Daikin FXDQ50NVE [134/218] E5 compressor motor lock

Daikin FXDQ20NVE [134/218] E5 compressor motor lock
SiBE39-402 Troubleshooting by Indication on the Remote Controller
Troubleshooting 125
4.17 E5 Compressor Motor Lock
Remote
Controller
Display
E5
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Inverter PC board takes the position signal from UVWN line connected between the inverter and
compressor, and detects the position signal pattern.
Malfunction
Decision
Conditions
The position signal with 3 times cycle as imposed frequency is detected when compressor
motor operates normally, but 2 times cycle when compressor motor locks. When the position
signal in 2 times cycle is detected.
Supposed
Causes
! Compressor lock
! High differential pressure (0.5MPa or more)
! Incorrect UVWN wiring
! Faulty inverter PC board
! Stop valve is left in closed.
Troubleshooting
Check the installation
conditions.
Is the stop valve open?
NO
Is the UVWN wiring
normal?
NO
NO
NO
NO
Is high
differential pressure
starting? (0.5MPa
or more)
YES
YES
YES
Check and see
whether compressor is
short-circuited or
ground.
YES
YES
Are inverter output
voltages the same for
3 phases?
Does low or
high pressure vary
even instantaneously
when restarting
compressor?
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Open the stop valve.
Connect correctly.
Remedy the cause.
Replace the compressor.
Replace the inverter PC
board (A2P).
Replace the compressor.
(V2793)
NO

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