Toshiba MMW-UP0271LQ-E - Page 63

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Check code
Location
of
detection
Description System status
Check code detection
condition(s)
Check items (locations)
• Check for failure in outdoor
P.C. board (I/F).
• Check wiring of outdoor
power supply.
• Check power supply
voltage.
Power detection
trouble / Open
phase detection
/ Power supply
miswiring
I/F00: Power
detection
trouble
01: Open phase
02:
Power supply
miswiring
All stop • Open phase is detected
when power is turned on.
• Inverter DC voltage is too
high (overvoltage) or too
low (undervoltage).
P05 P05
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
Compressor
P.C. board
Compressor
Vdc trouble
1∗: Compressor
1 side
2∗: Compressor
2 side
• Check connection of high-
pressure SW connector.
• Check for failure in Pd
pressure sensor.
• Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
• Check for failure in outdoor
fan.
• Check for failure in outdoor
fan motor.
• Check outdoor PMVs
(PMV1, 2, 3) for clogging.
• Check indoor/outdoor heat
exchangers for clogging.
• Check for short-circuiting of
outdoor suction/discharge
air flows.
• Check for failure in outdoor
P.C. board (I/F).
• Check for trouble in indoor
fan system (possible cause
of air flow reduction).
• Check opening status of
indoor PMV.
• Check indoor-outdoor
communication line for
wiring trouble.
• Check for trouble operation
of check valve in discharge
pipe convergent section.
• Check gas balancing SV4
valve circuit.
• Check for refrigerant
overcharging.
Activation of
high-pressure
SW
I/F01: Compressor
1 side
02: Compressor
2 side
All stop High-pressure SW is
activated.
P04 P04
When external device is
connected:
1) Check for trouble in
external device.
2) Check for trouble in
indoor P.C. board.
When external device is
not connected:
1) Check for trouble in
indoor P.C. board.
Indoor external
interlock
(External
abnormal input)
Indoor unitDetected indoor
address
Stop of
corresponding
unit
• Indoor unit has been shut
down due to external
abnormal input signal.
L30 L30
Check outdoor P.C. board
(I/F).
Extended IC
trouble
I/F Continued
operation
There is part failure in P.C.
board (I/F).
— L31 —
• Check the lock of fan
motor (AC fan).
• Check wiring.
Indoor fan
motor trouble
Indoor unit Stop of
corresponding
unit
P01 — —
• Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
• Check outdoor PMVs
(PMV1, 2, 3, 4) for
clogging.
• Check resistance
characteristics of TD1
sensor.
• Check for insufficiency in
refrigerant quantity.
• Check for failure in 4-way
valve.
• Check for leakage of SV4
circuit.
• Check SV4 circuit (wiring
or installation trouble in
SV41 or SV42).
Discharge
temperature
TD1 trouble
I/F All stop Discharge temperature
(TD1) exceeds 115 ˚C.
P03 P03 —
Indoor unit (including Hot Water Module)