Daikin RZQ100B8V3B Service Manual page 228

Error Codes: Outdoor Units
3.15 DC Output Overcurrent (Instantaneous) (L5)
1
Remote Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
3 3
Conditions
Supposed Causes
4
5
3–80
L5
Malfunction is detected by converting the current flowing to power transistor into voltage with CT1 (DC
current sensor).
When overcurrent has run to power transistor.
(Actuated even by instantaneous overcurrent)
Faulty compressor coil (disconnection, poor insulation)
Compressor startup malfunction (mechanical lock)
Faulty inverter PC board
Instantaneous fluctuation of power supply voltage
Faulty compressor (if bearing is scratched)
The stop valve is left in closed.
ESIE05-03
Part 3 – Troubleshooting