Daikin ERSQ 011AAV1 Service Manual page 206

Troubleshooting by Indication on the Remote Controller
Troubleshooting
When the compressor is running,
measure the voltage between + and -
of electrolytic capacitor (C+, C-).
∗1: Inverter's Power Transistors Check : Refer to information on P.233~235.
∗
Check No.3
194
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Caution
Have the
power supply
voltages between L1 and L2,
L2 and L3, and L1 and L3 fallen within
the range of 380 to 415V±10% (50 Hz) and
between L and N within the range
of 220 to 240V±10%
(50 Hz)?
YES
Check the inverter power
transistor. *1
Is the power
transistor faulty?
NO
Check No.3
Is the resistance above standard
value?
YES
Is the
measured voltage 220
VDC or more?
NO
: Refer to information on P.208.
NO
YES
NO
YES
ESIE09-08
Correct the power supply
voltages.
If L2 or Phase N is open, replace
the switch box.
Replace the inverter PC board
assy (A2P).
Check for the PC board
conditions.
In case of significant failure,
the PC board may have got
faulty due to faulty
compressor. Consequently,
even if the PC board is
replaced, it may get faulty
again. To avoid that, recheck
the compressor for grounding
and for any broken wires.
Furthermore, even after
replacing the PC board, carry
out inspections on the
compressor.
Replace the fan motor
Monitor the voltage
(Instantaneous voltage drop)
Replace the inverter PC board
(A2P).
(S2605)
Troubleshooting