IVT AE-X12GR-N Service Manual page 36

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