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32
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(5) Self-diagnosis table
When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of
display lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the trouble
display stops and the air conditioner resumes operation.
(1)
When a heat exchanger sensor 1 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
1 wire, poor connector
connection
• Broken room temperature
sensor wire, poor connector
connection
Heat exchanger
sensor 1 error
Room
temperature
sensor error
When conditions for turning the indoor unit’s fan motor on exist during
air conditioner operation, an indoor unit fan motor speed of 300 rpm or
lower is measured for 30 seconds or longer. (The air conditioner stops.)
• Defective fan motor, poor
connector connection
Indoor fan
motor error
ON
1 time
flash
ON
2 time
flash
ON
6 time
flash
When an outdoor temperature sensor wire disconnection is detected
while the power is turned on or after the outdoor unit’s speed has
continued at 0rps or higher for 2 minutes. (If a temperature of –55ºC or
lower is detected for 20 seconds, it is judged that wire is disconnected.)
(The compressor is stopped.)
• Broken outdoor air temp.
sensor wire, poor connector
connection
Outdoor air
temperature
sensor error
1 time
flash
Keeps
flashing
When a heat exchanger sensor wire disconnection is detected while the
power is turned on or after the outdoor unit’s speed has continued at
0rps or higher for 2 minutes. (If a temperature of –55ºC or lower is
detected for 20 seconds, it is judged that wire is disconnected.)
(The compressor is stopped.)
• Broken heat exchanger sensor
wire, poor connector
connection
Outdoor heat
exchanger
sensor error
2 time
flash
Keeps
flashing
When a discharge pipe sensor wire disconnection is detected after the
outdoor unit’s speed has continued at 0rps or higher for 10 minutes. (If
a temperature of –25ºC or lower is detected for 20 seconds, it is judged
that wire is disconnected.)
(The compressor is stopped.)
• Broken discharge pipe sensor
wire, poor connector
connection
Discharge pipe
sensor error
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
Current Cut
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 the power transistor is judged breakdown while compressor
starts.
(The compressor is stopped.)
• Broken compressor wire
• Compressor blockage
Trouble of
outdoor unit
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
Over heat of
compressor
ON
5 time
flash
6 time
flash
ON
When there is no signal between the indoor unit’s board and outdoor
unit’s board 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
in/outdoor unit boards
Error of signal
transmission
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 unit boards
Rotor lock
2 time
flash
2 time
flash
When the outdoor unit’s fan motor speed continues for 30 seconds or
longer at 75 rpm or lower. (3 times) (The air conditioner stops.)
• Defective fan motor, poor
connector connection
Outdoor fan
motor error
7 time
flash
ON
Indoor unit display panel
Description
of trouble
Cause Display (flashing) condition
RUN
light
TIMER
light
When the inverter command speed is lower than the set value and the
current safe has operated. (the compressor stops)
• Overload operation
• Overcharge
• Compressor locking
Current safe
stop
3 time
flash
—
—
—
8 time
flash
8 time
flash
8 time
flash
1 time
flash
2 time
flash
5 time
flash
6 time
flash
7 time
flash
ON
The wired remote control wire Y is open. The wired remote control
wires X and Y are reversely connected. Noise is penetrating the wired
remote control lines. The wired remote control or indoor control PCB is
faulty. (The communications circuit is faulty.)
• Broken wired remote control
wire, defective indoor unit
boards
Error of wired
remote control
wiring
—
—
—
3 time
flash
ON
• Broken power transistor
Power
transistor
error
4 time
flash
1 time
flash
ON
Outdoor
unit
LED
When a heat exchanger sensor wire 3 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.)
• Broken heat exchanger sensor
3 wire, poor connector
connection
Heat exchanger
sensor 3 error
ON
3 time
flash
—
E 16
E 38
E 37
E 39
E 42
E 59
E 36
E 5
E 3
E 60
E 47
E 48
E 35
E 1
E 58
E 51
Wired
remote
control
display
When the value of the outdoor heat exchanger sensor exceeds the set
value.
•
Overload operation, overcharge
• Broken outdoor heat exchange
sensor wire
• Closed service valve
Cooling high
pressure
protecton
Keeps
flashing
ON
2 time
flash
When the wrong voltage connected for the power supply.
When the outdoor control PCB is faulty.
• Defective active filter
Active filter
voltage error
ON
5 time
flash
2 time
flash
—
—
—
Notes (1)The air conditioner cannot be restarted using the remote control for 3 minutes after operation stops.
(2)The wired remote control is optional parts.
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