Mitsubishi Heavy Industries SRK100VNXPZSX Technical Manual page 138

Error code Indoor display
Remote control:
E39
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
All models
2. Error detection method
Detection of anomalously low
temperature (resistance) on
the discharge pipe temperature
thermistor
3. Condition of error displayed
When the temperature thermistor
detects -10°C or lower for 5
seconds continuously within
10 minutes to 10 minutes 20
seconds after the compressor
ON, the compressor stops. After
3-minutes delay, the compressor
starts again automatically, but
if this anomalous temperature
is detected 3 times within 40
minutes.
4. Presumable cause
• Defective outdoor unit control
PCB
• Broken thermistor harness or
temperature sensing section
(Check molding.)
• Disconnected wire connection
(connector)
Note:
RUN light
Keeps flashing
Green LED
Keeps flashing
control PCB
Yellow LED
Keeps flashing
5. Troubleshooting
discharge pipe
temperature thermistor
connector connected
properly?
Are the
characteristics
of discharge pipe
temperature
thermistor OK?
(Broken wire)
200
100
180
温
〔T 80 〕
度 160
セ
140
ン
120
サ
抵
100
50
抗
80
60
(k)
40
20
0
0
0
0
(Short circuit)
TIMER light
Content
4-time flash
Red LED
1-time flash
temperature thermistor anomaly
Diagnosis
Is the
YES
For the characteristics of discharge pipe
temperature thermistor, see the following graph.
YES
Temperature-resistance characteristics
T 80
T 80
20 40 60 80 100 120
50 80 100
Temperature (°C)
温 度 〔 Ｔ 〕 （ ）
137
- -
'17 • PAC-T-257
Discharge pipe
Countermeasure
Correct connector.
NO
Defective discharge pipe
NO
temperature thermistor ➞
Replace.
Defective outdoor unit
control PCB ➞ Replace.
(Defective temperature
thermistor input circuit)
10
温
〔T 80 〕
度
セ
ン
サ
抵
5
抗
(k)
0
140 160