Sharp AE-X12PSR, Service Manual, Page: 36 / 73

SHARP(CHINA) INVESTMENT CO., LTD
[5] MALFUNCTION (PARTS) CHECK METHOD
1. Procedure for determining defective outdoor unit IPM/compressor
The following flow chart shows a procedure for locating the cause of a malfunction when the compressor does not start up and a DC overcurrent
indication error occurs.
No No
d
Yes Yes
No
Yes
Yes
No
No
Yes
No No
Yes
No
Normal
Use the remote operate
the air conditioner
Compressor starts up
Does indoor unit LED
display error code
N ormal
P9 Does compressor start up
Does the wire
conector right
conect es wire
ag a in
Replace the
inverter PCB
Does low or high press valve
open Open
Operates again after 3 mins
Normal Replace compressor
P0 Does compressor start
Does the wire
conector right
conect es wire
agrin
Check indoor heat excharge
and outdoor heat excharge
Clean indoor heat
excharge or outdoor
Check the refrigerant
amount
Check the installation
condition
Installation again
Replace the inverter PCB
3-8