Toshiba MMW-UP0271LQ-E - Page 64

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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
• Check float switch
connector.
• Check operation of drain
pump.
• Check drain pump circuit.
• Check drain pipe for
clogging.
• Check for failure in indoor
P.C. board.
Indoor overflow
trouble
Indoor unitDetected indoor
address
All stop • Float switch operates.
• Float switch circuit is
open-circuited or
disconnected at connector.
P10 P10
• Check shortage of
refrigerant.
• Check connection of TE1,
TE2 and TE3 sensors.
• Check resistance
characteristics of TE1,
TE2, and TE3 sensors.
• Check disconnection of
TS1 sensor.
• Check resistance
characteristics of TS1
sensor.
• Check outdoor I/F P.C.
board malfunction.
• Check operation of 4 way
valve.
• Check operation of outdoor
PMV (1, 2, 3).
• Check short circuit from
outlet air to inlet air.
Outdoor heat
exchanger
freeze trouble
I/F All stop • Outdoor heat exchanger
remaining frost detection
has occurred eight times
or more due to abnormal
frost formation in heating
operation.
P11 — —
• Check connection of fan
connector and wiring.
• Check for failure in fan
motor.
• Check for failure in indoor
P.C. board.
• Check impact of outside air
treatment (OA).
Indoor fan
motor trouble
Indoor unit Stop of
corresponding
unit
• Motor speed
measurements
continuously
deviate from target
value.
• Overcurrent
protection is
activated.
P12 — —
• Check outdoor fan system
trouble.
• Check IPM and heat sink for
thermal performance for
trouble installation.
(e.g. mounting screws and
thermal conductivity)
• Check for failure in
Compressor P.C. board.
(trouble IPM built-in
temperature sensor (TH))
Heat sink
overheating
trouble
Compressor
P.C. board
1∗: Compressor
1 side
2∗: Compressor
2 side
All stop Temperature sensor built
into IPM (TH) is overheated.
P07 P07
• Check outdoor fan system
trouble.
• Check IPM and heat sink
for thermal performance for
troubled installation.
(e. g. mounting screws and
thermal conductivity)
• Check for failure in
compressor P.C. board.
(failure IPM built-in
temperature sensor (TH))
•
Check shortage of refrigerant.
• Check outdoor service
valves.
• Check connection of TL2
sensor.
• Check resistance
characteristics of TL2 sensor.
• Check resistance
characteristics of TO sensor.
• Check malfunctions of Pd
and Ps sensors.
• Check outdoor I/F P.C.
board malfunction.
• Check PMV2 and PMV3
Heat sink
overheating
trouble
Heat sink dew
condensation
trouble
01: Compressor
1 heat sink
trouble
02: Compressor
2 heat sink
trouble
04: Heat sink
dew
condensation
I/F All stop Condensation detection on
heat sink has occurred four
times or more in operation.
Temperature sensor built
into IPM (TH) is overheated.
Indoor unit (including Hot Water Module)