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Concealed Duct High Static Pressure
Installation Manual
EN
: The air conditioner automatically enters the auto-address setting mode.
L20 LAN communication error
Network
adapter central
control
Address setting, central control remote controller, network adapter ---
Duplication of address in central control communication
Auto-reset
L29 Other outdoor unit error Outdoor
Other outdoor unit error Entire stop
1) Communication error between IPDU MCU and CDB MCU
Entire stop
2) Abnormal temperature was detected by the heat sink temp. sensor
in IGBT.
L30
Abnormal external input into
indoor unit (interlock)
Indoor
External devices, outdoor unit P.C. board --- Abnormal stop due to
incorrect external input into CN80
Entire stop
L31 Phase sequence error, etc. Outdoor
Power supply phase sequence, outdoor unit P.C. board --- Abnormal
phase sequence of the 3-phase power supply
Operation
continued
(thermostat
OFF)
P01 Indoor unit fan error Indoor
Indoor fan motor, indoor P.C. board --- Indoor AC fan error (fan motor
thermal relay activated) was detected.
Entire stop
P03
Outdoor unit discharge temp.
error
Outdoor An error was detected in the discharge temp. releasing control. Entire stop
P04
Outdoor unit high-pressure
system error
Outdoor
High-pressure switch --- The IOL was activated or an error was
detected in the high-pressure releasing control using the TE.
Entire stop
P05 Open phase detected Outdoor
The power supply wire may be connected incorrectly. Check open
phase and voltages of the power supply.
Entire stop
P07 Heat sink overheat Outdoor
Abnormal temperature was detected by the temp. sensor of the IGBT
heat sink.
Entire stop
P10
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
P15 Gas leakage detected Outdoor
There may be gas leakage from the pipe or connecting part. Check for
gas leakage.
Entire stop
P19 4-way valve error
Outdoor
(Indoor)
4-way valve, indoor temp. sensors (TC/TCJ) --- An error was detected
due to temperature drop of the indoor unit heat exchanger sensor
when heating.
Auto-reset
(Auto-reset)
P20
High-pressure protective
operation
Outdoor High-pressure protection Entire stop
P22 Outdoor unit fan error Outdoor
Outdoor unit fan motor, outdoor unit P.C. board --- An error
(overcurrent, locking, etc.) was detected in the outdoor unit fan drive
circuit.
Entire stop
P26
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 Outdoor unit position error Outdoor
Outdoor unit P.C. board, high-pressure switch --- Compressor motor
position error was detected.
Entire stop
P31 Other indoor unit error Indoor
Another indoor unit in the group is raising an alarm. Entire stop
E03/L07/L03/L08 alarm check locations and error description Auto-reset
Wired remote
controller
display
Main defective parts Judging device Parts to be checked / error description
Air conditioner
status
Indication
40-EN