Toshiba MCY-MHP0404HS-E Service Manual page 115

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