Mitsubishi Heavy Industries FDT71VNXVD Service Manual page 85

Error code
Remote controller: E49
1. Applicable model
All models
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
Note:
LED Green Red
Content
Indoor Keeps flashing Stays OFF
Outdoor 1 time flash
Keeps flashing
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?
85 95
– –
Low pressure error or
low pressure sensor anomaly (2/2)
NO
NO
NO
NO
YES
'10 • PAC-SM-137A
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)