Toshiba MCY-MHP0404HS(J)-E Service Manual page 115

Check code
Location
Outdoor 7-segment display
Main
remote detection
Check
Sub-code
controller
code
I/F
P05 P05
–
IPDU
I/F
P07 P07 –
Detected Indoor
indoor address unit
P10 P10
Indoor
unit
P12 – –
I/F
P13 P13 –
of Description System status
Inverter DC All stop
voltage (Vdc)
trouble
(compressor)
Heat sink All stop
overheating
trouble
Indoor overflow All stop
trouble
Indoor fan motor Stop of
trouble corresponding
unit
Outdoor liquid All stop
backflow
detection trouble
114
124
Check code detection
Check items (locations)
condition(s)
Inverter DC voltage is too
Check for trouble in outdoor
high (overvoltage) or too
P.C. board (A3-IPDU).
low (undervoltage).
Check for trouble in outdoor
power supply wiring.
Temperature sensor built into Check power supply
IGBT (TH) is overheated. voltage.
Check outdoor fan system
trouble.
Check heat sink cooling
duct for clogging.
Check IGBT and heat sink
for thermal performance for
troubled installation.
(e.g. mounting screws and
thermal conductivity)
Check for trouble in A3-
IPDU.
(troubled IGBT built-in
temperature sensor (TH))
Float switch operates. Check float switch
Float switch circuit is open- connector.
circuited or disconnected Check operation of drain
at connector. pump.
Check drain pump circuit.
Check drain pipe for
clogging.
Check for trouble in indoor
P.C. board.
Motor speed Check connection of fan
measurements connector and wiring.
continuously deviate from Check for trouble in fan
target value. motor.
Overcurrent protection is Check for trouble in indoor
activated. P.C. board.
Check impact of outside air
treatment (OA).
<During heating operation> Check full-close operation
When system is in heating of outdoor PMV.
operation, outdoor PMV 1 Check for trouble in PD or
continuously registers PS sensor.
opening of 100 pulse or less Check gas balancing
while under super heat control. circuit (SV2) for clogging.
Check trouble in outdoor
P.C. board (I/F).
Check capillary of oil
separator oil return circuit
for clogging.
Check for leakage of check
valve in discharge pipe
convergent section.