A7™ Service Manual 046-006272-00 5 - 15
Repair and Troubleshooting Technical Alarms Check
0x00000004
Position switch where
BFCS ejects is faulty.
1. Restart the machine. If the problem still persists, it belongs to hardware
failure. It may be cable failure or position switch failure where BFCS ejects.
2. If the problem still persists after re-plugging the cable, replace with a new
position switch and return the faulty part to R&D.
0x00000008
Position switch where
BFCS retracts is faulty.
0x00000010
BFCS Three-way valve
failure
1. Alarm mechanism: run BFCS auto selftest. Switch three-way valve to BFCS
limb. The measured flow by total flow sensor is less than 0.2/min.
2. Restart the machine. Conduct BFCS system selftest again. If the problem still
persists, set several O2 flows of around 1LPM under EFCS. Select
[Setup]?[Service]?[Data Monitors]?[Component]?[FCS]. Check if total limb flow is
obviously smaller than O2 limb flow (by more than 0.2LPM). If yes, re-plug the
flow sensor and then confirm if the measured values are consistent.
3. If total limb flow is still obviously smaller than O2 limb flow, replace the O2
flow sensor in the total limb to make the measured values consistent. Then
conduct BFCS system selftest again. If the problem still persists, consider
replacing the three-way valve and return the faulty flow sensor or three-way
valve to R&D.
ID No Cause Solution
To Next Page
Loading...
Need help?
General
