Mitsubishi Heavy Industries SCM50ZS-W User Manual

-
138
-
'19 • SCM-SM-281
Error code
Remote control:
LED Green Red
Indoor
Content
E37
Outdoor heat exchanger
temperature sensor anomaly
Indoor Keeps ashing Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is the
outdoor heat
exchanger temperature
sensor
connector
connected
properly?
YES
Are the
characteristics of
outdoor heat exchanger
temperature
sensor
OK?
NO
For the characteristics of outdoor heat exchanger
temperature sensor, see the following graph.
YES
Temperature-resistance characteristics
Temperature sensor resistance (kΩ)
Temperature (°C)
15
10
5
010304020 50
5kΩ at 25°C
NO
(Broken wire)
(Short-circuit)
Correct connector.
Defective outdoor heat
exchanger temperature
sensor
➞
Replace.
Defective outdoor
unit main or sub
PCB
➞
Replace.
(Defective outdoor heat
exchanger temperature
sensor input circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) on
the outdoor heat exchanger
temperature sensor
3 . Condition of error displayed
• When the temperature sensor
detects-55°C or lower for 20
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
or sub PCB
• Broken sensor harness or
temperature sensing section
• Disconnected wire connection
(connector)
Note:

Mitsubishi Heavy Industries SCM50ZS-W Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SCM50ZS-W
Category	Air Conditioner
Language	English