-
274
-
Is the
discharge pipe ther-
mistror characteristics
normal?
YES
NO
NO
YES
Replace the discharge
pipe thermistor.
The outdoor unit control PCB is
faulty. Replace it.
Is the unit
normal?
Anomalous discharge
temperature?
(At cooling/heating
operation)
Does the discharge temperature
control work correctly?
Is there any gap between actual temperature
and sensed temperature by the microcomputer?
Check the unit side.
Check the unit side.
Insufficient refrigerant
Measure and recharge the refrigerant.
Is it the overload operation?
If the discharge pipe temperature exceeds the set
value, the compressor speed is reduced to drop the
discharge pipe temperature.
The speed drop in 1 minute.
Hold
Discharge pipe temperature (˚C)
Temperature [T] (˚C)
Temperature (˚C)
302~602 models
Compressor control
100
105
151~251 models
80
90
Discharge pipe temp. (˚C)
Discharge pipe temp. (˚C)
90
135
110
802, 1002 models
105
Release
Operable
Operable
Protective stop
Protective stop
302~602 models
802, 1002 models
85
115
Discharge pipe temp. (˚C)
Operable
Protective stop
151~251 models
80
105
Set temperature for protective control
• Is the filter clogged?
• Is the heat exchanger dirty or
clogged?
• Is the installation space of indoor/
outdoor unit adequate?
• Is there any short circuit air flow
for indoor/outdoor units?
0
20
40
60
80
100
120
140
160
180
200
0
20
40
60
80
100
120 140
160
Thermistor resistance (k
Ω
)
[T
≤
90
˚C]
Thermistor resistance (k
Ω
)
140
120
100
80
60
40
20
0
0
100
50
5
[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
The error occurs when the discharge temperature exceeds the set
point shown below 2 times within 60 minutes, or continuously for
60 minutes including when the compressor is stopped.
151~251, 302 models
Discharge pipe thermistor (Tho-D)
Resistance-temperature characteristic
s
402~1002 models
Discharge pipe thermistor (Tho-D)
Resistance-temperature characteristics
