Sharp AE-X26FR-N - Page 38

AYXP26FRN
3 – 17
Indoor
unit in
operation
Outdoor
unit in
complete
shutdown
17 -0 Wires between
units
Serial open-circuit (1) Check the wires between
units.
(1) Connect stable power
supply.
(2) Check voltage between
Nos. 1 and 2 on the
indoor/outdoor unit termi-
nal boards.
(2) Replace the outdoor
unit control PCB
assembly.
Outdoor unit does
not turn on due to
erroneous wiring
(1) Check the wires between
units.
(1) Correct the wiring.
(2) Check the outdoor unit
fuse.
(2) Replace the fuse/out-
door unit control PCB
assembly.
(3) Check 15-V, 13-V and 5-
V voltages on the PWB.
Check resistance
between IPM terminals.
(3) Replace the outdoor
unit control PCB
assembly.
(4) Check pins No. 5 and 7 of
connector CN3 of the out-
door unit fan motor for
short-circuit.
(4) Replace the outdoor
unit fan motor.
(5) Outdoor unit control PCB (5) Replace the outdoor
unit control PCB
board.
18 -0 Serial short-circuit (1) Check the wires between
units.
(1) Correct the wiring.
-1 Serial erroneous wir-
ing
(1) Check the wires between
units.
(1) Correct the wiring.
Indoor/
outdoor
units in
complete
shutdown
19 -0 Indoor unit fan Indoor unit fan error (1) Check the indoor fan
motor for proper rotating
operation.(Check fan
lock.)
(1) Replace the indoor
fan motor.
(2) Check the lead wire of
the indoor fan motor for
open-circuit.
(2) Replace the indoor
fan motor.
(3) Check CN1 of the indoor
unit fan motor for secure
installation.
(3) Correct the installa-
tion of CN1 of the
indoor fan motor.
(4) No abnormality found in
above inspections (1)
through (3).
(4) Replace the indoor
unit control PWB.
Indoor/
outdoor
units in
operation
20 -0 Indoor unit con-
trol PCB
EEPROM data error (EEPROM read data
error)
Replace the indoor
unit control PWB.
Indoor/
outdoor
units in
operation
88 Control and dis-
play PCBs
Communication
error
(1) Check for disconnected
connector between con-
trol PCB and display
PCB, and open-circuit in
lead wires.
(1) Insert connectors cor-
rectly, or replace con-
trol PWB.
(2) Check that control PCB
outputs signals correctly.
(2) Replace control
PWB.
Status of
indoor/
outdoor
units
Indication
by LED1 on
outdoor
unit *2
Malfunction
No. dis-
played on
main unit
display sec-
tion *1
Content of diagnosis Inspection location/method Remedy
Main
cate-
gory
Sub-
cate-
gory
Main category Sub-category