-
283
-
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Correct it
NO
YES
YES
NO
The under-dome temperature
thermistor is faulty Replace it
Are the under-dome
temperature thermistor
connections OK?
Are the under-dome
temperature thermistor
characteristics OK?
The outdoor unit control PCB is
faulty Replace it (The under-
dome temperature thermistor input
circuit is faulty.)
5
10
15
0
20
40
60
80
100
Under-dome temperature thermistor
(Tho-H)
Resistance-temperature characteristics
Temperature (ºC)
Thermistor resistance (k
Ω)
18
Error display :
E54
[Low pressure sensor fault] [Only case of 302~1002 models]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
YES
NO
NO
Correct it
Replace the low
pressure sensor
NO
Replace the outdoor
unit control PCB.
Does the error resolved?
YES
Are the low pressure sensor
connector (sensor side, board
side) connected properly?
Does the actual pressure match
up to the sensed value by the
microcomputer?
Check if the refrigerant amount is
proper, and if there is something
wrong with the refrigerant circuit.
•
Display Conditions
The compressor stops when the voltage from the low pressure senor is detected
lower than 0V or higher than 3.49V for 5 seconds between 2 minutes and 2
minutes 20 seconds after compressor starts. And it will restart automatically
after 3-minute delay.
The error occurs when the condition happens 3 times within 40 minutes.
Note (1) See page 289 concerning the operation data display method
in the remote controller.
19
[Under-dome temperature thermistor fault] [Only case of 802, 1002 models]
Error display :
E55
•
Display conditions
The compressor stops when the temperature is -50°C or lower for 5 seconds be-
tween 10 minutes and 10 minutes 20 seconds after the compressor starts. And it
will restart automatically after 3-minute delay.
The error occurs when the condition happens 3 times within 40 minutes.
