– 63 –
Main
remote
control
Check code
H16
H16
01: TK1 oil circuit trouble
02: TK2 oil circuit trouble
04: TK4 oil circuit trouble
05: TK5 oil circuit trouble
I/F
Oil level
detection
circuit trouble
All stop
No temperature change is detected
by TK1 despite compressor 1
having been started.
• Check for disconnection of TK1
sensor.
• Check resistance characteristics
of TK1 sensor.
• Check for connection trouble
involving TK1, TK2, , TK4, and
TK5 sensors
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant entrapment
inside compressor.
No temperature change is detected
by TK2 despite compressor 2
having been started.
• Check for disconnection of TK2
sensor.
• Check resistance characteristics
of TK2 sensor.
• Check for connection trouble
involving TK1, TK2, , TK4, and
TK5 sensors
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant entrapment
inside compressor.
No temperature change is detected
by TK4 despite compressor having
been started.
• Check for disconnection of TK4
sensor.
• Check resistance characteristics
of TK4 sensor.
• Check for connection trouble
involving TK1, TK2, , TK4, and
TK5 sensors
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant entrapment
inside compressor.
No temperature change is detected
by TK4 despite compressor having
been started.
• Check for disconnection of TK5
sensor.
• Check resistance characteristics
of TK5 sensor.
• Check for connection trouble
involving TK1, TK2, , TK4, and
TK5 sensors
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant entrapment
inside compressor.
L02
L02
—
Indoor
unit
Outdoor units
model
disagreement
trouble
Stop of
corresponding
unit
In case of different outdoor unit
(Not corresponded to Air to Air
Heat Exchanger type)
• Check outdoor unit model.
(Check whether the outdoor unit
corresponds to Air to Air Heat
Exchanger type or not.)
L03
—
—
Indoor
unit
Duplicated
indoor header
unit
Stop of
corresponding
unit
There are more than one header
units in group.
• Check indoor addresses.
• Check for any change made to
remote control connection
(group/individual) since indoor
address setting.
L04
L04
—
I/F
Duplicated
outdoor line
address
All stop
There is duplication in line address
setting for outdoor units belonging
to different refrigerant piping
systems.
• Check line addresses.
L05
—
—
I/F
Duplicated
priority indoor
unit (as
displayed on
priority indoor
unit)
All stop
More than one indoor units have
been set up as priority indoor unit.
• Check display on priority indoor
unit.
Outdoor 7-segment display
Check
code
Sub-code
Location
of
detection
Description
System status
Trouble detection
condition(s)
Check items (locations)
L07
—
—
Indoor
unit
Connection of
group control
cable to
standalone
indoor unit
Stop of
corresponding
unit
There is at least one standalone
indoor unit to which group control
cable is connected.
• Check indoor addresses.
L08
L08
—
Indoor
unit
Indoor group /
addresses not
set
Stop of
corresponding
unit
Address setting has not been
performed for indoor units.
• Check indoor addresses.
Note:
This code is displayed when
power is turned on for the first
time after installation.
L06
L06
No. of priority indoor
units
I/F
Duplicated
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
All stop
More than one indoor units have
been set up as priority indoor unit.
• Check displays on priority indoor
unit and outdoor unit.
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