When The Temperature Sensor Detects -50°C Or Lower For 5 Seconds Continuously; The Compressor Stops. After; Minutes After The Initial Detection - Mitsubishi Heavy Industries SRK20ZS-W Technical Manual

Error code
Remote control: E6
1. Applicable model
All models
2. Error detection method
Anomalously low temperature
or high temperature (resistance)
is detected on the indoor heat
exchanger temperature sensor
(Thi-R1, R2 or R3).
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.
• Or if short-circuit detected for
5 seconds continuously.
4. Presumable cause
• Defective indoor heat
exchanger temperature sensor
connector
• Indoor heat exchanger
temperature sensor anomaly
• Faulty indoor unit control
PCB
Note:
LED Green Red
Keeps flashing 1-time flash
Indoor
5. Troubleshooting
Diagnosis
Is the
connection of indoor heat
exchanger temperature sensor
connector OK?
YES
Are
characteristics of indoor
heat exchanger temperature
sensor OK?
Temperature-resistance characteristic
(Broken wire)
15
10
5
(Short-circuit)
0 10
Temperature (°C)
224
-
Content
Indoor heat exchanger
temperature sensor anomaly
NO
NO
YES
°C
5kΩ at 25
20 30 40 50
-
'21 • SRK-T-299
Countermeasure
Correct it.
➞ Insert connector securely.
Defective indoor heat
exchanger temperature
sensor ➞ Replace.
Defective indoor unit
control PCB ➞ Replace.
(Defective indoor heat
exchanger temperature
sensor input circuit)