Chapter 5
Diagnostic Mode and Troubleshooting
REF 1029568 Rev B
BiPAP Focus Ventilator Service Manual © Respironics, Inc.
5-9
5.7 Setting Up the
Serial Interface for
DRPT
Follow these steps to connect the ventilator and a service PC to create a
diagnostic report (DRPT):
1. Use the serial cable from communication kit P/N 1039800 to connect
between the PC and BiPAP Focus ventilator. Connect the male end
labeled
Diagnostics
to the back of the ventilator and the female end to
the PC as described in Chapter 6.
2. Power up the ventilator in Diagnostic mode: simultaneously press the
Alarm/Reset
and
Alarm Silence
keys for approximately 15 seconds
while turning ventilator power on.
3. Launch the HyperTerminal program on the PC by clicking
Start >
Programs > Accessories > Communications > HyperTerminal
.
4. Enter a name for the connection (Figure 5-8 shows
BiPAP Focus
),
choose an icon, then click
OK
.
PORLATCH
Status of processor reset due to a drop in the +3.3V rail. This
signal must be primed by software, with the
EXT_WDOG_LATCH_CLR signal. This can be done using the
PORLATCLK diagnostics label in the System Test screen.
1: Loss of +3.3V supply caused last reset.
0: Last reset not caused by loss of +3.3V supply. Probably
caused by watchdog (software reset).
PWRSWMON
Status of user interface STANDBY key monitor.
1: STANDBY key is inactive (released)
0: STANDBY key is active (pressed)
PWRSWLATCH
Status of latched STANDBY key monitor. This signal must be
primed by software with the PWR_SW_CLK signal. This can be
done using the PWRSWCLK diagnostics label in the System
Test screen.
1: STANDBY key has NOT been pressed.
0: STANDBY key has been pressed.
Table 5-1: Sensor Readings Screen (Continued)
Parameter
Description
