Mitsubishi Heavy Industries SCM71ZS-W User Manual

-
142
-
'19 • SCM-SM-276
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
E38
Outdoor air temperature
sensor anomaly
Keeps ashing
Stays OFF
– 8
-
time ash
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is
the outdoor air
temperature sensor connector
connected properly?
YES
Is the
characteristics of the
outdoor air temperature
sensor
OK?
For the characteristics of outdoor air
temperature sensor, see the following graph.
Temperature-resistance characteristics
15
10
5
010304020 50
Temperature sensor resistance (kΩ)
5kΩ at 25°C
(Broken wire)
(Short-circuit)
Temperature (°C)
NO
NO
YES
Correct connector.
Defective outdoor
air temperature
sensor
➞
Replace.
Defective outdoor unit
main PCB
➞
Replace.
(Defective outdoor air
temperature sensor input
circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) on
outdoor air temperature sensor
3 . Condition of error displayed
• When the temperature sensor
detects -55°C or lower for 5
seconds continuously within 2
minutes to 2 minutes 20 seconds
after the compressor ON, the
compressor stops. After 3-minutes
delay, the compressor starts again
automatically, but if this anomalous
temperature is detected 3 times
within 40 minutes.
• When -55°C or lower is detected for
5 seconds continuously within 20
seconds after compressor ON.
4. Presumable cause
• Defective outdoor unit main
PCB
• Broken sensor harness or
temperature sensing section
(Check molding.)
• Disconnected wire connection
(connector)
Note:

Mitsubishi Heavy Industries SCM71ZS-W Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SCM71ZS-W
Category	Air Conditioner
Language	English