E5" Inverter Compressor Motor Lock - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

Diagnosis by Remote Controller

4.18 "E5" Inverter Compressor Motor Lock

E5
Remote
Controller
Display
Applicable RZQ
Models
Method of Detect the motor lock when the compressor is energized.
Malfunction
Detection
Malfunction If the motor rotor does not rotate when the compressor is energized.
Decision
Conditions
Supposed
Causes
Troubleshooting
124
Compressor lock
High differential pressure (2.6MPa or more) starting
Incorrect UVWN wiring
Faulty inverter PC board
Stop valve is left in closed.
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check the installation
conditions.
Is the stop
valve open?
YES
Check and see
whether compressor is
short-circuited or
ground.
NO
Is high
differential
pressure starting?
(2.6MPa or more)
NO
Does low
or high pressure
vary even instantaneously
when restarting
compressor?
NO
NO
YES
YES
YES
SiBE26-701
Open the stop valve.
Replace the compressor.
Remedy the cause.
Replace the inverter PC board
(A2P).
Replace the compressor.
Troubleshooting