Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 324

Error code
Remote controller: E49
1. Applicable model
Model FDC 71 – 250
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
Note:
LED Green Red
Keeps flashing Stays Off
Indoor
Keeps flashing 1 time flash
Outdoor
5. Troubleshooting
Diagnosis
Continued from previous page.
Is the
service valve fully
opened?
YES
Are the
connections of low
pressure sensor and suction pipe
temprerature thermister
connector OK?
YES
Are the
characteristics of
low pressure sensor, suction
pipe temperature
thermistor OK?
YES
Is the low
pressure normal during
operation?
314
–
Low pressure error or
Content
low pressure sensor anomaly (2/2)
(Model FDC71 - 250)
NO
NO
NO
NO
YES
–
Countermeasure
Open fully.
Correct.
Defective low pressure
sensor, suction pipe
temperature thermistor 
Replace.
Charge refrigerant.
Defective outdoor control
PCB  Replace.
(Defective low pressure
sensor, suction pipe
temperature thermistor
circuits)