Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 135

Error code Indoor display
Remote control: E55
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
Model FDC200VSA-W
2. Error detection method
When anoumalous low
temperature (resistance) is
detected by the compressor
under-dome temperature sensor
3. Condition of error displayed
If the temperature sensor detcts
-50°C or lower for 5 seconds
continuously within 10 minutes
to 10 minutes 20 seconds after
compressor ON, the compressor
stops. When the compressor
is restarted automatically after
3-minute delay, if this anomaly
ocuurs 3 times within 40
minutes.
4. Presumable cause
• Defective under-dome
temperature sensor connection
• Defective under-dome
temperature sensor
• Defective outdoor unit control
PCB
Note:
RUN light
–
Green LED
Keeps flashing
control PCB
Yellow LED
Keeps flashing
5. Troubleshooting
under-dome temperature
characteristics of
under-dome temperature
(Broken wire)
(Short-circuit)
TIMER light
Content
–
temperature sensor anomaly
Red LED
1-time flash
(Model FDC200VSA-W only)
Diagnosis
Is the
connection of
sensor connector
OK?
YES
For the characteristics of under-dome
temperature sensor, see the following
graph.
Are the
sensor OK?
Temperature-resistance characteristics
15
10
5k at 25°C
5
0 10 20 30 40 50
Temperature (°C)
134
- -
'22 • PAC-SM-422
Compressor under-dome
Countermeasure
Correct connection of
NO
under-dome temperature
sensor connector.
Defective under-dome
NO
temperature sensor
➞Replace.
Replace outdoor unit
YES
control PCB.
(Defective under-dome
temperature sensor input
circuit)