AE-X15PU
3 – 14
Indoor and
outdoor
units do not
operate.
5-time O O O O O Timer (Orange) 5 0 Outdoor unit
thermistor
open-circuit
Heat exchanger
thermistor open
circuit error
1) Check connector of
outdoor unit thermistor
for secure installa ion.
2) Measure resistance of
outdoor hermistors
3) Check the lead wires
of hermistors on the
outdoor unit control
PCB for open-circuit.
4) 1) 2) 3):Normal
1) Correct the installa-
ion
2) Replace the outdoor
unit thermistor
assembly.
3) Replace the outdoor
unit thermistor
assembly.
4) Replace the outdoor
unit control PWB
assembly.
O O Operation (
Green
)
Plasmacluster (Blue)
O O O O O Timer (Orange) 1 Outdoor temperature
thermistor open
circuit error
O O Operation (
Green
)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 2 Suction thermistor
open circuit error
O O Operation (
Green
)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 3 Suction thermistor
open circuit error
O O Operation (
Green
)
O O Plasmacluster (Blue)
O O O O O Timer (Orange) 4 Discharge thermistor
open circuit error
O O Operation (
Green
)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 5 Heat sink thermistor
open circuit error
O O Operation (
Green
)
O O Plasmacluster (Blue)
Problem
symptom
Outdoor
unit
indication
(LED1)
Indoor unit
Malfunction
No.*
Content of diagnosis Check point Action
→
Lamp Main Sub Main Sub
Indoor and
outdoor
units do not
operate.
6-time O O O O O Timer (Orange) 6 0 Outdoor unit
DC Current
DC over current
error
Go to “DC Over Current Error (6-0 error)”.
O O Operation (
Green
)
Plasmacluster (Blue)
O O O O O Timer (Orange) 1 IPM pin level error Check the IPM is attached
correctly to the outdoor unit
IPM PWB.
Replace the outdoor
unit IPM PWB
assembly.
O O Operation (
Green
)
O Plasmacluster (Blue)
Indoor and
outdoor
units do not
operate.
7-time O O O O O Timer (Orange) 7 0 Outdoor unit
AC Current
AC over current error 1) Ensure unobstructed air
unit air outlet.
2) Check the outdoor unit
fan motor.
1) Ensure unobstructed
outdoor unit air
outlet.
2) Check the outdoor
unit fan motor.
O O O Operation (
Green
)
Plasmacluster (Blue)
O O O O O Timer (Orange) 1 AC current error
when OFF
1) IPM con inuity check 1) Replace the outdoor
IPM PWB
O O O Operation (
Green
)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 2 AC maximum current
error
1) Ensure unobstructed air
unit air outlet.
2) Check the outdoor unit
fan motor.
1) Ensure unobstructed
outdoor unit air
outlet.
2) Check the outdoor
unit fan motor.
O O O Operation (
Green
)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 3 AC current
1) Replace the outdoor unit
control PCB assembly.
amount of refrigerant.
3) Correct refrigerant clogs.
(Stop valve, pipe,
expansion valve)
1) Replace the outdoor
unit control PCB
assembly.
amount of refriger-
ant.
3) Correct refrigerant
clogs. (Stop valve,
pipe, expansion
valve)
O O O Operation (
Green
)
O O Plasmacluster (Blue)
Indoor and
outdoor
units do not
operate.
8-time O O O O O Timer (Orange) 8 0 Abnormal
wire check
Abnormal wire check
error
1) Check the expansion
valve.
2) Are four expansion
valves connected by
mistake.
3) Check the wiring
between units.
1) Replace the outdoor
control board
assembly.
2) Reattach
3) Check the wiring
between units.
O Operation (
Green
)
Plasmacluster (Blue)
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