Daikin J Series Service Manual Page 241

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Troubleshooting - Outdoor Unit Related SiE18-201
230 Service Diagnosis
3.3.19 Abnormal LP Error
Outdoor Unit
Indication
JC
Method of
Malfunction
Detection
1. Error is determined by the LP sensor value when the compressor is off.
2. Error is determined by the LP sensor value in normal operation when the compressor is on.
3. Error is determined by the LP sensor value when a certain time range passed after standby
operation at time of starting.
Malfunction
Decision
Conditions
When either of 1-3 conditions mentioned above was satisfied.
Supposed
Causes
Defective LP sensor
Faulty connectors connection of LP sensor
Possibility of gas shortage
When cooling: Refrigerant amount 0-20%
When heating: Refrigerant amount 0-5%
Troubleshooting
Start
Check LP sensor
connectors.
Check stop valve.
Charge with the proper
amount of refrigerant.
Could be outside causes
other than defect.
Probe where the noise
comes from and take
remedy.
Replace LP sensor after
collecting refrigerant and
charge with refrigerant.
(MF038)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check LP sensor connectors.
Is it normal?
NO
Is the stop valve open?
YES
YES
NO
Is gas lacking?
YES
Does
the LP sensor value
vary in any operative
status?
NO
NO
YES
Faulty LP sensor
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