-
148
-
5
[Cooling overload operation]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Are the
characteristics of the
outdoor heat exchanger thermistor
normal?
NO
NO
Replace the outdoor heat
exchanger thermistor.
Is the unit normal?
Check the unit side.
Compressor stop
Return
Outdoor air temp. (ºC)
YES
The outdoor control PCB
is faulty. Replace
Is there cooling overload
operation?
Is high pressure control
normal?
Abnormal temperature detection
Is it (the actual measurement) correct?
NO
48
65
Abnormal Temperature Detection
• Is there a short circuit in the outdoor unit?
• Is the installation space proper?
• Is the refrigerant level too high?
• Is the heat exchanger dirty or clogged?
Temperature (
°
C)
15
10
5
0
10
30
40
20
50
5k
Ω
at 25
°
C
Outdoor unit heat exchanger
thermistor (Tho-R)
Resistancetemperature characteristics
Resistance
(k
Ω
)
Error display :
e35
●
Display Conditions
If the outdoor heat exchanger temperature becomes 65ºC
5 times within 60 minutes, including while the compres-
sor is stopped, or if it continues at that temperature for 10
minutes or longer.
Is the
discharge pipe ther-
mistror characteristics
normal?
YES
NO
NO
NO
Discharge pipe thermis-
tor replacement
Defective outdoor unit PCB
Replacement
Is the unit
normalized
Discharge
temperature error?
(At cooling/heating
operation)
Is discharge temperature
control normal?
Abnormal temperature sensed
Is the (actual measurement) normal?
Check the unit side.
Check the unit side.
Insufficient refrigerant
Charge the refrigerant (measure)
Is it the oveload operation?
During cooling: Is FM
0
operating?
During heating: Is FM
1
operating?
Are service valves (both liquid,
gas) fully opened during both
cooling and heating.
Is the installation space of indoor/
outdoor unit adequate?
Is there any short circuit air flow
for indoor/outdoor units?
Temperature [T] (
°
C)
Compressor
operation
Compressor
operation
Compressor stop
Compressor stop
100
50
0
10
5
0
0
50
80
100
FDCA301~601 type
FDCA801, 1001 type
Thermistor resistance
(k
Ω
)
[T
>
80
°
C]
Temperature-resistance characteristics
of discharge pipe thermistor (Tho-D)
90
135
Abnormal Temperature Detection
T >80˚C
T< 80˚C
Discharge pipe temp. (
°
C)
Discharge pipe temp. (
°
C)
80
121
6
[Discharge temperature error]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Error display :
e36
●
Display conditions
If the discharge temperature is as shown at left 5 times within 60 minutes, or
continuously for 60 minutes, including when the compressor is stopped.