Daikin FTX25JVEA9 Service Manual page 282

Si18-201
3.3.7 LP Drop Error
FC
Outdoor Unit
Indication
Method of When the value of LP sensor was kept at lower level for a certain time range after the certain
time range passed since the compressor started.
Malfunction
Detection
Malfunction When the value of LP sensor was kept at 0kg/cm² · G or less for a certain time range after
TLPGD period
Decision
(15 seconds when cooling, 150 seconds when heating) passed since the compressor started.
Conditions
"
Supposed
"
Causes
"
"
Troubleshooting
Service Diagnosis
Malfunction of LP sensor
Faulty contact of LP sensor connector
Gas shortage
Heating operation under low outside air temperature beyond the operative area
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Start
Make sure of LP sensor
connector connection.
Is it normal?
YES
Is the stop valve open?
NO
Is the gas lacking?
NO
Troubleshooting - Outdoor Unit Related
NO
YES
YES
Check LP sensor
connectors.
Check stop valve.
Charge with the proper
amount of refrigerant.
Use as it is.
(MF026)
269