Toshiba MCY-MHP0305HT-C Service Manual page 103

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)
error
(compressor)
Heat sink All stop
overheating
error
Indoor overflow All stop
error
Indoor fan motor Stop of
error corresponding
unit
Outdoor liquid All stop
backflow
detection error
102
124
Error detection
Check items (locations)
condition(s)
Inverter DC voltage is too Check for defect in outdoor
high (overvoltage) or too P.C. board (IPDU).
low (undervoltage). Check for defect in outdoor
power supply wiring.
Temperature sensor built into Check power supply
IGBT (TH) is overheated. voltage.
Check outdoor fan system
error.
Check heat sink cooling
duct for clogging.
Check IGBT and heat sink
for thermal performance for
faulty installation.
(e.g. mounting screws and
thermal conductivity)
Check for defect in IPDU.
(faulty 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 defect in indoor
P.C. board.
Motor speed Check connection of fan
measurements connector and wiring.
continuously deviate from Check for defect in fan
target value. motor.
Overcurrent protection is Check for defect 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 defect in Pd or
continuously registers Ps sensor.
opening of 100 p or less while Check gas balancing
under SH control. circuit (SV2) for clogging.
Check defect 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.