Check code
Display of receiving unit
Outdoor 7-segment display
Central
control or main
Indicator light block
Typical problem site
Description of problem
remote
Sub-code
controller
Operation Timer Ready Flash
display
01: TS1 sensor
03: TS3 sensor
04: TS3 sensor disconnect
F12
F12
ALT
Outdoor temperature
sensor (TE1,TL1)
wiring trouble
F15
–
F15
ALT
Wiring trouble in outdoor temperature sensors
(TE1,TL1) has been detected.
F16
–
F16
ALT Outdoor pressure sensor
(Pd, Ps) wiring trouble
Wiring trouble in outdoor pressure sensors
(Pd, Ps) has been detected.
F23
–
F23
ALT Low pressure sensor (Ps)
trouble
Output voltage of low pressure sensor (Ps) is zero.
F24
–
F24
ALT High pressure sensor (Pd)
trouble
Output voltage of high pressure sensor (Pd) is zero
or provides abnormal readings when compressors
have been turned off.
Outdoor EEPROM is failure (alarm and shutdown
for header unit and continued operation for follower
unit)
F31
–
F31
SIM Outdoor EEPROM trouble
Outdoor discharge
temperature sensor (TD1)
wiring trouble
Wiring/installation trouble or detachment of
outdoor discharge temperature sensor (TD1)
has been detected.
H05
–
H05
H06
–
H06
Activation of low-pressure
protection
Low pressure (Ps) sensor detects abnormally low
operating pressure.
H07
–
H07
Low oil level protection
Temperature sensor for oil level detection
(TK1,TK2) detects abnormally low oil level.
Trouble in temperature
sensor for oil level
detection
(TK1,TK2)
01: TK1 sensor trouble
02: TK2 sensor trouble
H08
H08
Temperature sensor for oil level detection
(TK1,TK2) has been open/short-circuited.
Outdoor discharge
temperature sensor (TD2)
wiring trouble
Wiring/installation trouble or detachment of
outdoor discharge temperature sensor (TD2) has
been detected.
H15
–
H15
No temperature change is detected by
temperature sensor for oil level detection
(TK1,TK2) despite compressor having been
started.
01: TK1 oil circuit trouble
02: TK2 oil circuit trouble
H16
H16
Oil level detection circuit
trouble
Identical refrigerant line address has been
assigned to outdoor units belonging to different
refrigerant piping systems.
L04
–
L04
Duplicated outdoor
SIM refrigerant line address
Duplicated priority indoor
unit (as displayed on
priority indoor unit)
L05
SIM
More than one indoor unit have been set up as
priority indoor unit.
Number of priority indoor units
(check code L05 or L06 depending
on individual unit)
L06
Duplicated priority indoor
unit (as displayed on
indoor unit other than
priority indoor unit)
L06
SIM
More than one indoor unit have been set up
as priority indoor unit.
L08
–
(L08)
SIM Indoor group address not
set
Address setting have not been performed for one
or more indoor units (also detected at indoor end).
L10
–
L10
SIM Outdoor capacity not set
Outdoor unit capacity has not been set (after P.C.
board replacement).
L17
–
L17
SIM Outdoor model
incompatibility trouble
Outdoor unit that cannot be connected is
connected.
L23 02: Switch setting trouble of
L23
SIM SW setting trouble
Switch setting trouble of outdoor units when
HWM (Hot water module) is connected.
outdoor unit
L28
–
L28
SIM Too many outdoor units
connected
More than six outdoor units have been
connected.
•
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.
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Содержание MMY-MUP0801HT7JP
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