Ventilator & Calibration Troubleshooting
906-0731-04-01 Rev. C ZOLL Ventilator Service Manual 6–11
Troubleshooting — Front Panel
Remote Calibration System
Discrete Tests Test Purpose Troubleshooting
Comm RAM and
Bootloader Check
Verify functionality of EMV COMM interface (RX
& TX signals),
• CPU & RAM function, bootload interface as well
as communication to SPM (SPM RX & TX,
bootselect, reset).
• Replace the front panel assembly kit.
Power Switch Check Verify functionality of Power Switch, each pole
must be checked.
1. Unit fully shuts off with no external power - Off
and No External Power = Pass/Fail.
2. Unit turns on from battery -- On and No
External Power = Pass/Fail.
3. Unit displays proper ON/OFF state with
external power -- On&Off with External Power
• Repeat the test, be sure to unplug the external
power from the 731, not the wall
• Replace the CPU to PIM ribbon cable
• Replace the front panel assembly kit.
EMV Self Check The TCE checks for active alarms on the EMV that
indicate problems with the power system,
communications, or the pulse oximeter.
• Review active service codes refer to the Service
code troubleshooting sheet
• Note service codes expressed by the 731 due to
the presence of a fault condition
• Check all connections.
• Solution: Front panel assembly.
LCD Contrast Set The test reads and confirms contrast adjustability.
• The ribbon cable from the LCD to the button
board may not be seated correctly, try re-seating
the cable
• If these test fail, replace the front panel
assembly kit.
LCD Visual Inspection The test is intended to guide the operator
through the inspection of the LCD to ensure it is
free of defects such as stuck pixels, blemishes,
back light function and contrast.
• Replace the front panel assembly kit.
Button Check Checks the function of each button on the device.
Ensures each button is properly functioning.
• Replace the front panel assembly kit.
Total Power Failure
Alarm Check
This is a test of the power failure circuit, which in
the event of a total power failure will pulse the
buzzer and LED’s to indicate the failure.
120s Total Power Failure alarm triggers (fast beep
and red alarm LED blink pattern) and lasts for at
least 10s.
• Repeat the test, with careful attention to
prompts
• If this test fails Change the front panel assembly
kit
LED Check Verifies the operation of device LEDs. 4 green,
4 yellow, 4 red and 1 IR LED.
• Replace the front panel assembly kit.
Encoder Check The test is to verify the functionality of the rotary
encoder in both directions.
• Replace the front panel assembly kit.
Buzzer Check Verifies the capability of the device to sound
and audible alarm.
• Replace the front panel assembly kit.
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