Mitsubishi SRK100VNXWPZSX, Руководство по обслуживанию

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156
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'20 • PAC-SM-351
E38
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is
the outdoor air
temperature sensor connector
connected properly?
YES
Is the
characteristics of the
outdoor air temperature
sensor OK?
NO
For the characteristics of outdoor air
temperature sensor, see the following graph.
YES
0
5
10
15
20
25
30
35
0 10 20 30 40 50
NO
Temperature-resistance characteristics
Temperature sensor resistance (k
Ω
)
Temperature (°C)
(Broken wire)
(Short-circuit)
Correct connector.
Defective outdoor air
temperature sensor
➞
Replace.
Defective outdoor unit
control PCB
➞
Replace.
(Defective outdoor air
temperature sensor input
circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) on
outdoor air temperature sensor
3. Condition of error displayed
• When the temperature sensor
detects -45°C or lower for 5
seconds continuously within 2
minutes to 2 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.
• When -45°C or lower is detected for
5 seconds continuously within 20
seconds after compressor ON.
4. Presumable cause
• Defective outdoor unit control
PCB
• Broken sensor harness or
temperature sensing section
(Check molding.)
• Disconnected wire connection
(connector)
Note:
Error code
Remote control:
Content
1-time flash Keeps flashing
Keeps flashing
1-time flash Keeps flashing
Indoor display
RUN light TIMER light
Green LED
Yellow LED
Red LED
Outdoor unit
control PCB
Outdoor unit
inverter PCB
Outdoor air temperature
sensor anomaly