121
F13
F13
–
IPDU
TH sensor trouble
All
stop
Sensor
resistance
is
zero
(short circuit).
Trouble in IGBT built-in
temperature sensor
Replace A3-IPDU P.C.
board.
F15
F15
–
I/F
Outdoor
temperature
sensor wiring
trouble (TE, TL)
All stop
During compressor operation
in HEAT mode, TE
continuously provides
temperature reading higher
than indicated by TL by at
least specified margin for 3
minutes or more.
Check installation of TE
and TL sensors.
Check resistance
characteristics of TE and
TL sensors.
Check for outdoor P.C.
board (I/F) trouble.
F16
F16
–
I/F
Outdoor
pressure sensor
wiring trouble
All stop
Readings of high-pressure
PD sensor and low-pressure
PS sensor are switched.
Output voltages of both
sensors are zero.
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.
F23
F23
–
I/F
PS sensor trouble
All stop
Output voltage of PS sensor
is zero.
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.
F24
F24
–
I/F
PD sensor trouble All stop
Output voltage of PD sensor
is zero (sensor open-
circuited).
Pd > 4.15 MPa despite
compressor having been
turned off.
Check connection of PD
sensor connector.
Check for trouble in PD
sensor.
Check for trouble in outdoor
P.C. board (I/F).
F29
–
–
Indoor
unit
Other indoor
trouble
Stop of
corresponding
unit
Indoor P.C. board does not
operate normally.
Check for trouble in indoor
P.C. board (troubled
EEPROM)
F31
F31
–
I/F
Outdoor
EEPROM trouble
All stop
Outdoor P.C. board (I/F)
does not operate normally.
Check power supply
voltage.
Check power supply noise.
Check for trouble in outdoor
P.C. board (I/F).
IPDU
Compressor
breakdown
All stop
Inverter current detection
circuit detects overcurrent
and shuts system down.
Check power supply voltage.
(AC220-240V ± 10%).
Check for trouble in
compressor.
Check for possible cause
of abnormal overloading.
Check for trouble in outdoor
P.C. board (A3-IPDU).
H02
H02
–
IPDU
Compressor
trouble (lockup)
All stop
Overcurrent is detected
several seconds after startup
of inverter compressor.
Check for trouble in
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).
Location
of
detection
Description
System status
Check code detection
condition(s)
Check items (locations)
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
Check code
Check 4-way valve trouble.
Check miswiring,
misinstallation SV5.
H01
H01
–
(PD, PS)
110
A10-1510.indb 110
A10-1510.indb 110
2016/04/08 17:21:08
2016/04/08 17:21:08
AMP Air Conditioning
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