L5" Dc Output Overcurrent (Instantaneous) - Daikin SkyAir Service Manual

SiBE28-804

5.30 "L5" DC Output Overcurrent (Instantaneous)

L5
Remote
Controller
Display
Applicable RZQ(S)71~140
Models
Method of Malfunction is detected by converting the current flowing to power transistor into voltage with
CT1 (DC current sensor).
Malfunction
Detection
Malfunction When overcurrent has run to power transistor.
(Actuated even by instantaneous overcurrent)
Decision
Conditions
Supposed
Causes
Troubleshooting
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.
Troubleshooting by Remote Controller Display / LED Display
201