H- Technical Troubleshooting Chart - BIO-MED DEVICES CROSSVENT-3+ Operation & Service Manual

IX. MAINTENANCE AND SERVICE- cont.
H H H H - - - - TECHNICAL TROUBLESHOOTING CHART TECHNICAL TROUBLESHOOTING CHART
TECHNICAL TROUBLESHOOTING CHART TECHNICAL TROUBLESHOOTING CHART
NOTE: A performance test should always be completed before proceeding with repairs.
CAUTION: Always follow proper static grounding procedures when removing or replacing
electronic parts, LCD assembly, etc.
SYMPTOM
Audible alarm with no visible
indication
Auto cycling of the ventilator.
Battery low audible and visual
alarm.
Battery will not charge.
External power ok.
No battery operation.
External power failure alarm –
"BATT" flashing.
Ventilator will not power up
from external power. Battery
operation ok.
Ventilator fails key test. All
other functions normal.
Ventilator fails display test.
No Display
POSSIBLE CAUSE
Hardware Failure
Pressure out of calibration.
Pressure Trigger set too low.
Low battery.
Battery open.
Battery internal fuse open due to
heat or short
Battery cable open
D101, D104, DC101 open
Battery not charged.
D103 or DC103 open.
Loss of external power.
AC adaptor defective.
Fuse F101 open.
Defective D101, D104, DC101
Fuse F101 open.
AC adaptor defective.
D101, DC101 or D104 open.
Defective touchscreen.
Bad IC401.
Poor Connection at JTS
Poor connection at JLCD.
Defective LCD.
Defective IC403.
Bad connection at JLCD or JBL
Defective LCD
Defective IC403 or Inverter
CORRECTIVE ACTION
Refer to Appendix E
Re-cal pressure.
Increase Pressure Trigger
setting.
Charge battery.
Replace battery.
Allow to cool or replace battery
Repair cable.
Replace defective part
Charge battery.
Replace D103 or DC103.
Check input mains.
Replace ac adaptor.
Change fuse F101.
Replace defective part
Replace F101.
Replace AC adaptor.
Replace defective part.
Replace touchscreen.
Replace IC401.
Reconnect JTS or return to
factory.
Reconnect JLCD
Replace LCD.
Replace IC403.
Correct connection
Replace LCD
Replace defective part
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