Table of Contents
Indoor display
Error code
E53
Remote controller:
inverter PCB
1. Applicable model
All models
2. Error detection method
When the suction pipe
temperature thermistor detects
anomalously low temperature
3. Condition of Error displayed
If the temperature thermistor
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-minutes
delay, if this anomaly ocuurs 3
times within 40 minute.
4. Presumable cause
• Defective suction pipe
temperature thermistor
connection
• Defective suction pipe
temperature thermistor
• Defective outdoor control
PCB
Note:
RUN light
Keeps flashing
Green LED
Outdoor
control PCB
Keeps flashing
Yellow LED
Outdoor
Keeps flashing
5. Troubleshooting
of suction pipe temperature thermistor
characteristics of suction pipe
temperature thermistor OK?
(Broken wire)
15
10
(Short circuit)
TIMER light
Content
4 times flash
Suction pipe temperature
Red LED
1 time flash
Diagnosis
Is the connection
connector OK?
YES
Are the
YES
Temperature-resistance characteristics
5kΩ at 25°C
5
0
10
20
30
40
50
Temperature (°C)
448
-
-
'12 • PAC-T-174
thermistor anomaly
Countermeasure
Correct connection of
NO
suction pipe temperature
thermistor connector.
Defective suction pipe
NO
temperature thermistor ➞
Replace.
Defective outdoor control
PCB ➞ Replace.
(Defective suction pipe
temperature thermistor
input circuit)
- Quick Links:
- Specifications
- Outdoor Units
- Outdoor Units
Hide quick links:
Chapters
Table of Contents
