Toshiba MMW-AP0271LQ-E Service Manual page 42

Check code
Outdoor 7-segment display
Sub-code
L30 Detected indoor unit No.
P03 —
P0301: Compressor 1
02: Compressor 2
P04
03: Compressor 3
00: Open phase detected
01: Compressor 1 ALT
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 —
01: Compressor 1
F13 02: Compressor 2
03: Compressor 3
01: Compressor 1
H01
02: Compressor 2
03: Compressor 3
01: Compressor 1
H02
02: Compressor 2
03: Compressor 3
01: Compressor 1
H03 02: Compressor 2
03: Compressor 3
01: Compressor 1
P04 02: Compressor 2
03: Compressor 3
P07 —
P20 —
SMMS-i (Series 4)
0..: IGBT circuit
1..: Position detection circuit error
3..: Motor lockup error
4..: Motor current detection
C..: TH sensor error
P22
D..: TH sensor error
E..: Inverter DC voltage error
(outdoor fan)
Note: Although letters 0 to F
appear at locations indicated
by " ", please ignore them.
01: Compressor 1
P26
02: Compressor 2
03: Compressor 3
01: Compressor 1
P29 02: Compressor 2
03: Compressor 3
A01 —
TCC-LINK
central control
Typical fault site
or main remote
controller
display
Indoor external error input
(L30)
(interlock)
Outdoor discharge (TD1)
temperature error
High-pressure SW
P04
activation
Open phase / power failure
P05
Inverter DC voltage (Vdc) error
MG-CTT error
P07 Heat sink overheating error
(P10) Indoor unit overflow
Outdoor liquid backflow detection
P13
error
P15 Gas leak detection
Outdoor discharge (TD2)
P17
temperature error
Outdoor discharge (TD3)
P18
temperature error
P19 4-way valve reversing error
Activation of high-pressure
P20
protection
Error in temperature sensor built
F13
into indoor IGBT (TH)
H01 Compressor breakdown
H02 Compressor error (lockup)
H03 Current detection circuit error
P04 Activation of high-pressure SW
P07 Heat sink overheating error
High-pressure protection
P20
activation
P22 Outdoor fan IPDU error
Activation of G-Tr (IGBT) short-
P26
circuit protection
Compressor position detection
P29
circuit error
A01 Flow switch protective operation
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.
Temperature sensor built into indoor IGBT (TH) has been open /
short-circuited.
Inverter current (Idc) detection circuit detects overcurrent.
Compressor lockup is detected
Abnormal current is detected while inverter compressor is turned
off.
High-pressure SW is activated.
Temperature sensor built into IGBT (TH) detects overheating.
High-pressure (Pd) sensor detected a value over the criteria.
Outdoor fan IPDU detects error.
Short-circuit protection for compressor motor driver circuit
components is activated (momentary overcurrent).
Compressor motor position detection error is detected.
• Check the pump.
• Check the strainer.
• Check the flow switch.
(Type, directtion of attachment and point of contact)
– 42 –
Indoor unit (including Hot Water Module)
Description of error
MG-CTT: Magnet contactor