-
284
-
20
[Power transistor thermistor fault] [Only case of 151~251 models]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
1 time flash
Outdoor unit
Is the
power transistor thermistor
connector connected
properly?
NO
YES
Correct it
NO
YES
0
20
40
60
80
100
120
140
160
180
200
Power transistor thermistor (Tho-IPM)
Resistance
-
temperature characteristics
Temperature (
°
C)
Thermistor resistance (k
Ω
)
0
20
40
60
80
100
120
140
Are the power
transistor thermistor
characteristics OK?
Outdoor unit control PCB is
defect Replace it (Power
transistor thermistor input
circuit is defect.)
Power transistor thermistor
is defect Replace it
Error display :
E56
•
Display conditions
The compressor stops when the temperature is -10°C or
lower for 5 seconds between 10 minutes and 10 minutes
20 seconds after the compressor starts. And it will restart
automatically after 3-minute delay.
The error occurs when the condtion happens 3 times within
40 minutes.
21
[Insuffi cient refrigerant amount] [Only case of 151~251, 402~1002 models]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Outdoor unit
Error display :
E57
Is the service valve
opened fully?
Are the
connections of the connectors
to the indoor heat exchanger and
return air thermistor OK?
Are the
characteristics of the indoor
heat exchanger and return air
thermistor OK?
Is the low pressure during
operation normal?
Open it fully
NO
YES
NO
YES
YES
NO
YES
NO
Indoor control PCB is faulty
Replace it
(The indoor heat exchanger
and return air thermistor input
circuits are faulty.)
Correct it
Charge with refrigerant
Indoor heat exchanger and
return air thermistor is
faulty Replace it
5
10
15
0
20
40
60
80
100
Return air thermistor (Th
I
)
I
R1,R2)
Temperature (ºC)
Thermistor resistance (k
Ω)
•
Display conditions
Models
151~251
If insuffi cient refrigerant protection (See page 171) is implemented 3 times within
30 minutes.
Model
402~1002
One minute after the compressor is started, the following conditions are detected and
the compressor is stopped.
•
Indoor heat exchanging temperature (TH
I
-R) _ Indoor inlet air temperature (TH
I
-A)
> _ 4°C, and the status lasts for 1 minute or more.
