QAL Medical 480, Service And Technical Manual

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and troubleshoot the main PCB. Perform the extension limit check in the calibration mode to assure that
the cradle is not traveling outside the kneepot’s voltage range. Reset EE_ERROR byte by entering the
calibration routine.
[E11]: KNEEPOT WIPER VOLTAGE TOO HIGH
Error Action: This error causes the microcontroller to burn 11 in the EE_ERROR EEPROM and causes
the unit to stop.
Display: ANGLE ERROR [E11]
Cause: The problem may be in the main PCB or the kneepot ground may have an open.
Corrective Action: Examine the kneepot, the kneepot cable and kneepot connector for possible opens
and troubleshoot the main PCB. Perform the extension limit check in the calibration mode to assure that
the cradle is not traveling outside the kneepot’s voltage range. Reset EE_ERROR byte by entering the
calibration routine (refer to section 10.0).
[E12]: Not used in the Model 480
[E13]: EEPROM VARIABLE ALLOCATION ERROR
Error Action: This causes the microcontroller to burn 13 in the EE_ERROR EEPROM.
Display: *****STOP*****
Cause: Each variable, in software, has a predetermined amount of EEP ROM dedicated to it. The
reason being that each byte of EEPROM can be written to only a finite number of times. Upon copying a
variable to EEP ROM the microcontroller checks that the copy matches the original. If it does not match
it goes on to the next byte of EEPROM and tries to write it again. Eventually there may come a time when
the variable runs out of the EEPROM that was allocated for it. This generates an error 13.
Corrective Action: Contact OrthoLogic Customer Service Department and inform them of the error. The
main PCB may need to be replaced. (There is enough EEPROM allocated for each variable to last for
more than a decade of constant use.)
[E14]: EEPROM POINTER ALLOCATION ERROR
Error Action: This causes the microcontroller to burn 14 in the EE_ERROR EEPROM.
Display:*****STOP*****
Cause: Each variable, in software, has a predetermined amount of EEP ROM dedicated to it. The
reason being that each byte of EEPROM can be written to only a finite number of times. Upon copying a
variable to EEP ROM the microcontroller checks that the copy matches the original. If it does not match
an "EEPROM pointer" byte is incremented so the microcontroller is directed to the next byte of EEPROM.
It proceeds to write the variable again. However, if the EEPROM pointer, a byte of EEPROM, can not be
incremented, an error 14 is generated. The variable cannot be written to the EEPROM correctly.
Corrective Action: Contact the Technical Service Department and inform them of the error. The main
PCB may need to be replaced.
[E15]: KNEEPOT WIPER VOLTAGE NOT CHANGING QUICKLY ENOUGH
Error Action: This causes the microcontroller to burn 15 in the EE_ERROR EEPROM and causes the
CPM to stop.
Display: *****STOP*****
Cause: If the CPM is in the run mode and the A/D converter reading doesn’t change by more than two
counts in a short, pre-determined amount of time, an error 15 is generated. The problem could be due to
a faulty kneepot or kneepot cable.
Corrective Action: Check for a faulty kneepot or kneepot cable. Reset EE_ERROR byte by entering the
calibration routine.
[E16]: CONFIGURATION ERROR