Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 97

Error code
None
Remote control:
1. Applicable model
All models
2. Error detection method
Anomalously low temperature
or high temperature (resistance)
is detected by room air
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 air
temperature sensor connector
• Defective room air
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
air temperature sensor
connector OK?
YES
Are the
characteristics of room
air temperature sensor
OK?
Temperature-resistance characteristic
(Broken wire)
15
10
5
(Short-circuit)
0
96
-
Content
Room air temperature
sensor anomaly
NO
NO
YES
°C
5kΩ at 25
10 20 30 40 50
Temperature (°C)
-
'22 • PAC-SM-422
Countermeasure
Correct it. ➞ Connect
connector.
Defective room air
temperature sensor ➞
Replace.
Defective indoor unit
control PCB ➞ Replace.
(Defective room air
temperature sensor input
circuit)