Mitsubishi Heavy Industries SRK100VNXPZSX Technical Manual page 129

Error code
None
Remote control:
1. Applicable model
All models
2. Error detection method
Anomalously low temperature
or high temperature (resistance)
is detected by indoor room
temperature sensor (Th1)
3. Condition of error displayed
• When the temperature sensor
detects -45°C or lower for 15
seconds continuously, the
compressor stops. After 3-minute
delay, the compressor starts again
automatically, but if this error
occurs again within 60 minutes
after the initial detection.
4. Presumable cause
• Defective room temperature
sensor connector
• Defective room temperature
sensor
• Faulty indoor unit control PCB
Note:
RUN light TIMER light
Indoor
display
2-time flash ON
Green LED Red LED
Outdoor unit
control PCB
Keeps flashing Stays OFF
5. Troubleshooting
Diagnosis
Is the
connection of room
temperature sensor
connector OK?
YES
Are the
characteristics of room
temperature sensor
OK?
Temperature-resistance characteristic
(Broken wire)
15
10
5
(Short circuit)
0
128
-
Content
Room temperature
sensor anomaly
NO
NO
YES
°C
5kΩ at 25
10 20 30 40 50
Temperature (°C)
-
'17 • PAC-T-257
Countermeasure
Correct. ➞ Connect
connector.
Defective room temperature
sensor ➞ Replace.
Defective indoor unit
control PCB ➞ Replace.
(Defective room
temperature sensor input
circuit)