Toshiba SMMS-u MMY-MUP0801HT8 Quick Reference page 32

Check code
Outdoor 7-segment display
Sub-code
01 : TS1 sensor
F12
03 : TS3 sensor
04 TS3 sensor disconnect
F15 –
F16 –
F23 –
F24 –
F31 –
H05 –
H06 –
H07 –
01: TK1 sensor trouble
H08
02: TK2 sensor trouble
H15 –
01: TK1 oil circuit trouble
H16
02: TK2 oil circuit trouble
L04 –
Number of priority indoor units
L06 (check code L05 or L06 depending
on individual unit)
L08 –
L10 –
L17 –
02: Switch setting trouble of
L23
outdoor unit
L28 –
Display of receiving unit
Central Indicator light block
control or main
remote
Operation Timer Ready
controller
display
F12
F15
F16
F23
F24
F31
H05
H06
H07
H08
H15
H16
L04
L05
L06
(L08)
L10
L17
L23
L28
– 32 –
Typical problem site
Flash
• Outdoor suction
temperature sensor
(TS1,TS3) trouble
• When TS3 detects an
ALT unusual temperature
during compressor
operation and PMV4
operation in cooling
mode
Outdoor temperature
ALT sensor (TE1,TL1)
wiring trouble
Outdoor pressure sensor
ALT
(Pd, Ps) wiring trouble
Low pressure sensor (Ps)
ALT
trouble
High pressure sensor (Pd)
ALT
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)
Outdoor discharge
temperature sensor (TD2)
wiring trouble
Oil level detection circuit
trouble
Duplicated outdoor
SIM
refrigerant line address
Duplicated priority indoor
unit (as displayed on
SIM
priority indoor unit)
Duplicated priority indoor
unit (as displayed on
SIM
indoor unit other than
priority indoor unit)
Indoor group address not
SIM
set
Outdoor capacity not set
SIM
Outdoor model
SIM
incompatibility trouble
SIM
SW setting trouble
Too many outdoor units
SIM
connected
Description of problem
• Outdoor suction temperature sensor (TS1,TS3)
has been open/short-circuited.
• When the disconnect of outdoor temperature
sensor (TS3) is detected.
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.
Outd oor EEPROM is failure (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) detects abnormally low oil level.
Temperature sensor for oil level detection
(TK1,TK2) 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) despite compressor having been
started.
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).
Outdoor unit that cannot be connected is
connected.
Switch setting trouble of outdoor units when
HWM (Hot water module) is connected.
More than six outdoor units have been
connected.