–27–
: Lighting : Flashing : OFF : The air conditioner automatically enters the auto-address setting mode.
ALT: When two LEDs are flashing, they flash alternately. SIM: When two LEDs are flashing, they flash in synchronization.
Receiving unit display OR: Orange GR: Green
P04 ALT
Outdoor unit high-
pressure system
trouble
Outdoor
High-pressure switch --- The IOL was activated or an
trouble was detected in the high-pressure releasing
control using the TE.
Entire
stop
P05 ALT Open phase detected Outdoor
The power wire may be connected incorrectly. Check
open phase and voltages of the power supply.
Entire
stop
P07 ALT Heat sink overheat Outdoor
Abnormal temperature was detected by the temp.
sensor of the IGBT heat sink.
Entire
stop
P10 ALT
Indoor unit water
overflow detected
Indoor
Drain pipe, clogging of drainage, float switch circuit,
indoor P.C. board --- Drainage is out of order or the
float switch was activated.
Entire
stop
P12 ALT
The fan trouble of the
indoor unit
Indoor
Abnormal operation of the indoor fan motor, indoor
P.C. board, or indoor DC fan (over current or lock,
etc.) is detected.
Entire
stop
P15 ALT
Gas leakage
detected
Outdoor
There may be gas leakage from the pipe or
connecting part. Check for gas leakage.
Entire
stop
P19 ALT 4-way valve trouble
Outdoor
(Indoor)
4-way valve, indoor temp. sensors (TC / TCJ) --- An
trouble was detected due to temperature drop of the
indoor unit heat exchanger sensor when heating.
Auto-
reset
P20 ALT
High-pressure
protective operation
Outdoor High-pressure protection
Entire
stop
P22 ALT
Outdoor unit fan
trouble
Outdoor
Outdoor unit fan motor, outdoor unit P.C. board --- An
trouble (overcurrent, locking, etc.) was detected in the
outdoor unit fan drive circuit.
Entire
stop
P26 ALT
Outdoor unit inverter
Idc activated
Outdoor
IGBT, outdoor unit P.C. board, inverter wiring,
compressor --- Short-circuit protection for compressor
drive circuit devices (G-Tr / IGBT) was activated.
Entire
stop
P29 ALT
Outdoor unit position
trouble
Outdoor
Outdoor unit P.C. board, high-pressure switch ---
Compressor motor position trouble was detected.
Entire
stop
P31 ALT
Other indoor unit
trouble
Indoor
Another indoor unit in the group is raising an alarm.
Entire
stop
E03/L07/L03/L08 alarm check locations and trouble
description
Auto-
reset
Wired
remote
controller
display
Wireless remote controller
Sensor block display of
receiving unit
Main defective parts
Judging
device
Parts to be checked / trouble description
Air
conditioner
status
Indication
Operation Timer
Ready
GR GR OR
Flashing
53-EN 54-EN
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