E5" Outdoor Unit: Inverter Compressor Motor Lock - Daikin ERSQ 011AAV1 Service Manual

ESIE09-08
3.17 "E5 " Outdoor Unit: Inverter Compressor Motor Lock
E5
Remote Control
Display
Applicable
ER*Q 011~016*
Models
Method of
Inverter PC board takes the position signal from UVW line connected between the inverter and
compressor, and the malfunction is detected when any abnormality is observed in the phase-
Malfunction
current waveform.
Detection
Malfunction
This malfunction will be output when the inverter compressor motor does not start up even in
Decision forced startup mode.
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Compressor lock
High differential pressure (0.5MPa or more)
Incorrect UVW wiring
Faulty inverter PC board
Stop valve is left in closed.
Be sure to turn off power switch before connect or disconnect connector, or
Caution
parts damage may be occurred.
Check the installation
conditions.
Is
the stop valve
open?
YES
Is the UVW wiring
normal?
YES
Is high
differential pressure starting?
(0.5MPa or more)
NO
Check and see
whether compressor is
short-circuited or
ground.
NO
Are
inverter output
voltages the same for 3
phases?
YES
Does low or
high pressure vary
even instantaneously when
restarting compressor?
NO
Troubleshooting by Indication on the Remote Controller
NO
NO
YES
YES
NO
YES
Open the stop valve.
Connect correctly.
Remedy the cause.
Replace the compressor.
Replace the inverter PC board
Assy (A2P).
Replace the compressor.
(V2793)
153