Installation Manual
‒
48
‒
48-EN
Wired
remote
controller
display
Wireless remote controller
Sensor block display of
receiving unit
Main defective parts
Judging
device
Parts to be checked / error description
Air conditioner
status
Indication
Operation Timer
Ready
GR GR OR
Flashing
F10
ALT
Indoor unit room temp.
sensor (TA) error
Indoor
Room temp. sensor (TA), indoor P.C.
board --- Open-circuit or short-circuit of
the room temp. sensor (TA) was detected.
Auto-reset
F12
ALT
TS sensor error
Outdoor
TS sensor may be displaced,
disconnected or short-circuited.
Entire stop
F13
ALT
Heat sink sensor error
Outdoor
Abnormal temperature was detected by
the temp. sensor of the IGBT heat sink.
Entire stop
F15
ALT
Temp. sensor connection
error
Outdoor
Temp. sensor (TE / TS) may be connected
incorrectly.
Entire stop
F29
SIM
Indoor unit, other P.C.
board error
Indoor
Indoor P.C. board --- EEPROM error.
Auto-reset
F31
SIM
Outdoor unit P.C. board
Outdoor
Outdoor P.C. board ---- In the case of
EEPROM error.
Entire stop
H01
Outdoor unit compressor
breakdown
Outdoor
Current detect circuit, power voltage ---
Minimum frequency was reached in the
current releasing control or short-circuit
current (Idc) after direct excitation was
detected.
Entire stop
H02
Outdoor unit compressor
lock
Outdoor
Compressor circuit --- Compressor lock
was detected.
Entire stop
H03
Outdoor unit current
detect circuit error
Outdoor
Current detect circuit, outdoor unit P.C.
board --- Abnormal current was detected
in AC-CT or a phase loss was detected.
Entire stop
H04
Case thermostat
operation
Outdoor
Malfunction of the case thermostat
Entire stop
H06
Outdoor unit low-
pressure system error
Outdoor
Current, high-pressure switch circuit,
outdoor P.C. board --- Pressure sensor
error was detected or low-pressure
protective operation was activated.
Entire stop
L03
SIM
Duplicated header
indoor units
Indoor
Indoor address setting error --- There are
two or more header units in the group.
Entire stop
L07
SIM
Group line in individual
indoor unit
Indoor
Indoor address setting error --- There is
at least one group-connected indoor unit
among individual indoor units.
Entire stop
L08
SIM
Indoor group address
not set
Indoor
Indoor address setting error --- Indoor
address group has not been set.
Entire stop
L09
SIM
Indoor unit capacity not
set
Indoor
Indoor unit capacity has not been set.
Entire stop
L10
SIM
Outdoor unit P.C. board
Outdoor
In the case of outdoor P.C. board jumper
wire (for service) setting error.
Entire stop
L20
SIM
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
SIM
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
SIM
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
SIM
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)
