Toshiba MMY-MAP0726FT2P-UL - Page 153

*1 Total shutdown in case of header unit
Continued operation in case of follower unit
Check code
Location
of
detection
Description
System
status
Check code detection
condition(s)
Check items (locations)
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
F29 – –
Indoor
unit
Other indoor
trouble
Stop of
corresponding
unit
Indoor P.C. board does not
operate normally.
• Check for defect in indoor P.C.
board (faulty EEPROM)
F31 F31 –
I/F Outdoor
EEPROM
trouble
All stop *1 Outdoor P.C. board (I/F)
does not operate normally.
• Check power supply voltage.
• Check power supply noise.
• Check for trouble in outdoor
P.C. board (I/F).
H01 H01
01: Compressor 1 side
02: Compressor 2 side
IPDU Compressor
breakdown
All stop Inverter current detection
circuit detects overcurrent
and shuts system down.
•
•
Check power supply voltage.
(AC208/230V ± 10%).
Check for trouble in
compressor.
• Check for possible cause of
abnormal overloading.
• Check for trouble in outdoor
P.C. board (A3-IPDU).
H02 H02
01: Compressor 1 side
02: Compressor 2 side
IPDU Compressor
trouble (lockup)
All stop Overcurrent is detected
several seconds after
startup of inverter
compressor.
• Check for trouble in
compressor.
• Check power supply voltage.
(AC208/230V ± 10%).
• Check compressor system
wiring, particularly for open
phase.
• Check connection of
connectors/terminals on A3-
IPDU P.C. board.
• Check conductivity of case
heater.
(Check for refrigerant problem
inside compressor.)
• Check for trouble in outdoor
P.C. board (A3-IPDU).
H03 H03
01: Compressor 1 side
02: Compressor 2 side
IPDU Current
detection
circuit trouble
All stop Current flow of at least
specified magnitude is
detected despite inverter
compressor having been
shut turned off.
• Check current detection
circuit wiring.
• Check trouble in outdoor
P.C. board (A3-IPDU).
• Check the External / Current
sensor.
H05 H05 –
I/F TD1 sensor
miswiring
(incomplete
insertion)
All stop Discharge temperature of
compressor 1 (TD1) does
not increase despite
compressor being in
operation.
• Check installation of TD1
sensor.
• Check connection of TD1
sensor connector and wiring.
• Check resistance
characteristics of TD1 sensor.
• Check for trouble in outdoor
P.C. board (I/F).
H06 H06
–
I/F Activation of
low-pressure
protection
All stop Low-pressure Ps sensor
detects operating pressure
lower than 0.02MPa.
• Check service valves to
confirm full opening
(both gas and liquid sides).
• Check outdoor
PMVs for
clogging (PMV1, PMV3).
•
•
Check for trouble in SV2
or SV4 circuits.
Check for trouble in low-
pressure PS sensor.
• Check indoor filter for clogging.
• Check valve opening status of
indoor PMV.
• Check refrigerant piping for
clogging.
• Check operation of outdoor fan
(during heating).
• Check for insufficiency in
refrigerant quantity.
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