SLE SLE4000 - Page 145

(Model K) Page 145
10. Symptom: Sub ambient pressure alarm. Alarm Message: Sub
Ambient Pressure.
Possible Cause
Failure of reverse pressure regulator PR3.
Remedy
Replace pressure regulator PR3.
11. Symptom: Controller failure alarm. Alarm Message: Controller Not
Responding. (Displayed below alarm panel).
Possible Cause
Controller services activated from user interface.
Remedy
Turn off the controller services function.
12. Symptom: System fail alarm. Alarm Message: System Fail (Memory
Checksum Error).
Possible Cause
Error in the monitor software.
Remedy
Complete re-calibration of the ventilator monitor/controller subsystems.
13. Symptom: Controller alarm. Alarm Message: Controller Failure.
Possible Cause
Hardware fault in the controller subsystem or fault in the Controller/CAN link.
Fuse F4 on control/monitor board blown.
Remedy
Check the ribbon cables.
Replace the control/monitor board.
Replace fuse F4.