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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
–
AMP Air Conditioning
Location
of
Description
System status
detection
IPDU
TH sensor trouble All stop
I/F
Outdoor
All stop
temperature
sensor wiring
trouble (TE, TL)
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 operation
in HEAT mode, TE
continuously provides
temperature reading higher
than indicated by TL by at
least 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.
110
121
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Check items (locations)
Trouble in IGBT built-in
temperature sensor
Replace A3-IPDU P.C.
board.
Check installation of TE
and TL sensors.
Check resistance
characteristics of TE and
TL 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.
(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).
Check miswiring,
misinstallation SV5.
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).
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Table of Contents
Troubleshooting
