Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 109

Error code Indoor display
Remote control:
E39
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
All models
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 -10(-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.
Note Value in ( ) is for the model
FDC100VNP-W.
4. Presumable cause
• Defective outdoor unit control
(or main) PCB
• Broken sensor harness or
temperature sensing section
(Check molding.)
• Disconnected wire connection
(connector)
Note:
RUN light
Keeps flashing
Green LED
Keeps flashing
control PCB
Yellow LED
Keeps flashing
5. Troubleshooting
discharge pipe
temperature sensor
connector connected
properly?
Are the
characteristics
of discharge pipe
temperature
sensor OK?
• Model FDC100VNP-W
(Broken wire) Temperature-resistance characteristics
100
50
0
[T 90 ]
°C
0
(Short-circuit)
• Models FDC100, 200
(Broken wire)
200
180
160
140
120
100
80
60
40
20
0
0
(Short-circuit)
TIMER light
Content
4-time flash
Red LED
1-time flash
temperature sensor anomaly
Diagnosis
Is the
YES
For the characteristics of discharge pipe
temperature sensor, see the following graph.
YES
20 40 60 80 100
Temperature (°C)
Temperature-resistance characteristics
20 40 60 80 100
Temperature (°C)
108
- -
'22 • PAC-SM-422
Discharge pipe
Countermeasure
Correct connector.
NO
Defective discharge pipe
NO
temperature sensor➞
Replace.
Defective outdoor
unit control (or main)
PCB➞Replace.
(Defective discharge pipe
temperature sensor input
circuit)
120 140
120 140 160