Rice Lake 920i Installation Manual V4.01 - Manual (Page 112)

106 920i Installation Manual
10.0 Appendix
10.1 Troubleshooting
Table 10-1 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 10-1. Basic Troubleshooting
Symptom Cause/Remedy
Indicator does not power up Possible blown fuse or bad power supply. Check fuses (see Section 2.8 on
page 16) and replace if necessary. Fuse specifications are listed on page 127; fuse
replacement part numbers are listed in Table 2-8 on page 18.
If fuses are good, check all voltages on CPU board. Power supply should output
both +6V and –6V levels to the CPU board (see Figure 2-6 on page 12). 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 2-3 on
page 10). Possible corrupt core software; reset or reload software.
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 10.1.3 on page 107
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 10.1.1 on page 107.
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.