– 49 –
Indoor unit (including Hot Water Module)
F12 F12
• Outdoor suction
temperature sensor
(TS1,TS3) trouble
• When TS3 detects an
unusual temperature
during compressor
operation and PMV4
operation in cooling mode
• Outdoor suction temperature sensor
(TS1,TS3) has been open/short-circuited.
• When the disconnect of outdoor temperature
sensor (TS3) is detected.
–F15 F15
Outdoor temperature
sensor (TE1,TL1)
wiring trouble
Wiring trouble in outdoor temperature sensors
(TE1,TL1) has been detected.
–F16 F16
Outdoor pressure sensor
(Pd, Ps) wiring trouble
Wiring trouble in outdoor pressure sensors
(Pd, Ps) has been detected.
–F23 F23
Low pressure sensor (Ps)
trouble
Output voltage of low pressure sensor (Ps) is zero.
–F24 F24
High pressure sensor (Pd)
trouble
Output voltage of high pressure sensor (Pd) is zero
or provides abnormal readings when compressors
have been turned off.
–F31 F31
Outd
Outdoor EEPROM trouble
oor EEPROM is trouble (alarm and shutdown
for header unit and continued operation for follower
unit)
H05 – H05
Outdoor discharge
temperature sensor (TD1)
wiring trouble
Wiring/installation trouble or detachment of
outdoor discharge temperature sensor (TD1)
has been detected.
H06 – H06
Activation of low-pressure
protection
Low pressure (Ps) sensor detects abnormally low
operating pressure.
H07–H07
Temperature sensor for oil level detection
Low oil level protection
(TK1,TK2) detects abnormally low oil level.
H08
01: TK1 sensor trouble
02: TK2 sensor trouble
H08
Trouble in temperature
sensor for oil level
detection
(TK1,TK2)
Temperature sensor for oil level detection
(TK1,TK2) has been open/short-circuited.
H15 – H15
Outdoor discharge
temperature sensor (TD2)
wiring trouble
Wiring/installation trouble or detachment of
outdoor discharge temperature sensor (TD2) has
been detected.
H16
01: TK1 oil circuit trouble
02: TK2 oil circuit trouble
H16
Oil level detection circuit
trouble
No temperature change is detected by
temperature sensor for oil level detection
(TK1,TK2) despite compressor having been
started.
–L04 L04
L05
L06
Dup
licated outdoor
refrigerant line address
Identical refrigerant line address has been
assigned to outdoor units belonging to different
refrigerant piping systems.
L06
Number of priority indoor units
(check code L05 or L06 depending
on individual unit)
Duplicated priority indoor
unit (as displayed on
priority indoor unit)
More than one indoor unit have been set up as
priority indoor unit.
Duplicated priority indoor
unit (as displayed on
indoor unit other than
priority indoor unit)
More than one indoor unit have been set up
as priority indoor unit.
–
L08 (L08)
Indoor group address not
set
Address setting have not been performed for one
or more indoor units (also detected at indoor end).
–L10
Outdoor unit capacity has not been set (after P.C.
Outdoor capacity not set
board replacement).
–L17
Outd
oor model
incompatibility trouble
Old model outdoor unit has been connected.
–L28
L10
L17
L28
Too many outdoor units
connected
More than three outdoor units have been
connected.
Check code
Typical problem site Description of problem
Outdoor 7-segment display
Central
control or main
remote
controller
display
Sub-code
–F19 F19
Indoor TCJ2 (TF) sensor
trouble
•
Check connection of TCJ2 (TF) sensor connector.
• Check resistance characteristics of TCJ2 (TF)
sensor.
01: TS1 sensor
03: TS3 sensor
04㧦TS3 sensor disconnect
L23
02: Switch setting trouble of
outdoor unit
L23
Switch setting trouble
Switch setting trouble of outdoor units when
HWM (Hot Water module) is connected.
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