Toshiba MMU-AP0074YH-E Service Manual page 73

Check code
Outdoor 7-segment display
Sub-code
–
L08
–
L10
L17
–
–
L18
L28
SMMS (Series 1)
01: A3-IPDU1 error
02: A3-IPDU2 error
03: A3-IPDU1/A3-IPDU2 error
04: Fan IPDU error
05: A3-IPDU1
+ Fan IPDU error
06: A3-IPDU2
+ Fan IPDU error
07: All IPDU error
SMMS-i (Series 4)
A3-IPDU Fan A3-IPDU
L29
IPDU
1 2 3 1 2
O O
01 0A
O O O
02 0B
O O O
03 0C
O O O
04 0D
O O O O
05 0E
O O O O O
06 0F
O O O
07
Circle (O):
O Faulty IPDU
08
O O
09
L30 Detected indoor unit No.
P03 –
P0301: Compressor 1
02: Compressor 2
P04
03: Compressor 3
00: Open phase detected
01: Compressor 1
P05
02: Compressor 2
03: Compressor 3
01: Compressor 1
P07
02: Compressor 2
03: Compressor 3
P10
Indoor unit No. detected
P13 –
01: TS condition
P15
02: TD condition
P17 –
P18 –
P19
Outdoor unit No. detected
P20 –
Display of receiving unit
TCC-LINK Indicator light block
central control
or main remote
Operation Timer Ready
controller
display
(L08)
L10
L17
L18
L28
Fan
L29
IPDU
3
O
O
O
O
O
O
(L30)
P04
P05
P07
(P10)
P13
P15
P17
P18
P19
P20
Typical fault site
Flash
SIM Indoor group address not
SIM
set
Outdoor capacity not set
SIM
Outdoor model
SIM
incompatibility error
FS (Flow Selector) unit
SIM
error
Too many outdoor units
SIM
connected
SIM Error in number of IPDUs
Indoor external error input
SIM
(interlock)
Outdoor discharge (TD1)
ALT
temperature error
High-pressure SW
ALT
activation
Open phase / power failure
Inverter DC voltage (Vdc)
ALT
error
MG-CTT error
Heat sink overheating
ALT
error
Indoor unit overflow
ALT
Outdoor liquid backflow
ALT
detection error
Gas leak detection
ALT
Outdoor discharge (TD2)
ALT
temperature error
Outdoor discharge (TD3)
ALT
temperature error
4-way valve reversing
ALT
error
Activation of high-pressure
ALT
protection
– 72 –
Description of error
Address setting has 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 3 series) has been
connected.
Cooling / heating cycle error resulting from piping
error is detected.
More than four outdoor units have been
connected.
There are insufficient number of IPDUs (P.C.
boards) in inverter box.
Indoor unit has been shut down for external error
input in one refrigerant line (detected by indoor
unit).
Outdoor discharge temperature sensor (TD1) has
detected abnormally high temperature.
High-pressure SW was activated.
Open phase is detected when power is turned on.
Inverter DC voltage is too high (overvoltage) or too
low (undervoltage).
Temperature sensor built into IGBT (TH) detects
overheating.
Indoor unit has been shutdown in one refrigerant
line due to detection of overflow (detected by
indoor unit).
State of refrigerant cycle circuit indicates liquid
backflow operation.
Outdoor suction temperature sensor (TS1) detects
sustained and repeated high temperatures that
exceed standard value.
Outdoor discharge temperature sensor (TD2)
detects abnormally high temperature.
Outdoor discharge temperature sensor (TD3)
detects abnormally high temperature.
Abnormality in refrigerating cycle is detected
during heating operation.
High pressure (Pd) sensor detects high pressure
that exceeds standard value.
MG-CTT: Magnet contactor