SciCan Statim 2000 - Page 78

Page 76
STAT IM 2000/2000S Service Guide
96-108639 Rev 3.0
3. Troubleshooting Cycle Faults
STATIM 2000/2000S/2000 G4 Service Guide
CF
No.
Unit
type
Software revision
Description of Fault
Probable Cause (or causes) of Fault
S Non
S
1.xx/
2.xx
4.xx 5.xx 6.xx/
7.xx
72
There is a communication error between the microprocessor and the Temperature Adapter
Board (TAB). (Note: Verify that the capacitor C12 was
removed from the main PCB prior to installation
of the TAB when used in conjunction with the
PCB Adapter Controller Rev 2.x, 5.x).
% Check the connection between the
square microprocessor and the Printed
Circuit Board (PCB).
% If an adapter board is used check the
connection between the adapter board
and the PCB. (Look for bent or broken
pins.)
% Verify that Temperature Adapter PCB
(TAB) is properly inserted and secured
on the main Statim PCB.
80
The boiler calibration offset routine is Being executed at the wrong time. This routine
should only run when in Boiler calibration mode.
% This may occur if the microprocessor
operates erratically, due to electrical
noise.
81
The state buffer pointer (print data storage
buffer) is invalid.
% Corruption of pointer is usually due to
electrical noise.
82
The calibration buffer pointer (blr-chm data
storage buffer) is invalid.
% Corruption of pointer is usually due to
electrical noise.
83
The EEPROM SIGNATURE string is corrupted. This 16 byte string is located at 0-$0F in the EEPROM. It should not
change unless the EEPROM gets corrupted.
%
The EEPROM can be corrupted if
electrical noise corrupts pointers and
counters in RAM, or causes other erratic
operation of the microprocessor.
84
The boiler chamber value just calculated is not in the range 8C to FF.
% Bad or miscalibrated temperature
measurement circuitry.
% Thermocouple defective or out of
tolerance.
% The boiler is old or not conditioned
properly.
% Calibration routine is running at the
wrong time due to noise.
85
Unexpected Serial Interrupt
% Interference (electrical noise)