Section 15-P.c. Board; Replacing P.c. Board - Invacare Perfecto2IRC5PO2AW Service Manual

SECTION 15—P.C. BOARD

Replacing P.C. Board

To prevent electrical shock, ALWAYS disconnect concentrator from electrical outlet
before servicing.
Follow these pre-cautions to prevent damage to the P.C. boards:
Before handling any P.C. boards, you need to be properly grounded to prevent static
damage to the components of the board. A Static Cuff MUST be worn and properly
grounded using an alligator clip. Electrical conduit or a water pipe is normally sufficient
when a known good ground is not available. Care should be taken to ensure that the
alligator clip contacts with bare metal surface.
When removing quick disconnect terminals, DO NOT pull on wire itself as damage to the
connection may occur. Hold down the P.C. board with one hand and pull upward with
other hand with a slight rocking motion to remove the terminals.
Before installing any P.C. boards, ensure that all insulators are in place.
NOTE: For this procedure, refer to FIGURE 15.1 on page 59.
1. Unplug unit.
2. Remove cabinet. Refer to Removing Cabinet on page 22.
3. Remove control panel. Refer to Removing Control Panel on page 52.
4. Do the following:
A. Disconnect wiring harnesses from PC board.
DO NOT remove oxygen sensor tubing from P.C. board. Remove from regulator ONLY.
DO NOT remove the pressure sensor tubing from P.C. board. Remove from top of
product tank only. Damage to oxygen sensor assembly or pressure sensor could occur. A
faulty sensor may result in improper oxygen delivery and harm to the user.
B. Disconnect pressure sensor tubing from product tank, not P.C. Board.
C. For concentrators that have O2 sensor, disconnect the oxygen sensor tubing from
regulator fitting. Refer to Replacing Regulator on page 47.
5. Remove the two mounting screws on top corners of P.C. board.
6. Position new P.C. board.
Part No 1154245
DANGER
CAUTION
WARNING
57
SECTION 15—P.C. BOARD
Perfecto ™
2