-
35
-
(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 lamps. If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop, the trouble
display stops and the air conditioner resumes operation.
(2)
Notes (1) There is no error indicator in the 25 and 35 types.
Notes
(2) The air conditioner cannot be restarted using the remote controller for 3 minutes after operation stops.
Indoor unit display panel
Description
of trouble
Cause
Display (flashing) condition
Run
lamp
Timer
lamp
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 1 minute 50 seconds or longer (during
operation)(the compressor is stopped).
When a heat exchanger sensor wire disconnection is detected while
operation is stopped. (If a temperature of –20ºC 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 –20ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.) (Not displayed
during operation.)
• Defective power supply,
Broken signal wire, defective
in/outdoor unit boards
• Broken heat exchanger sensor
wire, poor connector
connection
• Broken room temperature
sensor wire, poor connector
connection
Error of signal
transmission
Heat exchanger
sensor 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.)
When the value of the discharge pipe sensor exceeds the set value.
(The air conditioner stops.)
• Defective fan motor, poor
connector connection
• Gas shortage, defective
discharge pipe sensor, closed
control valve
Indoor fan motor
error
Over heat of
compressor
When a liquid pipe sensor wire disconnection is detected while
operation is stopped. (If a temperature of –50ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.) (Not displayed
during operation.)
• Broken heat exchanger liquid
pipe sensor wire, poor
connector connection
Outdoor heat
exchanger liquid
pipe sensor error
When an outdoor temperature sensor wire disconnection is detected
while operation is stopped. (If a temperature of –40ºC or lower is
detected for 15 seconds, it is judged that the wire is disconnected.) (Not
displayed during operation.)
• Broken outdoor sensor wire,
poor connector connection
Outdoor
temperature sensor
error
When a compressor discharge pipe sensor wire disconnection is
detected for 15 seconds or longer (less than 7ºC) after the outdoor
unit’s speed has continued at 0 rps or higher for 9 minutes.
(The air conditioner stops.)
• Broken discharge pipe sensor
wire, poor connector
connection
Discharge pipe
sensor error
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
transformer, closed control
valve
Current Cut
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
Outdoor fan motor
error
(25, 35 type only)
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 air conditioner stops.)
• Broken power transistor,
broken compressor wire
• Broken discharge pipe sensor
wire, poor connector
connection
• Compressor blockage
Trouble of outdoor
unit
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
ON
1 time
flash
ON
2 time
flash
ON
ON
6 time
flash
5 time
flash
2 time
flash
Keeps
flashing
4 time
flash
Keeps
flashing
1 time
flash
Keeps
flashing
1 time
flash
ON
7 time
flash
ON
2 time
flash
2 time
flash
2 time
flash
ON
