User Manual

TROUBLESHOOTING
14-35
9 times
outdoor is interrupted
②Open connection on the C-D cable.
③Interface circuit of indoor/outdoor unit.
Abnormal power voltage Abnormal power source is detected.
①Abnormal power source
②Cable is wrongly connected
③Main P.W.B.
10 times
Fan lock error
Outdoor fan actual rpm could not
reach as per instructed.
①Outdoor fan motor
②Fan motor circuit.
12 times
EEPROM read error
Microcomputer cannot read the data
in EEPROM.
①Main P.W.B.
13 times
Example of blinking (5 times)
14.8.6 MONO SPLIT (RAC-50WXA, RAC-50FXA
SELF-DIAGNOSIS LIGHTING MODE
: LIGHT
: BLINK
: OFF
LD301 LD302 SELF DIAGNOSIS NAME DETAIL MAIN CHECK POINT
1. DURING OPERATION LD303 (RED) LIGHTS.
Normal operation Compressor operation Not malfunction
Overload (1)
The rotation speed is automatically controlled to
protect the compressor in the overload
condition.
This shows an overload but not malfunction.
Overload (2)
Overload (3)
2. DURING STOP
LD303 (RED) GOES OFF.
Normal stop Stopped by Thermostat or Controller NOT MALFUNCTION
Reset stop
Microprocessor was re-booted. (It is
NORMAL when power SW has been
turned ON)
①Main P.W.B.
1 time
Peak current cut
Compressor Peak Current was
beyond the maximum limit
①Main P.W.B.
②Compressor
2 times
Abnormal low speed rotation
Compressor Rotor position could not
be detected.
①Main P.W.B.
②Compressor
3 times
Switching failure
Switching from low frequency sync
start to position detection operation
failure
①Main P.W.B.
②Compressor
4 times
Overload lower limit cut
Overload protection mechanism is
requesting compressor to run at a
speed lower than the minimum
speed limit
①Outdoor unit is exposed to direct sunlight or
its airflow is blocked.
②Fan motor ③Main PWB
④
The Voltage is extremely LOW
5 times
OH thermistor temperature rise
OH thermistor detected compressor
overheat
①Leak of refrigerant.
②Compressor
③OH thermistor circuit.
6 times
Thermistor abnormal
Abnormal thermistor value was
detected (Open or Short)
①Thermistor.
②Connection of thermistor defective.
③Thermistor circuit.
7 times
Acceleration failure
Compressor acceleration was not
more that the minimum speed
setting.
①Leak of refrigerant.
②Compressor.
8 times
Communication error
Communication between indoor and
outdoor is interrupted
①C-D cable wrongly connected
②Open connection on the C-D cable.
③Interface circuit of indoor/outdoor unit.
9 times
Abnormal power voltage Abnormal power source is detected.
①Abnormal power source
②Cable is wrongly connected
③Main P.W.B.
10 times
2SEC
Lights for 0.25 sec at
interval of 0.25 sec
TIME
SET
VALUE
ROTATION SPEED
(1)
(2)
(3)
TIME
SET VALUE
(1)
(2)
(3)
ROTATION
SPEED