Toshiba MMD-AP0481HF2UL Service Manual page 55

Check code
Outdoor 7-segment display
Sub-code
01: TG1
F09
02: TG2
01: T S1
F 1 2
03: TS3
F 1 5 –
F 1 6 –
F 2 3 –
F 2 4 –
F 3 1 –
H05 –
H06 –
H 0 7 –
01: TK1 sensor trouble
02: TK2 sensor trouble
H08
03: TK3 sensor trouble
04: TK4 sensor trouble
05: TK5 sensor trouble
H15 –
01: TK1 sensor trouble
02: TK2 sensor trouble
H16
03: TK3 sensor trouble
04: TK4 sensor trouble
05: TK5 sensor trouble
H25 –
L 0 4 –
Number of priority indoor units
L06 (check code L05 or L06 depending
on individual unit)
L 0 8 –
L 1 0 –
L 1 7 –
L23 –
L 2 8 –
Display of receiving unit
TCC-LINK Indicator light block
central control
or main remote
Operation Timer Ready
control
display
F09
F 1 2
F 1 5
F 1 6
F 2 3
F 2 4
F 3 1
H05
H06
H 0 7
H08
H15
H16
H25
L 0 4
L 0 5
L 0 6
L ( 0 ) 8
L 1 0
L 1 7
L23
L 2 8
– 55 –
Typical problem site
Flash
Outdoor heat exchanger
ALT gas side temperature
sensor (TG1, TG2) trouble
Outdoor suction
A L T temperature sensor
(TS1,TS3) trouble
Outdoor temperature
A L T sensor (TE1,TL1)
wiring trouble
Outdoor pressure sensor
A L T
(Pd, Ps) wiring trouble
Low pressure sensor (Ps)
A L T
trouble
High pressure sensor (Pd)
A L T
trouble
I S M Outdooe EEPROM trouble
Outdoor discharge
temperature sensor (TD1)
wiring trouble
Activation of low-pressure
protectio
L o w l i o e l v l e p o r e t t c o i n
Trouble in temperature
sensor for oil level
detection (TK1-TK5)
Outdoor discharge
temperature sensor (TD2)
wiring trouble
Oil level detection circuit
trouble
Outdoor discharge
temperature sensor (TD3)
wiring trouble
Duplicated outdoor
I S M
refrigerant line address
Duplicated priority indoor
I S M unit (as displayed on
priority indoor unit)
Duplicated priority indoor
unit (as displayed on
I S M
indoor unit other than
priority indoor unit)
Indoor group address not
I S M
set
I S M O u d t o r o c a p a c y t i n t o s t e
Outdoor model
I S M
incompatibility trouble
SIM SW setting mistake
Too many outdoor units
I S M
connected
Description of problem
Outdoor heat exchanger gas side temperature
sensors (TG1, TG2) have been open/
-short circuited.
Outdoor suction temperature sensor
(TS1,TS3) 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 faulty (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-TK5) detects abnormally low oil level.
Temperature sensor for oil level detection
(TK1-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-TK5) despite compressor having been
started.
Wiring/installation trouble or detachment of
outdoor discharge temperature sensor (TD3) has
been detected.
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).
Old model outdoor unit (prior to 4 series) has been
connected.
Bit 3 and 4 of SW17 are turning on.
More than three outdoor units have been
connected.