15
English
2
Keep down the ON/OFF button for 5 seconds or longer
in the inspection mode and the above trouble history dis-
appears, after the trouble code goes on and off twice,
followed by the code “00”(normal). The display changes
from the inspection mode to the normal mode.
3
Depending on the model or the conditions, it may carry
out an emergency shut-down.
4
If the HBP (H2P) is off, the branch wiring between each
of the indoor and outdoor units may either be incorrectly
connected or broken. Before taking any of the diagnostic
steps listed above, check the branch wiring.
If the HBP (H2P) is off on an inverter, there is a possibil-
ity that the fuse on the outdoor unit’s PC board is burnt
out.
5
Cut off the power and wait for 5 seconds or longer. Turn
on the power again and see if the LED is in the same
state again.
12-3 Malfunction code
• For places where the error code is left blank, the “
” indi-
cation is not displayed. Though the system continues oper-
ating, be sure to inspect the system and make repairs as
necessary.
• Depending on the type of indoor or outdoor unit, the mal-
function code may or may not be displayed.
Code
Malfunction/Remarks
A1
Indoor unit’s PC board faulty
A3
Drain water level abnormal
A6
Indoor fan motor overloaded, overcurrent or locked
A7
Swing flap motor locked
Only the air flow direction can not be controlled.
AF
Humiditier faulty
AH
Air cleaner faulty
Only the air cleaner does not function.
AJ
Type set improper
Capacity data is wrongly proset. Or there is nothing
programmed in the data hold IC.
C4
Sensor for heat exchanger temperature is fault.
(NOTE 1)
C5
Indoor heat exchanger/evaporation temperature ther-
mistor faulty
(NOTE 1)
C9
Sensor for suction air temperature is fault. (NOTE 1)
CC
Humidity sensor abnormal
CJ
Sensor for remote controller is fault.
The remote controller thermistor does not function,
but the system thermo run is possible.
E0
Action of safety device (outdoor unit)
E1
Outdoor unit’s PC board faulty (outdoor unit)
E3
High pressure abnormal (outdoor unit)
E4
Low pressure abnormal (outdoor unit)
E5
Compressor motor lock malfunction (outdoor unit)
E6
Compressor motor lock by over current (outdoor)
E7
Outdoor fan motor lock malfunction
Outdoor fan motor instantaneous overcurrent mal-
function (outdoor unit)
E9
Electronic expansion valve faulty (outdoor unit)
EA
Cooling/heating switch malfunction (outdoor)
F3
Discharge pipe temperature abnormal (outdoor unit)
H3
High pressure switch faulty (outdoor unit)
H4
Low pressure switch faulty (outdoor unit)
H7
Outdoor fan motor position signal malfunction (out-
door unit)
H9
Outdoor air thermistor faulty (outdoor unit) (NOTE 1)
J1
Pressure sensor system error (batch) (outdoor unit)
J2
Current sensor system malfunction (outdoor unit)
(NOTE 1)
J3
Discharge pipe thermistor faulty (outdoor unit)
(NOTE 1)
J5
Suction pipe thermistor faulty (outdoor unit)
J6
Heat exchanger thermistor faulty (outdoor unit)
(NOTE 1)
J7
Outdoor heat exchanger/evaporation temperature
thermistor faulty (outdoor unit)
(NOTE 1)
J8
Liquid piping temperature sensor system error (out-
door unit)
(NOTE 1)
J9
Gas piping thermistor malfunction (cooling) (outdoor)
JA
Discharge pipe pressure sensor faulty
JC
Suction pipe pressure sensor faulty
L1
Inverter error (outdoor unit)
L3
Reactor thermistor faulty (outdoor unit)
L4
Overheated heat-radiating fin (outdoor unit)
Inverter cooling defect
L5
Instantaneous overcurrent (outdoor unit)
Possible earth fault or short circuit in the compressor
motor
L8
Electric thermal (outdoor unit)
Possible electrical overload in the compressor or cut
line in the compressor motor
L9
Stall prevention (outdoor unit)
Compressor possibly locked
LC
Transmission malfunction between the outdoor con-
trol units’ inverters (outdoor unit)
P1
Open-phase (outdoor unit)
P3
PC board temperature sensor malfunction (outdoor
unit)
P4
Heat-radiating fin temperature sensor malfunction
(outdoor unit)
(NOTE 1)
P6
DC output current sensor system malfunction (out-
door unit)
PJ
Type set improper (outdoor unit)
Capacity data is wrongly proset. Or there is nothing
programmed in the data hold IC.
U0
Suction pipe temperature abnormal
(NOTE 1)
U1
Reverse phase
Reverse two phase of the L1,L2and L3 leads.
U2
Power source voltage malfunction (outdoor unit)
Includes the defect in K1M.
(NOTE 1)
U4
UF
Transmission error (indoor unit – outdoor unit)
Wrong wiring between indoor and outdoor units or
malfunction of the PC board mounted on the indoor
and the outdoor units.
If UF is shown, the wiring between the indoor and out-
door units is not properly wired. Therefore, immedi-
ately disconnect the power supply and correct the
wiring. (The compressor and the fan mounted on the
outdoor unit may start operation independent of the
remote controller operation.)
U5
Transmission error (indoor unit – remote controller)
Transmission is improper between the indoor unit and
the remote controller.
U8
Malfunction in transmission between main and sub
remote controls.
(Malfunction in sub remote control.)
UA
Miss setting for multi system
Setting is wrong for selector switch of multi-system.
(See switch SS2 on the main unit’s PC board.)
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