Toshiba MCY-MHP0404HS(J)-E Service Manual page 111

Check code
Location
Outdoor 7-segment display
Main
remote detection
Check
Sub-code
controller
code
IPDU
F13 F13 –
I/F
F15 F15 –
I/F
F16 F16 –
I/F
F23 F23 –
I/F
F24 F24 –
Indoor
F29 – – unit
I/F
F31 F31 –
IPDU
H01 H01 –
IPDU
H02 H02 –
of Description System status
TH sensor trouble All stop
Outdoor All stop
temperature
sensor wiring
trouble (TE, TL)
Outdoor All stop
pressure sensor
wiring trouble
(PD, PS)
PS sensor trouble All stop
PD sensor trouble All stop
Other indoor Stop of
trouble corresponding
unit
Outdoor All stop
EEPROM trouble
Compressor All stop
breakdown
Compressor All stop
trouble (lockup)
110
121
Check code detection
Check items (locations)
condition(s)
Sensor resistance is zero Trouble in IGBT built-in
(short circuit). temperature sensor
Replace A3-IPDU P.C.
board.
During compressor operation Check installation of TE
in HEAT mode, TE and TL sensors.
continuously provides Check resistance
temperature reading higher characteristics of TE and
than indicated by TL by at TL sensors.
least specified margin for 3 Check for outdoor P.C.
minutes or more. board (I/F) trouble.
Readings of high-pressure Check connection of high-
PD sensor and low-pressure pressure PD sensor
PS sensor are switched. connector.
Output voltages of both Check connection of low-
sensors are zero. pressure PS sensor
connector.
Check for trouble in
pressure sensors PD and
PS.
Check for trouble in outdoor
P.C. board (I/F).
Check for troubled in
compressive output of
compressor.
Check 4-way valve trouble.
Output voltage of PS sensor Check for connection trouble
is zero. involving PS sensor and PD
sensor connectors.
Check connection of PS
sensor connector.
Check for trouble in PS
sensor.
Check for troubled in
compressive output of
compressor.
Check for trouble in 4-way
valve.
Check for trouble in outdoor
P.C. board (I/F).
Check for trouble in SV4
circuit.
Output voltage of PD sensor Check connection of PD
is zero (sensor open- sensor connector.
circuited). Check for trouble in PD
Pd > 4.15 MPa despite sensor.
compressor having been Check for trouble in outdoor
turned off. P.C. board (I/F).
Indoor P.C. board does not Check for trouble in indoor
operate normally. P.C. board (troubled
EEPROM)
Outdoor P.C. board (I/F) Check power supply
does not operate normally. voltage.
Check power supply noise.
Check for trouble in outdoor
P.C. board (I/F).
Inverter current detection Check power supply voltage.
circuit detects overcurrent (AC220-240V ± 10%).
and shuts system down. Check for trouble in
compressor.
Check for possible cause
of abnormal overloading.
Check for trouble in outdoor
P.C. board (A3-IPDU).
Check miswiring,
misinstallation SV5.
Overcurrent is detected Check for trouble in
several seconds after startup compressor.
of inverter compressor. Check power supply voltage.
(AC220-240V ± 10%).
Check compressor system
wiring, particularly for open
phase.
Check connection of
connectors / terminals on
A3-IPDU P.C. board.
Check for trouble in outdoor
P.C. board (A3-IPDU).