Diagnostics And Troubleshooting; Troubleshooting - Curtis 1352 Manual

6
Curtis 1352 eXm Manual,

DIAGNOSTICS AND TROUBLESHOOTING

When an error occurs in the eXm, an emergency message is produced on the
CAN bus according to the CANopen standard. This message is sent once.
When the fault clears, a No Fault emergency message is transmitted; see page 16.
At each new fault, the fault code and hourmeter time are logged in a
16-error-deep FIFO buffer.
Additionally, the highest priority fault code will be flashed on the red
and yellow status LEDs. The red LED enumerates the digit place and the
yellow LED enumerates the value. For example, a code 23 would be displayed
as one red flash, followed by two yellow flashes, followed by two red flashes
and finished with three yellow flashes. The eXm's two LEDs will display this
repeating pattern:
red
✱
(first digit)
The numerical codes used by the yellow LED are listed in the troubleshooting
chart (Table 5).
During normal operation, the yellow LED flashes continuously.
On power-up, the integrity of the code stored in memory is automatically
tested. If the software is found to be corrupted, the red Status LED will flash
rapidly. Should this occur, contact your Curtis representative as the unit will
require a new code download.

TROUBLESHOOTING

Table 5 provides the following information for each fault: name of fault, code,
description, effect of fault, possible causes, and how the eXm can recover from
the fault.
Whenever a fault is encountered and no wiring or vehicle fault can be
found, cycle power to see if the fault clears. If, after attempting to correct the
possible causes, the fault code persists, replace the unit. If replacing the eXm
does not resolve the problem, the eXm is likely good and should be re-installed
so that further debug can be carried out by a qualified technician.
Note: An EEPROM fault (code 12) can occur in either of the two
EEPROM blocks: Normal or Backup. If the fault is in the Normal runtime
EEPROM block, an SDO Write to any parameter in the 3000h address range
should clear the fault. If the fault is in the Backup EEPROM block, an SDO
Write issuing the Backup_Command to the Store Parameters object should
clear that fault. If neither procedure will clear the fault, the eXm may have a
bad EEPROM and will need to be replaced.
Rev. D
8 — DIAGNOSTICS & TROUBLESHOOTING
yellow red
✲ ✱ ✱
✲
(2)
(second digit)
yellow
✲ ✲ ✲
(3)
31