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118
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'14 • KX-SM-202
E54
E54-1, 2 *1
High pressure sensor anomaly (PSH)
Low pressure sensor anomaly (PSL)
Keeps flashing
Stays OFF
Keeps flashing
*1
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis
Countermeasure
Is anomalous
pressure detected?
Is the
connector of the
sensor inserted properly to
the connector on the
outdoor control
PCB?
Save data for 30 minutes before stopping in Mente PC.
Reset the power and restart operation.
Check the data for 30 minutes before stopping.
YES
YES
NO
High pressure sensor
output characteristics
Sensor output Black (GND) – White; Output voltage (Black – Red; DC5V)
Pressure (MPa)
Pressure (MPa)
Low pressure sensor
output characteristics
NO
NO
NO
YES
Does E54 recur?
Does
the pressure
converted from the
sensor output voltage match the
actual pressure measure
by pressure
gauge?
YES
Output voltage (V)
Output voltage (V)
Check and save the data of
operating conditions.
Check the conditions
whether it occurs
immediately after the
power on or during
operation or stopping.
Check the sensed value.
Insert the connector
securely and restart
operation.
Temporary malfunction by
noise.
Correct if the source of
noise is specified.
Replace sensor (PSH, PSL)
Replace outdoor control
PCB.
2. Error detection method
Detection of anomalous pressure
(voltage) of PSH or PSL.
Operation range
High pressure : 0-4.15MPa
Low pressure : 0-1.7MPa
3. Condition of error displayed
If anomalous sensor output
voltage (0V or lower or 3.49V
or higher) is detected for 5
seconds within 2 minutes to 2
minutes 20 seconds after the
compressor ON.
4. Presumable cause
•
Broken sensor harness
• Disconnection of sensor
harness connection (connector)
•
Sensor (PSH, PSL) anomaly
•
Outdoor control PCB anomaly
• Anomalous installation conditions
•
Insufficient airflow volume
• Excessive or insufficient
refrigerant amount
Note:
*1 E54-1: 1-time flash (PSL), E54-2 : 2-time flash (PSH)
[ ]
Error code
Remote control:
7-segment display:
LED
Green
Red
Indoor
Outdoor
Content