Chapter 5
Diagnostic Mode and Troubleshooting
REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-15
System Test The alarm, indicator, and voltage screen (Figure 5-14) allows:
• Test alarms: toggle the primary alarm speaker, backup alarm speaker,
or remote alarm ON or OFF.
• Indicators: toggle the Alarm LED, Silence LED, and the On Battery
LED, ON or OFF.
• Miscellaneous Tests: toggle the following settings ON or OFF:
Blower, VBattMeasEn, V Out Enable, POWERSWCLK, PWRTUIOFF,
PORLATCLK, WDSTROBE.
Figure 5-14: Diagnostic Mode: System Test Screen
NOTE: When the V BattMeasEn signal is asserted is enables the measurement
of the Battery Thermistor temperature on the sensor readings screen.
System Test Defined
Diagnostics
Label Schematic Label Description
BLOWER TCB_SWITCH_ON
and
TCB_SWITCH_OFF
Used to turn blower on/off TCB_SWITCH_ON Hi and
TCB_SWITCH_OFF Lo: Blower ON TCB_SWITCH_ON Lo
and TCB_SWITCH_OFF Hi: Blower OFF
These signals are mutually exclusive in software
V BattMeasEn VBATT_MEAS_EN Selects ADC measurement of battery voltage or battery
temperature
Hi: Battery voltage measured by ADC
Lo: Battery temperature measured by ADC
Table 5-2: System Test Defined (Sheet 1 of 2)
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