Error Display E39; Defective Discharge Pipe Thermistor; 63H1 Operation; While The 63H1 Is Operating - Mitsubishi Heavy Industries FDCA Series Technical Manual

e39
Error display :
9
Indoor unit
Red LED
Green LED Keeps flashing
Is the discharge
pipe thermistor
connector connection
OK?
NO
Repair
● Display conditions
If the temperature sensed by the thermistor is –10ºC or lower con-
tinuously for 5 seconds between 2 minutes and 2 minutes 20 sec-
onds (10 minutes and 10 minutes 20 seconds) 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 60 (40) minutes.
Note (1) Values in ( ) show for the case of the FDCA801, 1001 models.
e40
Error display :
10
Indoor unit
Red LED
Green LED Keeps flashing
The outdoor unit control PCB
is faulty. (The 63H1 input circuit
is faulty.)
[Open phase at L3-phase of 52C primary side]
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
52C
primary side L3 phase
open?
NO
The outdoor unit control PCB
is faulty. Replace

[Defective discharge pipe thermistor]

Outdoor unit
Stays OFF Red LED
Green LED
Are the discharge
YES
pipe thermistor characteristics
OK, is there no
broken wire?
Defective discharge pipe
thermistor Replacement

[63H1 operation]

Stays OFF Red LED
Green LED
Is the 63H1 operating?
NO
Replace
Outdoor unit
Red LED
Green LED
(1)
YES
Repair
(2)
1 time flash
Keeps flashing
YES
NO
100
Outdoor unit
1 time flash
Keeps flashing

While the 63H1 is operating

1. During Cooling
• Is the outdoor unit fan motor running?
• Is there a short circuit in the outdoor unit?
YES
• Is there enough space for inlet and outlet?
2. During Heating
• Is the indoor unit heat exchanger thermistor separated
from the sensing case?
• Is the filter clogged?
3. During Cooling and Heating
• Is the refrigerant overcharge?
• Is the service valve fully open?
1 time flash
Keeps flashing
Notes (1) Also check if there is voltage at the L3 phase on the 52C primary
side, but no voltage on the secondary side (coil wire disconnection
or faulty contacts).
(2) If there is voltage at the L3 phase on the 52C primary side and it is
not abnormal, the outdoor unit control PCB is faulty.
150
- -
Defective outdoor unit control
PCB Replacement (Defective
discharge pipe thermistor
input circuit)
Temperature-resistance
characteristics of discharge
pipe thermistor (Th
O-
T < 80°C
50
0
0 20 50 80
Temperature [T] (°C)
D)
10
T > 80°C
5
0
100 120