Blower Motor Controller Pcb (Original) - Respironics ESPRIT Service Manual

Blower Motor
Controller PCB
(Original)
REF 580-1000-02 G
Follow these steps to remove the original blower motor controller PCB from the
bottom enclosure (Figure 9-83). Reverse to install.
NOTES:
• The original blower motor controller PCB consists of a controller PCB,
a smaller blower lockup PCB, and a bracket.
• When installing the PCB, place onto the threaded studs, then install
the three nuts and washers.
• Tighten all nuts just until firm: do not over-tighten. (No nut is attached
to the bottom rear stud.)
1. Remove top enclosure (see "Top Enclosure" on page 9-4).
2. Remove the enclosure brace.
3. Remove three 5.5-mm nuts and washers holding the blower motor
controller PCB bracket, then partially remove the bracket.
4. Disconnect the wires from the green terminal block (connector J2) on
the large PCB.
5. Disconnect the cables from the blower and sensor PCB harnesses on
the small PCB, then remove the entire bracketed assembly.
J2
Red
Black
Orange
Yellow
Blue
Overcurrent LED
J1
(connects to J1 or
J2 on small PCB)
J3
(connects to J3 or
J4 on small PCB)
Figure 9-83: Original Blower Motor Controller PCB
Esprit® Ventilator Service Manual © Respironics, Inc.
Component Removal/Installation
J1
For blower harness,
J1 and J2 are
interchangeable
J2
J3
For sensor PCB
harness, J3 and J4
are interchangeable
J4
No nut used here
Chapter 9
9-73