Mitsubishi Electric FDT125VNVF Technical Manual page 430

Error code
E6
Remote controller:
Note(1) Value in ( ) are the Th2
1. Applicable model
All models
2. Error detection method
Anomalously low temperature
or high temperature (resistance)
is detected on the indoor heat
exchanger sensor (Th2 , Th2
1
3. Condition of Error displayed
• When the temperature sensor
detects -28°C or lower for 15
seconds continuously, the
compressor stops. After 3-
minutes delay, the compressor
starts again automatically,
but if this error occurs again
within 60 minutes after the
initial detection.
4. Presumable cause
• Defective indoor heat
exchanger sensor connector
• Indoor heat exchanger
temperature sensor anomaly
• Faulty indoor control PCB
Note:
RUN light TIMER light
Indoor
1(3) time flash (1)
display
Green LED Red LED
Outdoor
Keeps flashing Stays OFF
control PCB
.
2
5. Troubleshooting
Is the
connection of indoor heat
exchanger temperature sensor
connector OK?
YES
Are
characteristics of indoor
heat exchanger temperature
sensor OK?
).
2
Temperature-resistance characteristic
(Broken wire)
15
10
5
(Short circuit)
Content
Indoor heat exchanger
ON
temperature sensor anomaly
Diagnosis
NO
NO
YES
°C
5kΩ at 25
0 10 20 30 40 50
Temperature (°C)
429 429
- - - -
'12 • PAC-T-174
Countermeasure
Correct. ➞ Insert connector
securely.
Defective indoor heat
exchanger temperature
sensor ➞ Replace.
Defective indoor control
PCB ➞ Replace.
(Defective indoor unit heat
exchanger temperature
sensor input circuit)