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Table 4.
Error Descriptions & Possible Causes
Original Error Description
Possible Cause
Input 24V Low Voltage
Failure on 24V PSU or PSU cabling
Controller Temperature High
Controller temperature found higher than 80 degrees
Controller Fan Not Running
Fan wire maybe disconnected or fan motor malfunctions
Operation Mode Changed
Operation mode change requires a unit reset.
I2C Comm Error
Possible EEPROM chip error
PLC Mode Changed
Mode changed due to switching when power is turned on
PLC LED Inhibit (Chamber Door) open
Chamber door not closed (LED Inhibit PLC line not asserted)
PLC Power Short
Voltage on PLC Power Signal is less than 20VDC, or cable not firmly
connected
Driver 0/1/2/3 24V Low Voltage
24V power supply of Driver 0/1/2/3 bad
Driver 0/1/2/3 Temperature 90
Fan not working properly, or air intake blocked
Driver 0/1/2/3 Temperature 80
Fan not working properly, or air intake blocked
Driver 0/1/2/3 Fault Out
LED error found and notified by Driver 0/1/2/3
Driver 0/1/2/3 Comm Bad
Bad communication due to error signal
Driver 0/1/2/3 Channel 0/1 LED Temperature 90
Fan not working properly, or air intake blocked
Driver 0/1/2/3 Channel 0/1 LED Temperature 80
Fan not working properly, or air intake blocked
Driver 0/1/2/3 Channel 0/1 LED Temperature 70
Fan not working properly, or air intake blocked
Driver 0/1/2/3 Channel 0/1 LED Temperature 0
ADC chip malfunction
Driver 0/1/2/3 Channel 0/1 LED Temperature
Low
LED working temperature of Ch0/1 of Driver 0/1/2/3 found lower than low
limit
Driver 0/1/2/3 Channel 0/1 LED Temperature
High
LED working temperature of Ch0/1 of Driver 0/1/2/3 found higher than high
limit
Driver 0/1/2/3 Channel 0/1 LED Voltage Low
LED working voltage of Ch0/1 of Driver 0/1/2/3 found higher than high limit
Driver 0/1/2/3 Channel 0/1 LED Voltage High
LED working voltage of Ch0/1 of Driver 0/1/2/3 found lower than low limit
Driver 0/1/2/3 Channel 0/1 LED Current Low
LED working current of Ch0/1 of Driver 0/1/2/3 found higher than high limit
Driver 0/1/2/3 Channel 0/1 LED Current High
LED working current of Ch0/1 of Driver 0/1/2/3 found lower than low limit
Driver 0/1/2/3 Channel 0/1 LED Out
LED of Ch0/1 of Driver 0/1/2/3 found bad
Driver 0/1/2/3 Channel 0/1 LED NA
LED of Ch0/1 of Driver 0/1/2/3 not found
Driver 0/1/2/3 UART Bad
UART of driver 0/1/2/3 found bad
Driver 0/1/2/3 Incompatible
Driver 0/1/2/3 firmware version not compatible with controller
Nvram Array None
No U-shaped board found or no NVRAM chip found
Nvram Array Bad
The data structure maybe bad
Nvram Driver 0/1/2/3 Bad
NVRAM of driver 0/1/2/3 found bad
Nvram Pc Uart Tx Bad
Possible communication error from computer
Nvram Data NA
No data found in the NVRAM
Nvram Operation Both Bad
No programming or chip error