Mitsubishi FDCVA302HENR User Manual

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Error display :
e49
[Low pressure abnormal or low pressure sensor disconnected.]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
YES
NO
NO
Correction
Replace the low
pressure sensor
NO
Change the outdoor
unit inverter PCB.
Did it return to normal?
Are the low pressure sensor
connector connections
(sensor side, PCB side) OK?
Is the amount ofrefrigerant proper?
Is the refrigerant circuit abnormal?
Compressor
stop
Compressor
operation
0.079 0.227
Low pressure (MPa)
¥ Abnormal temperature detection
● Display Conditions
If the pressure sensed by the low pressure sensor is 0.079 MPa
or lower continuously for 15 seconds, the compressor stops.
After a 3-minute delay, the compressor starts again, but if it
happens 3 times within 60 minutes.
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Is the low pressure during
operation normal?
Charge with refrigerant.
NO
YES
Are the low
pressure sensor – suction pipe
temperature thermistor
characteristics OK?
Low pressure sensor – suction pipe
temperature thermistor is faulty Replace
NO
YES
Are the low
pressure sensor – suction pipe
temperature thermistor connector
connections OK?
Correction
NO
YES
Is the service
valve fully open?
Open it fully.
NO
YES
Indoor control PCB isfaulty Replace
(Low pressure sensor – suction pipe temperature
thermistor input circuit is faulty.)

Mitsubishi FDCVA302HENR Specifications

General

Brand	Mitsubishi
Model	FDCVA302HENR
Category	Air Conditioner
Language	English