Chapter 5
5-16 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A
Diagnostic Mode and Troubleshooting
Significant Event
Codes
The BiPAP Focus Ventilator generates a log of system events, including
settings changes, alarms, and codes that can be used for troubleshooting. If a
ventilator inoperative condition or unexpected reset occurs, the significant
event log includes the ventilator settings, patient data, and alarm conditions
that were in effect.
The significant event log can include at least 200 of the most recent events,
with the most recent events listed first. The ventilator maintains the significant
event log regardless of whether there is power to the ventilator.
The significant event log includes the following information:
1. Event ID: This includes a code and brief text description of the event.
V Out Enable VOUT_EN Option to turn on/off the power out to the TCB.
Reserved for future use. Therefore, the option to control
the power to the UI cannot be changed in software.
If used, the following applies:
HI: Turns on the 18V_Boost out to the Controller Board.
LO: Turns off the 18V_Boost out to the Controller Board.
PWRSWCLK PWR_SW_CLK Clocks the Standby Switch latch.
Lo to Hi: Clocks a '1' to the latch output.
Hi to Lo: No change of state.
PWRTUIOFF PWR_TUI_OFF PWR_TUI_OFF: Control line to switch off the power.
Hi: Clears the latch which removes the 18V_Boost rail
from the system, thereby shutting down power by placing
the unit in Standby mode.
Lo: No change in state
PORLATCLK EXT_WDOG_LATC
H_CLR
Clocks the Power On Reset latch. This can be used to
determine if an external power on reset has occurred due
to the +3.3V rail dropping.
Lo to Hi: No change of state.
Hi to Lo: Clocks a '1' to the latch output.
WDSTROBE WDSTROBE WDSTROBE: External watchdog strobe. Software is
required to apply a high pulse of 50ns minimum duration
at a maximum of every 1.2seconds to avoid the watchdog
resetting the processor.
System Test Defined
Diagnostics
Label Schematic Label Description
Table 5-2: System Test Defined (Sheet 2 of 2)
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