ERROR
CONTENTS
ERROR CAUSE
COUNTERMEASURE
Discharge
pressure sensor
error
Replace discharge pressure sensor PH.
Discharge pressure sensor PH
is faulty.
1. Error occurrence condition
1) Voltage output from output
remains under 0.8V for 3
minutes or longer. However,
detection isn't performed for
3 minutes after power is
applied to outdoor unit.
2) Output sensor detection
value is 3.46MPa or higher.
2. Relevant operation
1) All compressors are stopped.
2) Error is displayed on LED of
outdoor unit and output to
communication bus line.
3. Clearance
Output voltage from pressure
sensor returns within 1- 5V.
19
Liquid pressure
sensor error
Replace liquid line pressure sensor PM.
Liquid line pressure sensor PM
is faulty.
1A
ERROR
CODE
05-20
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