Mitsubishi Heavy Industries SCM71ZS-W User Manual

-
143
-
'19 • SCM-SM-276
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
E39
Discharge pipe
temperature sensor anomaly
Keeps ashing
Stays OFF
– 8
-
time ash
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is the
discharge pipe
temperature sensor
connector connected
properly?
YES
Are the
characteristics
of discharge pipe
temperature
sensor OK?
NO
For the characteristics of discharge pipe
temperature sensor, see the following graph.
140120100806040200
0
100
50
[T 90
°C]
NO
Temperature-resistance characteristics
Temperature sensor resistance (kΩ)
Temperature (°C)
(Broken wire)
(Short-circuit)
YES
Correct connector.
Defective discharge
pipe temperature
sensor
➞
Replace.
Defective outdoor unit
main PCB
➞
Replace.
(Defective temperature
sensor input circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) on
the discharge pipe temperature
sensor
3 . Condition of error displayed
When the temperature sensor
detects - 25°C or lower for 5
seconds continuously within
10 minutes to 10 minutes 20
seconds after the compressor
ON, the compressor stops. After
3-minute delay, the compressor
starts again automatically, but
if this anomalous temperature
is detected 3 times within 40
minutes.
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