53
Part No. 6-847703-00 Rev. C00
The following procedure describes process of
replacing manifold's electronic control circuit
board. If necessary, control board replacement
can be performed while manifold is in service.
However, this should only be done by qualified
technicians experienced in servicing medical
equipment. Repair of control board is not
recommended.
1. Remove two front panel screws A (Figure 24).
Loosen two hinge screws B. Fold front panel
down to service position as shown in Figure
25. Lightly tighten two hinge screws.
2. Disconnect power supply connector from
bottom of manifold cabinet.
3. Note location and circuit board terminal
number of each wire. Mark each wire if
necessary.
4. Using small blade screwdriver, remove each
wire from control board terminals.
5. Remove four control board screws. Note
orientation of old control board and remove
from manifold.
6. Install new control board and secure with four
screws.
7. Connect each wire to appropriate terminal.
Refer to wiring diagram, Figure 27 for wire
locations.
8. Loosen front panel hinge screws and return
front panel to upright position. Reinstall two
front panel screws and tighten hinge screws.
9. Reconnect power supply connector to bottom
of manifold cabinet.
10. Verify correct operation of new control board
by performing Performance Verification.
Control Board Replacement
Service Procedures
Reserve Low Switch Replacement
The following procedure describes process of
replacing high-pressure reserve header reserve
low switch. If necessary, reserve low switch
replacement can be performed while manifold is in
service. However, this should only be done by
qualified technicians experienced in servicing
medical equipment. Refer to Figure 21 for
component identification.
1. Close all high-pressure cylinders connected to
reserve header.
2. Disconnect reserve low switch wires from
electrical junction box. Disconnect any
conduit connected to switch.
3. Vent pressure from reserve header by
loosening zero clearance o-ring sealed union
on output side of reserve header regulator.
4. After all pressure has been vented, remove
reserve low pressure switch from elbow fitting
on regulator body.
5. Using Teflon tape, reinstall reserve low
pressure switch. Tighten switch so that switch
adjustment opening (Figure 26) is facing
outward.
6. Reconnect reserve low switch electrical
conduit and wiring.
7. Tighten zero clearance union on output of
regulator.
8. Slowly open high-pressure cylinders
connected to reserve header.
9. Adjust pressure switch per reserve low switch
adjustment procedure in this manual.
10. Check all joints for leaks using an oxygen
compatible leak detector solution.
