When a heat exchanger sensor wire disconnection is detected while operation is
stopped. (If a temperature of –28ºC or lower is detected for 15 seconds, it is
judged that the wire is disconnected.)
(Not displayed during operation.)
When a room temperature sensor wire disconnection is detected while operation
is stopped. (If a temperature of –45ºC or lower is detected for 15 seconds, it is
judged that the wire is disconnected.)
(Not displayed during operation.)
• Broken heat exchanger sensor
wire, poor connector
connection
• Indoor PCB is faulty
• Broken room temperature
sensor wire, poor connector
connection
• Indoor PCB is faulty
When conditions for turning the indoor unit’s fan motor on exist during air
conditioner operation, an indoor unit fan motor speed of 300 min
-1
or lower is
measured for 30 seconds or longer. (The air conditioner stops.)
• Defective fan motor, poor
connector connection
ON
1‐time
flash
ON
2‐time
flash
ON
6‐time
flash
-55℃ or lower is detected for 5 seconds continuously 3 times within 40 minutes
after initial detection of this anomalous temperature.
Or -55℃ or higher is detected for within 20 seconds after power ON.
(The compressor is stopped.)
-55℃ or lower is detected for 5 seconds continuously 3 times within 40 minutes
after initial detection of this anomalous temperature.
Or -55℃ or higher is detected for within 20 seconds after power ON.
(The compressor is stopped.)
-25℃ or lower is detected for 5 seconds continuously 3 times within 40 minutes
after initial detection of this anomalous temperature.
(The compressor is stopped.)
• Broken outdoor air temp.
sensor wire, poor connector
connection
• Outdoor PCB is faulty
1‐time
flash
Keeps
flashing
• Broken heat exchanger sensor
wire, poor connector
connection
• Outdoor PCB is faulty
2‐time
flash
Keeps
flashing
• Broken discharge pipe sensor
wire, poor connector
connection
• Outdoor PCB is faulty
4‐time
flash
Keeps
flashing
The inverter output current (compressor motor current) exceeds the set value
during compressor start.
(The air conditioner stops.)
• Compressor locking, open
phase on compressor output,
shortcircuit on power
transistor, closed service valve
1‐time
flash
ON
When there is an emergency stop caused by trouble in the outdoor unit, or the
input current value is found to be lower than the set value.
(The air conditioner stops.)
When there is an emergency stop caused by trouble in the outdoor unit, or the
input current value is found to be lower than the set value continuously for 3
minutes or longer.
(The compressor is stopped.)
• Broken compressor wire
• Compressor blockage
2‐time
flash
ON
When the value of the discharge pipe sensor exceeds the set value.
(The air conditioner stops.)
• Gas shortage, defective
discharge pipe sensor, closed
service valve
ON
5‐time
flash
6‐time
flash
ON
When there is no signal between the indoor PCB and outdoor PCB for 10 seconds
or longer (when the power is turned on), or when there is no signal for 7 minute
35 seconds or longer (during operation)
(The compressor is stopped).
• Defective power supply,
Broken signal wire, defective
indoor/outdoor PCB
When the value of the outdoor heat exchanger sensor exceeds the set value.
• Overload operation, over charge
• Broken outdoor heat exchange
sensor wire
• Service valve is closed.
Keeps
flashing
ON
5‐time
flash
When the outdoor unit’s fan motor sped continues for 30 seconds or longer at
75 rpm or lower. (3 times) (The air conditioner stops.)
• Defective fan motor, poor
connector connection
7‐time
flash
ON
ON
Indoor unit display section
Cause Display (flashing) condition
RUN
light
TIMER
light
When the compressor command speed is lower than the set value and the current
safe has operated. (The compressor is stopped.)
• Overload operation
• Overcharge
• Compressor locking
3‐time
flash
When the wrong voltage connected for the power supply.
When the outdoor PCB is faulty.
• Defective active filter
ON
• Broken power transistor
Indoor heat exchanger
sensor error
Room
temperature
sensor error
Indoor fan
motor error
When refrigeration cycle system protective control operates.
• Service valve is closed.
• Refrigerant is insufficient
ON
7‐time
flash
Outdoor air
temperature
sensor error
Outdoor heat
exchanger
sensor error
Discharge pipe
sensor error
Current cut
Trouble of
outdoor unit
Over heat of
compressor
Error of signal
transmission
Cooling high
pressure
protection
If the compressor motor’s magnetic pole positions cannot be correctly detected
when the compressor starts.
(The air conditioner stops.)
• Defective compressor
• Open phase on compressor
• Defective outdoor PCB
2‐time
flash
2‐time
flash
Rotor lock
Outdoor fan
motor error
Description
of trouble
Current safe
stop
Active filter
voltage error
Power transistor
error
4‐time
flash
ON
Refrigeration
cycle system
protective
control
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