Hitachi RAC-25FXA RAC25FXA User Manual
Product codes
RAC25FXA
14-34
14.8.4 COMMUNICATION ERROR DIAGNOSIS MULTIZONE RAM-90NP5A
SELF-DIAGNOSIS LIGHTING MODE
: LIGHT
: BLINK
: OFF
L
D
3
0
4
0
4
L
D
3
0
5
0
5
L
D
3
0
6
0
6
L
D
3
0
7
0
7
L
D
3
0
8
0
8
SELF DIAGNOSIS
NAME
DETAIL
MAIN CHECK POINT
GRN GRN GRN GRN GRN
2. DURING OPERATION
Communication Error
between Indoor and
Outdoor
between Indoor and
Outdoor
Communication
Error of Indoor 1
When Indoor unit
is not connected,
It blinks similarly.
Not Malfunction.
It blinks similarly.
Not Malfunction.
①Cable is wrongly connected
②Cable is open
③Interface Circuit between Indoor and Outdoor
②Cable is open
③Interface Circuit between Indoor and Outdoor
Unit
Communication
Error of Indoor 2
Communication
Error of Indoor 3
Communication
Error of Indoor 4
Communication
Error of Indoor 5
14.8.5 MONO SPLIT(RAC-18/25/35WPA, RAC-25/35WXA, RAC-25/35FXA)
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.
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)
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
beyond the maximum limit
①Main P.W.B.
②Compressor
②Compressor
2 times
Abnormal low speed rotation
Compressor Rotor position could not
be detected.
①Main P.W.B.
②Compressor
②Compressor
3 times
Switching failure
Switching from low frequency sync
start to position detection operation
failure
failure
①Main P.W.B.
②Compressor
②Compressor
4 times
Overload lower limit cut
Overload protection mechanism is
requesting compressor to run at a
speed lower than the minimum
speed limit
speed lower than the minimum
speed limit
①Outdoor unit is exposed to direct sunlight or
its airflow is blocked.
②Fan motor ③Main PWB
④The Voltage is extremely LOW
④The Voltage is extremely LOW
5 times
OH thermistor temperature rise
OH thermistor detected compressor
overheat
①Leak of refrigerant.
②Compressor
③OH thermistor circuit.
②Compressor
③OH thermistor circuit.
6 times
Thermistor abnormal
Abnormal thermistor value was
detected (Open or Short)
detected (Open or Short)
①Thermistor.
②Connection of thermistor defective.
③Thermistor circuit.
②Connection of thermistor defective.
③Thermistor circuit.
7 times
Acceleration failure
Compressor acceleration was not
more that the minimum speed
setting.
setting.
①Leak of refrigerant.
②Compressor.
②Compressor.
8 times
Communication error
Communication between indoor and
①C-D cable wrongly connected
TIME
SET
VALUE
VALUE
RO
T
AT
IO
N
SPEED
(1)
(2)
(3)
TIME
SET VALUE
(1)
(2)
(3)
RO
T
AT
IO
N
SPEED