Daikin R71FUV1 Service Manual page 240

Troubleshooting by Remote Controller
Remote Controller Display
H4
Applicable Models
RZQ-B
Method of Error Detection
Check the continuity of LPS
LPS is not operated when the low pressure is dropped
under specific pressure (0.12MPa).
Error Decision Conditions
When there is no continuity in the LPS during
compressor start operating.
LPS is not operated when the low pressure is dropped
under specific pressure (0.12MPa) during compressor
operating.
Supposed Causes
Defective LPS
Disconnection in LPS harness
Defective connection of LPS connector
Defective outdoor unit PCB
Refrigerant shortage
Stop valve is not opened
Defective electronic expansion valve
Clogged check valve
Si20-701_B
233