Daikin VRVII Manual page 117

Remote Controller Display
E5
Applicable Models
VRV-WII and -WIII Series
Method of Error Detection
Pick up the location signal using the inverter PCB from
the UVWN line connected between the inverter and the
compressor and detect location signal pattern.
Error Decision Conditions
In normal operation, location signal for a triple cycle of
frequency applied, while in locked operation, it is a
double cycle, and they are detected.
(Retry twice/60 minutes)
Supposed Causes
Inverter compressor lock
High differential pressure
Incorrect UVWN wire connection
Defective inverter PCB
Stop valve is not opened
112
Troubleshooting by Indication on the Remote Controller