Mitsubishi Heavy Industries FDURA301 User Manual

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150
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9
[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 [T] (°C)
T
<
80°C
T
>
80°C
100
50
0
10
5
0
05020 80 100 120
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)
Temperature-resistance
characteristics of discharge
pipe thermistor (Th
O- D)
Thermistor resistance
(kΩ)
[T
<
80°C]
Thermistor resistance
(kΩ)
[T
>
80°C]
Error display :
e39
● 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.
Error display :
e40
NO
YES
Is the 63H1 operating?
The outdoor unit control PCB
is faulty. (The 63H1 input circuit
is faulty.) Replace
1. During Cooling
• Is the outdoor unit fan motor running?
• Is there a short circuit in the outdoor unit?
• 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?
While the 63H1 is operating
10
[63H1 operation]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
52C
primary side L3 phase
open?
NO
YES
(1)
(2)
The outdoor unit control PCB
is faulty. Replace
Repair
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.
[Open phase at L3-phase of 52C primary side]

Mitsubishi Heavy Industries FDURA301 Specifications

General

Brand	Mitsubishi Heavy Industries
Model	FDURA301
Category	Air Conditioner
Language	English