-
152
-
14
[Defective low pressure and high pressure sensor]
(Only case of FDCA801, 1001 type)
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Error display :
e54
YES
YES
Is the
connection of the
low pressure sensor connector
and high pressure sensor
connector OK?
Do the pressure
(actual measurement)
and remote controller’s
display value match?
NO
NO
NO
Correction
Replacement low pressure
or high pressure sensor
Change of outdoor
unit control PCB
Did it rerun
to normal?
Is the refrigerant level appropriate?
Is there any abnormality in the
refrigeration circuit?
●
Display conditions
If the voltage detected by the sensor is OV or lower or 3.49 V or higher continuously for 5 seconds between 2 minutes
and 2 minutes 20 seconds after the compressor goes ON, the compressor stops. After a 3 minute delay, the compressor
restarts If this condition is detected 3 times withhin 40 minutes.
13
[Defective suction pipe thermistor] (Only case of FDCA801, 1001 type)
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Temperature (
°
C)
15
10
5
0
10
30
40
20
50
5k
Ω
at 25
°
C
Is the suction pipe
thermistor connector
OK?
Repair
NO
YES
NO
YES
Are the suction pipe thermistor
characteristics OK, is there
any broken wire?
Defective suction pipe
thermistor Replacement
Defective outdoor unit control
PCB Replacement (Defective
suction pipe thermistor input circuit)
Suction pipe thermistor (Th
O-
S)
Resistance temperature characteristics
Resistance
(k
Ω
)
Error display :
e53
●
Display conditions
If the temperature sensed by the thermistor is –50ºC or lower con-
tinuously for 5 seconds between 10 minutes and 10 minutes 20 sec-
onds after the compressor goes ON, the compressor stops. After a 3
minute delay, the compressor restarts. If this state is detected 3 times
in 40 minutes.
Note (1) See page 155 concerning the methods of displaying operating data with the remote controller.