Power-up sequence
The system performs a power-on self test (POST) each time the device is powered on.
During power up, the system performs a comprehensive self test of the software. If
software testing is successful, the system then tests internal hardware. If all tests are
successful, the system completes power up and the Home screen appears.
To perform the POST:
1. Disconnect any patient cables connected to the system.
2. Insert a fully charged battery into the system.
3. Upon each power up, confirm the following:
a. The light bar flashes amber.
b. The Welch Allyn startup screen appears.
c. A beep sounds, followed by one chime.
Note If no chimes sound, replace the speaker as specified in
“Remove the speaker.”
d. The product line logo appears at the bottom of the screen.
e. If a printer is installed, the paper advances slightly.
f. The Home screen appears.
WARNING Equipment failure risk. The system includes a fan that
circulates air through the device. If the fan does not run when you power
up the device, remove it from use and inform qualified service personnel
immediately. Do not use the system until the problem is corrected.
If the internal self-check is successful, the system shows its normal functions with all
values blank and the system is ready for operation. If the self-check fails, an error
message appears in the system status area at the top of the screen. If a fault that could
adversely affect the product is detected, the system enters a safe mode and stops
monitoring patients. The system remains in safe mode until it is turned off by pressing
the Power button or until it shuts down automatically after a period of inactivity.
If a system error is detected, the system becomes inactive until you press or until
the system shuts down automatically. The system displays a system fault message that
contains a wrench icon( ) and a system fault code to aid service personnel and
engineers in diagnosing the problem.
While in safe mode, the red LED bar and the piezo buzzer cycle on and off.
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