Chapter 5
5-8 BiPAP Focus Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev B
Diagnostic Mode and Troubleshooting
VBATT/VTEMP Battery temperature measurement when unit operating on AC.
Battery voltage measurement when operating on battery.
Range (voltage): 624 to 936 counts
Voltage (V) = counts * 0.012817
Range (temperature): 79 to 421 counts (battery temperature
is OK if counts are within limits)
VOptoCap Measurement of backup capacitor voltage on user interface
PCB. Capacitor powers backup alarm for minimum 3 minutes
upon system power failure.
Range: 616 to 782 counts
Voltage(V) = counts * 0.005371
Board Temp Measurement of temperature on the user interface PCB.
Range: 233 to 540 counts
Temperature (
o
C) = ((counts * 0.00244) - 0.6) * 100
Ambient Temp Measurement of ambient temperature within the unit.
Range: 0 to 60
o
C.
+18VINCMP Status of high incoming mains voltage (15.64V typical
threshold).
1: Above threshold
0: Below threshold
+18VBSTCMP Status of high 18V_Boost voltage (15.64V typical threshold).
1: Fault
0: No Fault
BattChrgFault Status of battery charging fault.
1: Fault
0: No Fault
BattOnChrg Status of battery charging.
1: Battery charging
0: Battery not charging
BattChrgToc Status of battery top-off charge.
1: Battery NOT in TOC state
0: Battery in TOC state
BattChrgRdy Status of battery ready to charge.
1: Ready for charging
0: Not ready for charging
Table 5-1: Sensor Readings Screen (Continued)
Parameter Description
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