Service manual
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Status of
indoor/outdoor
units
Indication by
LED1 on
outdoor unit
*2
Indication on indo
or unit
Content of diagno
sis
Inspection location
/method
Remedy
Floor / ceiling
Wall
(Panel)
Wall(Grill)
Lighting pattern a
t the time of timer lamp lighting
Main Sub
Main
for 5 seconds
Main category
Sub category
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Indoor/outdoor
units in
complete
shutdown
DC compressor
Compressor startup err
or
(1)Check the colors (r
ed,white,orange)of the
compressor cords
for proper connection.(PCB side,compressor
side)
(2)Check if the IPM terminal resistance values are
uniform.
(3)No abnormality found in above inspec
tions (1)and (2).
(4)No abnormality found in above inspec
tions (1)through (3).
(1)Correct the installa
tion.
(U:Red,V:White,W:Orange)
(2)Replace the outdoor unit control PCB assembly.
(3)Replace the out
door unit control PCB assembly.
(4)Replace the compressor.
Compressor rotation error
Indoor/outdoor
units in
complete
shutdown
Outdoor unit
active filter
Active filter overvoltage error
(1)Check the AC power supply voltage for fluc
tuation.
(2)No abnormality found in above inspec
tion (1).
(1)Connect stable power supp
ly.
(2)Replace the outdoor unit control PCB assembly.
Clock error
(1)Check the clock for proper
inputt
(1)Replace the out
door unit control PCB assembly.
Indoor unit in
operation
Outdoor unit in
complete
shutdown
Wires between
units
Serial open-circui
t
(1)Check the wires between units.
(
2)Check voltage between N and 1
the indoor/outdoor uni
t terminal boards.
(1)Connect stable power supp
ly.
(2)Replace the outdoor unit control PCB assembly.
(1)Check the wires between units.
(2)Check the outdo
or unit fuse.
(3)Check 15-V,13-V and 5-V voltages on the PCB.
Check resistance between IPM terminals.
(4)Check pins No.5
and 8 of connector CN3A o
f the outdoor
unit fan motor for short-circuit.
(5)Outdoor unit cont
rol PCB
(1)Correct the wiri
ng.
(2)Replace the fuse
/outdoor unit control PCB assembly.
(3)Replace the out
door unit control PCB assembly.
(4)Replace the out
door unit fan motor.
(5)Replace the out
door unit control PCB board.
Indoor unit in
operation
Outdoor unit in
complete
shutdown
Wires between
units
Serial short-circuit
(1)Check the wires between units. (1)Correct the wiri
ng.
Serial erroneous wiring
(1)Check the wires between units.
(1)Correct the wiring.
Indoor/outdoor
units in
complete
shutdown
Indoor unit fan Indoor unit fan erro
r (1)Check the indoo
r fan motor for proper rota
ting operation.
(Check fan lock.)
(2)Check the lead wire of the indoor fan moto
r for open-circuit.
(3)Check connector of the indoor unit fan mo
tor for secure installation.
(4)No abnormality found in above inspec
tions (1)through (3).
(1)Replace the indoor fan motor.
(2)Replace the indoor fan motor.
(3)Correct the installation of CN3 of the indoor fan motor.
(4)Replace the indoor unit control PCB.
Indoor/outdoor
units in
operation
Indoor unit
control PCB
EEPROM data error
(EEPROM read data error)
(1)Replace the indoor unit control PCB.
Indoor/outdoor
units in
operation
Drain pump unit Drain pump unit error
(1)Check connector C
N2 and CN10.
(1)Replace the Drain pump unit unit.
(2)Re-insertion of CN2 and CN10.
Flashes in 1-sec intervals (normal) : 1sec ON / 1sec OFF
X :
OFF : Flashes 3 times in 0.2-sec i
ntervals
13 time
14 time
X
X
X
X
X
Outdoor unit does not turn on due to
erroneous wiring