Daikin ALTHERMA HT ERSQ 014 V1 - E5 Outdoor Unit: Inverter Compressor Motor Lock

Troubleshooting by Indication on the Remote Controller ESIE09-08A
166 Troubleshooting
3.18 “E5 ” Outdoor Unit: Inverter Compressor Motor Lock
Remote Control
Display
E5
Applicable Models ER*Q 011~016*
Method of
Malfunction
Detection
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-current
waveform.
Malfunction
Decision Conditions
This malfunction will be output when the inverter compressor motor does not start up even in forced
startup mode.
Supposed Causes  Compressor lock
 High differential pressure (0.5MPa or more)
 Incorrect UVW wiring
 Faulty inverter PC board
 Stop valve is left in closed.
Troubleshooting
Check the installation
conditions.
Is
the stop valve
open?
NO
Is the UVW wiring
normal?
NO
NO
NO
NO
Is high
dierential 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 o 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
Assy (A2P).
Replace the compressor.
(V2793)
NO