Toshiba MMW-AP0481CHQ-E Service Manual page 46

Check code
Outdoor 7-segment display
Sub-code
01: TS1
F12
02: TS2
F15 –
F16 –
F23 –
F24 –
F31 –
H05 –
H06 –
H07 –
01: TK1 sensor trouble
02: TK2 sensor trouble
H08
04: TK4 sensor trouble
05: TK5 sensor trouble
H15 –
01: TK1 oil circuit trouble
02: TK2 oil circuit trouble
H16
04: TK4 oil circuit trouble
05: TK5 oil circuit trouble
J10
Detected indoor unit No.
L04 –
Number of priority indoor units
L06 (check code L05 or L06 depending
on individual unit)
L08 –
L10 –
L12
01 : FS unit (s) installation trouble
L17 –
Detected indoor unit No.
L18
L23
–
01: Duplication of FS units address
L24 02: Indoor units operation mode
priority setting
L28 –
Display of receiving unit
TCC-LINK Indicator light block
central control
or main remote
Operation Timer Ready
controller
display
F12
F15
F16
F23
F24
F31
H05
H06
H07
H08
H15
H16
J10
L04
L05
L06
(L08)
L10
L12
L17
L18
L23
L24
L28
– 46 –
Typical problem site
Flash
Outdoor suction
ALT temperature
sensor (TS1,TS2) trouble
Outdoor temperature
ALT sensor (TE1,TL1)
wiring trouble
Outdoor pressure sensor
ALT
(PD, PS) wiring trouble
Low pressure
ALT
sensor (PS) trouble
High pressure sensor
ALT
(PD) trouble
SIM Outdoor EEPROM trouble
Outdoor discharge
temperature sensor
(TD1) wiring trouble
Activation of low-pressure
protection
Low oil level protection
Trouble in temperature
sensor for oil level
detection
(TK1,TK2,TK4,TK5)
Outdoor discharge
temperature sensor
(TD2) wiring trouble
Oil level detection
circuit trouble
FS unit overflow trouble
Duplicated outdoor
SIM
refrigerant line address
Duplicated priority indoor
SIM unit (as displayed on
priority indoor unit)
Duplicated priority indoor
unit (as displayed on
SIM
indoor unit other than
priority indoor unit)
Indoor group address not
SIM
set
SIM Outdoor capacity not set
FS unit(s) system trouble
Outdoor model
SIM
incompatibility trouble
Cooling/heating selection
SIM
unit trouble
SIM SW setting mistake
FS unit(s) setting trouble
Too many outdoor units
SIM
connected
Description of check code
Outdoor suction temperature sensor
(TS1,TS2) has been open/short-circuited.
Wiring trouble in outdoor temperature
sensors (TE1,TL1) has been detected.
Wiring trouble in outdoor pressure sensors
(PD, PS) has been detected.
Output voltage of low pressure sensor (PS) is zero.
Output voltage of high pressure sensor (PD) is
zero or provides abnormal readings when
compressors have been turned off.
Outdoor EEPROM is troubled (alarm and
shutdown for header unit and continued operation
for follower unit)
Wiring/installation trouble or detachment of
outdoor discharge temperature sensor (TD1)
has been detected.
Low pressure (PS) sensor detects abnormally low
operating pressure.
Temperature sensor for oil level detection
(TK1,TK2,TK4,TK5) detects abnormally low oil
level.
Temperature sensor for oil level detection
(TK1,TK2,TK4,TK5) has been open/short-
circuited.
Wiring/installation trouble or detachment of
outdoor discharge temperature sensor (TD2)
has been detected.
No temperature change is detected by
temperature sensor for oil level detection
(TK1,TK2,TK4,TK5) despite compressor having
been started.
FS unit has been shutdown in one refrigerant line
due to detection of overflow
Identical refrigerant line address has been
assigned to outdoor units belonging to different
refrigerant piping systems.
More than one indoor unit have been set up as
priority indoor unit.
More than one indoor unit have been set up
as priority indoor unit.
Address setting have not been performed for one
or more indoor units (also detected at indoor end).
Outdoor unit capacity has not been set (after P.C.
board replacement).
FS unit(s) outside the application setting
Old model outdoor unit (prior to 6 series) has been
connected.
Cooling/heating cycle trouble resulting from
piping trouble is detected
Bit 3 and 4 of SW17 are turning on.
• FS unit(s) detects address identical to its own.
• Duplicated priority indoor units operation mode.
More than three outdoor units have been
connected.