Mitsubishi Mr. Slim Error Codes

Mitsubishi Mr. Slim Error Codes 

Mitsubishi Mr. Slim Error Codes E0

Check code – EO

Diagnosis of malfunction – Signal transmitting/receiving error (Indoor controller does not respond to remote controller signal.)
Cause – During individual unit control – 1) Bad contact of transmission wire
Check points- 1) Check the transmission wire. 2) Check with another remote controller.

Mitsubishi Mr. Slim Error Codes P1

Check code P1
Diagnosis of malfunction 
Abnormality of room temperature of thermistor (RT1)
Cause
1) Bad contact of thermistor
2) Damaged thermistor
Check points
1) Check the thermistor.
2) Measure the resistance of the thermistor. Normal resistance should be as follows.
32°F····15kΩ 86°F·····4.3kΩ
50°F······9.6kΩ 104°F·····3.0kΩ
68°F······6.3kΩ
If the resistance is normal, replace the indoor controller board.

Mitsubishi Mr. Slim Error Codes P2

Check code P2

Diagnosis of malfunction
Abnormality of indoor coil thermistor (RT2)
Cause
1) Bad contact of thermistor
2) Damaged thermistor

Check points

Mitsubishi Mr. Slim Error Codes P2

1) Check the thermistor.
2) Measure the resistance of the thermistor.
Normal resistance should be as follows.
32°F····15kΩ 86°F·····4.3kΩ
50°F······9.6kΩ 104°F·····3.0kΩ
68°F······6.3kΩ
If the resistance is normal, replace the indoor controller board.

Mitsubishi Mr. Slim Error Codes P3

Check code P3

Diagnosis of malfunction
Signal transmission error (Remote controller does not respond to indoor controller signal.)
Cause
1) Bad contact of transmission
wire
Check points
1) Check the transmission wire.
2) Check with another remote controller.

Mitsubishi Mr. Slim Error Codes P4

Check code  P4
Diagnosis of malfunction
Abnormality of drain sensor
Cause
1) Bad contact of transmission wire
2) Damaged thermistor
Check points
1) Check the connector.
2) Measure the resistance of the thermistor ➃ – ➄. As for the normal resistance, refer to the case of P1.

Mitsubishi Mr. Slim Error Codes P5

Check code P5
Diagnosis of malfunction
Malfunction of drain pump
Cause
1) Malfunction of drain pump
2) Damaged drain sensor
Check points
1) Check the drain pump.
2) Check the drain sensor.

Mitsubishi Mr. Slim Error Codes P5

 Mitsubishi Mr. Slim Error Codes P6

Check code P6

Diagnosis of malfunction
Coil frost protection is work-ing.
Cause
1) Short cycle of air cycle
2) Dirty air filter
3) Damaged fan
4) Abnormal refrigerant
Check points
1) Clear obstructions from the air cycle.
2) Clean the air filter
3) Check the fan.
4) Check the refrigerant temperature.

Mitsubishi Mr. Slim Error Codes P6

Mitsubishi Mr. Slim Error Codes P7

Check code P7
Diagnosis of malfunction
System error
Cause
1) Wrong address-setting
2) Wrong SW6-setting
Check points
1) Check the address-setting.
2) Check SW6 setting.

Mitsubishi Mr. Slim Error Codes P7