Toshiba MMD-AP0724H2UL Service Manual page 50
High static ducted type
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Also See for MMD-AP0724H2UL:
- Engineering data book (213 pages) ,
- Wiring diagram (16 pages)
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Outdoor 7-segment display
Sub-code
A3-IPDU Fan
A3-IPDU
Fan
IPDU
IPDU
1 2
3
1 2
3
O
O
O
01
0A
O
O
O
O
02
0B
O
O
O
O
03
0C
L29
O
O
O
O
04
0D
O
O
O
O
O
05
0E
O
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
–
00: Open phase detected
01: Compressor 1
P05
02: Compressor 2
03: Compressor 3
01: Compressor 1
P07
02: Compressor 2
03: Compressor 3
P13
–
01: TS condition
P15
02: TD condition
P17
–
P18
–
P19 Outdoor unit No. detected
P20
–
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Display of receiving unit
TCC-LINK
Indicator light block
central control
or main remote
Operation Timer Ready
controller
Flash
display
L29
SIM Error in number of IPDUs
(L30)
SIM
P03
ALT
P05
ALT
P07
ALT
P13
ALT
P15
ALT Gas leak detection
P17
ALT
P18
ALT
P19
ALT
P20
ALT
– 50 –
Typical fault site
There are insufficient number of IPDUs (P.C.
boards) in inverter box.
Indoor unit has been shut down for external error
Indoor external error input
input in one refrigerant line (detected by indoor
(interlock)
unit).
Outdoor discharge (TD1)
Outdoor discharge temperature sensor (TD1) has
temperature error
detected abnormally high temperature.
Open phase/power failure
Open phase is detected when power is turned on.
Inverter DC voltage (Vdc)
Inverter DC voltage is too high (overvoltage) or too
error
low (undervoltage).
MG-CTT error
Heat sink overheating
Temperature sensor built into IGBT (TH) detects
error
overheating.
Outdoor liquid backflow
State of refrigerant cycle circuit indicates liquid
detection error
backflow operation.
Outdoor suction temperature sensor (TS1) detects
sustained and repeated high temperatures that
exceed standard value.
Outdoor discharge (TD2)
Outdoor discharge temperature sensor (TD2)
temperature error
detects abnormally high temperature.
Outdoor discharge (TD3)
Outdoor discharge temperature sensor (TD3)
temperature error
detects abnormally high temperature.
4-way valve reversing
Abnormality in refrigerating cycle is detected
error
during heating operation.
Activation of high-pressure
High pressure (Pd) sensor detects high pressure
protection
that exceeds standard value.
Description of error
MG-CTT: Magnet contactor
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