
Download error during PLOAD command Insufficient memory for PLOAD mapping due to older CPU board. Large programs
may require Rev E or later 920i
CPU board.