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12LRN
3 – 16
Indoor unit
operates.
Outdoor unit
does not
operate tem-
porarily.
3-time
Timer (Orange)
3
0
Dry opera-
tion
Temporary stop
due to dehumidi-
fying operation
(Temporary stop for cycle
protection)
-
Operation (Red)
Plasmacluster
(Blue)
Indoor and
outdoor units
do not oper-
ate.
5-time
Timer (Orange)
5
0
Outdoor unit
thermistor
open-circuit
Heat exchanger
thermistor open
circuit error
(1) Check connector of
the outdoor unit ther-
mistor for secure
installation.
(1) Correct the instal-
lation.
Operation (Red)
Plasmacluster
(Blue)
Timer (Orange)
1
Outdoor temper-
ature thermistor
open circuit error
(2) Measure resistance
of outdoor ther-
mistors.
(2) Replace the out-
door unit ther-
mistor assembly.
Operation (Red)
Plasmacluster
(Blue)
Timer (Orange)
2
Suction ther-
mistor open cir-
cuit error
(3) Check the lead wires
of thermistors on the
outdoor unit control
PCB for open-circuit.
(3) Replace the out-
door unit ther-
mistor assembly.
Operation (Red)
Plasmacluster
(Blue)
Timer (Orange)
3
2-way valve ther-
mistor open cir-
cuit error.
(4) (1) (2) (3):Normal
(4) Replace the out-
door unit control
PCB assembly.
Operation (Red)
Plasmacluster
(Blue)
Timer (Orange)
4
Discharge ther-
mistor open cir-
cuit error
Operation (Red)
Plasmacluster
(Blue)
Timer (Orange)
5
Heat sink ther-
mistor open cir-
cuit error
Operation (Red)
Plasmacluster
(Blue)
Indoor and
outdoor units
do not oper-
ate.
6-time
Timer (Orange)
6
0
Outdoor unit
DC Current
DC over current
error
Go to “DC Over Current Error (6-0 error)”.
Operation (Red)
Plasmacluster
(Blue)
Timer (Orange)
1
IPM pin level
error
(1) Check the IPM is
attached correctly to
the outdoor unit IPM
PWB.
(1) Replace the out-
door unit IPM PWB
assembly.
Operation (Red)
Plasmacluster
(Blue)
Indoor and
outdoor units
do not oper-
ate.
7-time
Timer (Orange)
7
0
Outdoor unit
AC Current
AC over current
error
(1) Ensure unob-
structed air flow from
the outdoor unit air
outlet.
(1) Ensure unob-
structed air flow
from the outdoor
unit air outlet.
Operation (Red)
Plasmacluster
(Blue)
(2) Check the outdoor
unit fan motor.
(2) Check the outdoor
unit fan motor.
Timer (Orange)
1
AC current error
when OFF
(1) IPM continuity check (1) Replace the out-
door IPM PWB
Operation (Red)
Plasmacluster
(Blue)
Timer (Orange)
2
AC maximum
current error
(1) Ensure unob-
structed air flow from
the outdoor unit air
outlet.
(1) Ensure unob-
structed air flow
from the outdoor
unit air outlet.
Operation (Red)
Plasmacluster
(Blue)
(2) Check the outdoor
unit fan motor.
(2) Check the outdoor
unit fan motor.
Timer (Orange)
3
AC current defi-
ciency error
(1) Replace the outdoor
unit control PCB
assembly.
(1) Replace the out-
door unit control
PCB assembly.
Operation (Red)
Plasmacluster
(Blue)
(2) Charge the speci-
fied amount of refrig-
erant.
(2) Charge the speci-
fied amount of
refrigerant.
(3) Correct refrigerant
clogs. (Stop valve,
pipe, expansion
valve)
(3) Correct refrigerant
clogs. (Stop valve,
pipe, expansion
valve)
Problem
symptom
Outdoor
unit indi-
cation
(LED1)
Indoor unit
Malfunc-
tion No.
Content of diagnosis
Check point
Action
Lamp
Main Sub
Main
Sub
Summary of Contents for 09LR-N
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