Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 133

Indoor display
Error code
Outdoor unit
Remote control:
E53
Outdoor unit
inverter PCB
1. Applicable model
Models FDC100VN(S)X-W,
100VN(S)A-W, 200VSA-W
2. Error detection method
When the suction pipe
temperature sensor detects
anomalously low temperature
3. Condition of error displayed
If the temperature sensor
detects -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, but if this anomaly ocuurs
3 times within 40 minutes.
4. Presumable cause
• Defective suction pipe
temperature sensor connection
• Defective suction pipe
temperature sensor
• Defective outdoor unit control
PCB
Note:
RUN light
–
Green LED
control PCB
Keeps flashing
Yellow LED
Keeps flashing
5. Troubleshooting
of suction pipe temperature sensor
characteristics of suction pipe
temperature sensor OK?
(Broken wire)
15
10
(Short-circuit)
TIMER light
Content
–
Red LED
(Models FDC100VN(S)X-W, 100VN(S)A-W,
1-time flash
Diagnosis
Is the connection
connector OK?
YES
For the characteristics of suction pipe
temperature sensor, see the following graph.
Are the
Temperature-resistance characteristics
5kΩ at 25°C
5
0 10 20 30 40 50
Temperature (°C)
132
- -
'22 • PAC-SM-422
Suction pipe temperature
sensor anomaly
200VSA-W only)
Countermeasure
Correct connection of
NO
suction pipe temperature
sensor connector.
Defective suction pipe
NO
temperature sensor➞
Replace.
Defective outdoor unit
YES
control PCB ➞Replace.
(Defective suction pipe
temperature sensor input
circuit)