Mitsubishi FDT71VH User Manual

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99
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'20 • PAC-SM-351
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
E7
Return air temperature
sensor anomaly
Keeps ashing 1-time ash
Keeps ashing Stays OFF
1. Applicable model
5. Troubleshooting
Diagnosis Countermeasure
NO
NO
YES
Is the
connection of return
air temperature sensor
connector OK?
Are the
characteristics of return air
temperature sensor
OK?
YES
15
10
5
010304020 50
Temperature-resistance characteristic
Temperature sensor resistance (kΩ)
Temperature (°C)
5kΩ at 25°C
(Broken wire)
(Short-circuit)
Correct.
➞
Connect
connector.
Defective return air
temperature sensor
➞
Replace.
Defective indoor unit
control PCB
➞
Replace.
(Defective return air
temperature sensor input
circuit)
2. Error detection method
Anomalously low temperature
or high temperature (resistance)
is detected by indoor return air
temperature sensor (Thi-A)
3 . Condition of error displayed
• When the temperature sensor
detects -50°C or lower for
5 seconds continuously, the
compressor stops. After 3-minute
delay, the compressor starts again
automatically, but if this error
occurs again within 60 minutes
after the initial detection.
4. Presumable cause
• Defective return air
temperature sensor connector
• Defective return air
temperature sensor
• Faulty indoor unit control
PCB
Note:

Mitsubishi FDT71VH Specifications

General

Brand	Mitsubishi
Model	FDT71VH
Category	Air Conditioner
Language	English