EdgeStar AP550Z Guide

Troubleshooting and reconnecting wires to the “compressor capacitor” on the
AP550Z
Tools required:
Phillips screwdriver
The problem:
If the AP550Z was recently shipped or roughly moved, it may have one of two problems:
•The fan to the interior of the room turns on, but the air blown out of it is room
temperature. Or,
•The unit blows the circuit breaker it is run on
Warnings:
•Make sure the unit is disconnected from the power supply prior to working
on it
•Do not attempt this repair if you do not feel comfortable with any procedures
•If you require any assistance, please call EdgeStar Service at 866-319-5473
The repair:
1. Make sure the unit is unplugged
2. Face the rear of the unit
3. Remove the filter frame:
it
it
Pull up on the
filter frame, then
pull down and
away from the un
to remove

4. Once the filter frame has been removed, remove the lower portion of the
back of the unit:
Once the screws
have been removed,
this portion comes
ri
g
ht off
Remove
these four
screws
5. Now remove the left side of the unit (left, assuming you are facing the rear
of the unit)
Step A.
Remove these two screws from
the rear of the unit

Step C.
Pull the panel down and
off the unit
Step B.
Remove these two
screws.
6. Locate the “compressor capacitor”. It is a silver cylinder that is about 4”
long.
Make sure that the unit is not plugged in prior to touching any wires
Compressor
capacitor

7. Look at the wires going into this capacitor- there should be four wires and
one bare terminal.
A view of the
capacitor from
below
A close-up of the
capacitor

8. If any wires are not connected, connect them. The three blue wires all
connect to one terminal, and the one red wire connects to a terminal all by
itself.
This image shows the
capacitor removed (not a
required step) in order to
show
g
reater detail
Blue wires all
connect here
Red wire
connects here
Bare terminal
9. Finally, put the unit back together by reversing the above instructions.
10. Once the unit is completely reassembled, plug it in. Select the cool mode,
and lower the thermostat settings all the way. The compressor should kick
on after no more than 3 minutes. If so, congratulations on the repair! If
not, call EdgeStar service at 866-319-5473 for further assistance.