Mitsubishi Heavy Industries SRK20ZJ-S Service Manual

-
102
-
'10 • SCM-SM-094
Error code
Remote controller:
LED Green Red
Indoor
Content
E37
Outdoor heat exchanger
temperature sensor anomaly
Keeps flashing Stays OFF
Outdoor
– 8 times flash
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 (k)
Temperature (°C)
15
10
5
0 10 30 4020 50
5k at 25°C
NO
(Broken wire)
(Shot circuit)
Correct connector.
Defective outdoor heat
exchanger temperature
sensor
ª
Replace.
Defective outdoor main
PCB
ª
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 within 20 second
after power ON.
4. Presumable cause
• Defective outdoor main PCB
• Broken sensor harness or
temperature sensing section
• Disconnected wire connection
(connector)
Note:

Mitsubishi Heavy Industries SRK20ZJ-S Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SRK20ZJ-S
Category	Air Conditioner
Language	English