Chapter 5
5-18 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A
Diagnostic Mode and Troubleshooting
5 ERR FIQ STACK UNDERFLOW Controller processor detected a stack underflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
6 ERR NEST STACK OVERFLOW Controller processor detected a stack overflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
7 ERR NEST STACK
UNDERFLOW
Controller processor detected a stack underflow.
8 ERR IRQ STACK OVERFLOW Controller processor detected a stack overflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
9 ERR IRQ STACK UNDERFLOW Controller processor detected a stack underflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
10 ERR TMR STACK OVERFLOW Controller processor detected a stack overflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
11 ERR TMR STACK
UNDERFLOW
Controller processor detected a stack underflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
12 ERR SVC STACK OVERFLOW, Controller processor detected a stack overflow.
13 ERR SVC STACK UNDERFLOW Controller processor detected a stack underflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
14 ERR THREAD STACK
OVERFLOW
Controller processor detected a stack overflow.
If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.
15 ERR ARM UNDEFINED
INSTRUCTION EXCEPTION
Controller processor detected an unexpected exception.
If this persists and to multiple resets and the system
declaring a system error because too many errors
occurred in 24 hours, replace the controller PCB.
Significant Event Log: Event IDs (Continued)
Code Short text for code Comment / Corrective Action
Table 5-3: Significant Event Log: Event IDs (Sheet 2 of 22)