Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 236

Error code
Indoor control PCB
Remote control:
E49
Outdoor control PCB
Outdoor inverter
1. Applicable model
Models FDC71-140VNX, 100-
140VSX, 200, 250VSA
2. Error detection method
3. Condition of error displayed
4. Presumable cause
Note:
LED Green
Keeps flashing
Keeps flashing
Yellow LED
PCB
Keeps flashing
5. Troubleshooting
From previous page
service valve fully
connections of low
pressure sensor and suction pipe
temprerature sensor
connector OK?
characteristics of
low pressure sensor, suction
pipe temperature
sensor OK?
Is the low
pressure normal during
operation?
Red
Content
Low pressure error or
Stays OFF
1-time flash
low pressure sensor anomaly (2/2)
(Models FDC71-140VNX, 100-140VSX, 200, 250VSA only)
Diagnosis
Is the
opened?
YES
Are the
YES
Are the
YES
YES
235
- -
'19 • PAC-T-327
Countermeasure
Open fully.
NO
Correct.
NO
Defective low pressure
NO
sensor, suction
pipe temperature
sensor ➞ Replace.
Charge refrigerant.
NO
Defective outdoor unit
control PCB ➞ Replace.
(Defective low pressure
sensor, suction pipe
temperature sensor circuits)