Toshiba MMW-UP0271LQ-E Service Manual page 64

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
1∗: Compressor
1 side
2∗: Compressor
2 side
01: Compressor
1 heat sink
trouble
02: Compressor
2 heat sink
trouble
P07 P07
04: Heat sink
dew
condensation
Detected indoor
address
P10 P10
P11 — —
P12 — —
Location
Description
of
detection
Compressor Heat sink
P.C. board overheating
trouble
I/F Heat sink
overheating
trouble
Heat sink dew
condensation
trouble
Indoor unit Indoor overflow
trouble
I/F Outdoor heat
exchanger
freeze trouble
Indoor unit Indoor fan
motor trouble
Indoor unit (including Hot Water Module)
Check code detection
System status
condition(s)
All stop Temperature sensor built
into IPM (TH) is overheated.
All stop Condensation detection on
heat sink has occurred four
times or more in operation.
Temperature sensor built
into IPM (TH) is overheated.
All stop • Float switch operates.
• Float switch circuit is
open-circuited or
disconnected at connector.
All stop • Outdoor heat exchanger
remaining frost detection
has occurred eight times
or more due to abnormal
frost formation in heating
operation.
Stop of • Motor speed
corresponding measurements
unit continuously
deviate from target
value.
• Overcurrent
protection is
activated.
– 64 –
Check items (locations)
• 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))
• 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
• 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.
• 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.
• 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).