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124
I/F
All stop
• Check for defect in outdoor
P.C. board (A3-IPDU).
• Check for defect in outdoor
power supply wiring.
P07
P07
–
IPDU
I/F
Heat sink
overheating
error
All stop
Temperature sensor built into
IGBT (TH) is overheated.
• Check power supply
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 A3-
IPDU.
(faulty IGBT built-in
temperature sensor (TH))
P10
P10
Detected
indoor address
Indoor
unit
Indoor overflow
error
All stop
• Float switch operates.
• Float switch circuit is open-
circuited or disconnected
at connector.
• Check float switch
connector.
• Check operation of drain
pump.
• Check drain pump circuit.
• Check drain pipe for
clogging.
• Check for defect in indoor
P.C. board.
P12
–
–
Indoor
unit
Indoor fan motor
error
Stop of
corresponding
unit
• Motor speed
measurements
continuously deviate from
target value.
• Overcurrent protection is
activated.
• Check connection of fan
connector and wiring.
• Check for defect in fan
motor.
• Check for defect in indoor
P.C. board.
• Check impact of outside air
treatment (OA).
P13
P13
–
I/F
Outdoor liquid
backflow
detection error
All stop
• Check full-close operation
of outdoor PMV.
• Check for defect in Pd or
Ps sensor.
• 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.
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
• Check gas balancing
circuit (SV2) for clogging.
Check code
–
Inverter DC
voltage (Vdc)
error
(compressor)
• Inverter DC voltage is too
high (overvoltage) or too
low (undervoltage).
<During heating operation>
When system is in heating
operation, outdoor PMV 1
continuously registers
opening of 100 p or less while
under SH control.
P05
P05
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