AEX12GRN
3 – 16
Indoor/
outdoor
units in
complete
shutdown
9 times 9 -0 Outdoor unit
cooling/heating
switchover
Thermistor installa-
tion error or 4-way
valve error
(1) Check to make sure out-
door unit thermistor TH2
(heat exchanger) and TH5
(2-way valve) are installed
in correct positions.
(1) Correct the installa-
tion.
(2) Measure resistance of
thermistors TH1 and TH5.
(2) Replace the ther-
mistor assembly.
(3) Check the 4-way valve for
proper operation.
(3) Replace the 4-way
valve.
(4) No abnormality found in
above inspections (1)
through (3).
(4) Replace the outdoor
unit control PWB
assembly.
-3 Torque control error (1) Check if the refrigerant
volume is abnormally low.
(1) Change the specified
amount of refrigerant.
(2) Check the 4-way valve for
proper operation.
(2) Replace the 4-way
valve.
(3) check to see compressor
type is correct.
(3) Replace the compres-
sor with the correct
part.
-4 Refigerant leak error (1) Check if the position of the (1) Correct the position of
(detection of Refrige evaporator thermistor and these thermistors.
rant Leakage) the room thermistor in
indoor unit is right.
(2) Check if the refrigerant is (2) Fill the refrigerant of
filled. the dlcided amount.
Indoor/
outdoor
units in
complete
shutdown
11
times
11 -0 Outdoor unit DC
fan
Outdoor unit DC fan
rotation error
(1) Check connector CN3 of
the outdoor unit DC fan
motor for secure installa-
tion.
(1) Correct the installa-
tion.
(2) Check the outdoor unit fan
motor for proper rotation.
(2) Replace the outdoor
unit fan motor.
(3) Check fuse FU3. (3) Replace the outdoor
unit control PWB
assembly.
(4) Outdoor unit control PWB (4) Replace the outdoor
unit control PWB
assembly.
Indoor/
outdoor
units in
complete
shutdown
13
times
13 -0 DC compressor Compressor startup
error
(1) Check the colors (red,
white, orange) of the com-
pressor cords for proper
connection. (PWB side,
compressor side)
(1) Correct the installa-
tion.
(U: Red, V: White, W:
Orange)
-1 Compressor rota-
tion error
(120° energizing
error)
(2) Check if the IPM terminal
resistance values are uni-
form.
(2) Replace the outdoor
unit control PWB
assembly.
(3) No abnormality found in
above inspections (1) and
(2).
(3) Replace the outdoor
unit control PWB
assembly.
(4) No abnormality found in
above inspections (1)
through (3).
(4) Replace the compres-
sor.
Indoor/
outdoor
units in
complete
shutdown
14
times
14 -0 Outdoor unit
PAM
PAM over voltage
error
Compressor rota-
tion error
(1) Check the AC power sup-
ply voltage for fluctuation.
(1) Connect stable power
supply.
(2) No abnormality found in
above inspection (1).
(2) Replace the outdoor
unit control PWB
assembly.
Indoor/
outdoor
units in
operation
-1 PAM clock error (1) Check the PAM clock for
proper input.
(1) Replace the outdoor
unit control PWB
assembly.
Status of
indoor/
outdoor
units
Indication
by LED1
on out-
door 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
To Next Page
Loading...
Need help?
General
