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

Troubleshooting by Indication on the Remote Controller
3.18 "E5 " Indoor Unit: Inverter Compressor Motor Lock
E5
Remote Control
Display
Subcode 6
Applicable
All indoor units
Models
Method of Inverter PC board takes the position signal from UVW line connected between the inverter and
Malfunction compressor, and the malfunction is detected when any abnormality is observed in the phase-
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
220V. Use correct precautions when servicing.
154
Compressor lock (liquid suction (oil shortage))
High differential pressure (0.5MPa or more)
Incorrect UVW wiring
Faulty inverter PC board
Stop valve is left in closed.
Warning: CAPACITOR SHOCK HAZARD. The capacitors (top surfaces) can hold up to
Be sure to turn off power switch before connecting or disconnecting
connector, otherwise parts may be damaged.
Caution
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
NO
NO
YES
YES
NO
YES
ESIE09-08
Open the stop valve.
Connect correctly.
Remedy the cause.
Replace the compressor.
Replace the inverter PC
board Assy.
Replace the compressor.
(V2793)
Troubleshooting