Toshiba MMD-AP0076BHPUL Service Manual page 75

Check code
Outdoor 7-segment display
Main
remote
Check
controller Sub-code
code
SMMS (Series 1)
01: Open phase
detected
02: Phase
sequence error
P05 P05 SMMS-i
(Series 4)
00:
01: Compressor
1 side
02: Compressor
2 side
03: Compressor
3 side
01: Compressor
1 side
02: Compressor
2 side
03: Compressor
3 side
P07 P07
Detected indoor
address
P10 P10
P12
Location
Description
of
detection
I/F Open phase detected,
Phase sequence error
I/F Detection of open
phase / phase
sequence
Inverter DC voltage
(Vdc) error
(compressor)
MG-CTT error
IPDU Heat sink overheating
I/F error
Indoor Indoor overflow error
unit
Indoor Indoor fan motor error
unit
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Error detection
System status
condition(s)
All stop Phase sequence
error was detected
when the power is
turned on.
Open phase error
was detected
when the power is
turned on.
All stop Open phase is
detected when
power is turned
on.
Inverter DC
voltage is too high
(overvoltage) or
too low
(undervoltage).
All stop Temperature sensor
built into IGBT (TH)
is overheated.
All stop Float switch
operates.
Float switch circuit
is open-circuited
or disconnected at
connector.
Stop of Motor speed
corresponding measurements
unit continuously
deviate from target
value.
Overcurrent
protection is
activated.
Check items (locations)
Check the phase sequence of
outdoor power wiring.
Check the outdoor PC board
(I/F) error.
Check for defect in outdoor
P.C. board (I/F).
Check power supply voltage.
Check outdoor fan system
error.
Check heat sink cooling duct
for clogging.
Check IGBT and heat sink for
thermal performance for faulty
installation.
(e.g. mounting screws and
thermal conductivity)
Check for defect in A3-IPDU.
(faulty IGBT built-in
temperature sensor (TH))
Check float switch connector.
Check operation of drain
pump.
Check drain pump circuit.
Check drain pipe for clogging.
Check for defect in indoor
P.C. board.
Check connection of fan
connector and wiring.
Check for defect in fan motor.
Check for defect in indoor
P.C. board.
Check impact of outside air
treatment (OA).
Check static pressure setting.
MG-CTT: Magnet contactor