Toshiba MCY-MHP0806HT8-C Series Service Manual page 109

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
F13 F13 –
F15 F15 –
F16 F16 –
F23 F23 –
F24 F24 –
F29 – –
F31 F31 –
H01 H01 –
H02 H02 –
Location
of Description System status
detection
IPDU TH sensor trouble All stop
I/F Outdoor All stop
temperature
sensor wiring
trouble (TE, TL1)
I/F Outdoor All stop
pressure sensor
wiring trouble
(PD, PS)
I/F PS sensor trouble All stop
I/F PD sensor trouble All stop
Indoor Other indoor Stop of
unit trouble corresponding
unit
I/F Outdoor All stop
EEPROM trouble
IPDU Compressor All stop
breakdown
IPDU Compressor All stop
trouble (lockup)
Check code detection
condition(s)
Sensor resistance is zero
(short circuit).
During compressor operationn
HEAT mode, TE
continuously provides
temperature reading higher
than indicated by TL1 by at
east specified margin for 3
minutes or more.
Readings of high-pressure
PD sensor and low-pressure
PS sensor are switched.
Output voltages of both
sensors are zero.
Output voltage of PS sensor
is zero.
Output voltage of PD sensor
is zero (sensor open-
circuited).
Pd > 4.15 MPa despite
compressor having been
turned off.
Indoor P.C. board does not
operate normally.
Outdoor P.C. board (I/F)
does not operate normally.
Inverter current detection
circuit detects overcurrent
and shuts system down.
Overcurrent is detected
several seconds after startup
of inverter compressor.
108
121
Check items (locations)
• Trouble in IGBT built-in
temperature sensor
Replace A3-IPDU.
board.
• Check installation of TE
and TL1 sensors.
• Check resistance
characteristics of TE and
TL1 sensors.
• Check for outdoor P.C.
board (I/F) trouble.
• Check connection of high-
pressure PD sensor
connector.
• Check connection of low-
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.
• Check for connection trouble
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.
• Check connection of PD
sensor connector.
• Check for trouble in PD
sensor.
• Check for trouble in outdoor
P.C. board (I/F).
• Check for trouble in indoor
P.C. board (troubled
EEPROM)
• Check power supply
voltage.
• Check power supply noise.
• Check for trouble in outdoor
P.C. board (I/F).
• Check power supply voltage.
(AC380-415V ± 10%)
• 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.
• Check for trouble in
compressor.
• Check power supply voltage.
(AC380-415V ± 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).