-
110
-
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?
If the discharge pipe temperature exceeds the set value,
the compressor speed is controlled to suppress the rise in
the discharge pipe temperature.
The speed drop in 1 minute.
Hold
Discharge pipe temperature (
°
C)
Temperature [T] (
°
C)
Compressor control
100
105
Discharge pipe temp. (˚C)
Release
Operoble
Error stop
Thermistor resistance (k
Ω
)
85
115
Abnormal temperature detection
• 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?
Temperature-resistance characteristics
of discharge pipe thermistor (Tho-D)
0
20
60
100
140
180
0
20
40
60
80
100
120 140
160
4
[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 2 times within 60
minutes, or continuously for 60 minutes, including when the com-
pressor is stopped.
