-
112
-
7
[Defective discharge pipe thermistor]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Temperature (˚C)
Is the discharge
pipe thermistor
connector connection
OK?
NO
YES
Repair
Are the discharge
pipe thermistor characteristics
OK, is there no
broken wire?
Defective discharge pipe
thermistor Replacement
NO
YES
Defective outdoor unit control
PCB Replacement (Defective
discharge pipe thermistor
input circuit)
Discharge pipe temperature thermistor (Tho-D)
Resistance temperature characteristics
Thermistor resistance (k
Ω
)
0
20
60
100
140
180
0
20
40
60
80
100
120
140
160
Error display :
e39
●
Display conditions
If the temperature sensed by the thermistor is –30ºC or lower con-
tinuously for 5 seconds between 10 minutes and 10 minutes 20
seconds (2minutes and 2minutes 20seconds) after the compressor
goes ON, the compressor stops. After a 3 minute delay, the com-
pressor restarts. If this state is detected 3 times in 40 minutes.
Error display :
e40
NO
Is the service
valve fully open?
The outdoor unit’s control PCB
is faulty (the 63H1 input circuit
is faulty)
®
Replace
Did 63H1 operate?
Is the 63H1
connector’s connection
OK?
Is the electronic
expansion valve’s connector
connection OK?
1. During cooling
• Is the outdoor unit’s fan motor turning?
• Is there a short circuit in the outdoor unit?
• Is there enough air inlet and air outlet space?
2. During heating
• Is the indoor unit’s heat exchanger thermistor deviating from the detection
case?
• Is the filter clogged?
3. During Cooling and Heating
When 63H1 is operating
YES
NO
YES
NO
YES
YES
Open the service valve.
Correction
NO
Correction
Note (1) If there is an abnormality in the electronic expansion valve
connector’s connection, be sure to reset the power supply.
8
[63H1 operation]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
If the power supply breaker is turned from OFF to ON quickly, E40 may be displayed. This is not abnormal.