Daikin RZQ Series FCQ20EVA Service Manual page 140

Troubleshooting by Remote Controller
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
current of the inverter higher
than A (∗1) for each
Turn the main power supply OFF, and
then disconnect the connection
between the compressor and inverter.
Continuity check in the
power transistor (IGBT). Is
voltage generated
approximately at the same
increasing speed on each phase
after turning on again?
Note:
1. Electronic thermal detection value
Model
RZQ20/24LVA
RZQ36/45LVA
RZQ45/48MYL
CHECK 4 Refer to P.156.
131
Is the secondary
YES
phase?
NO
CHECK 4
NO
the continuity
normal?
YES
Is the
inverter output
NO
∗When operating compressor with
(∗1) (U-V, V-W,
W-U)
YES
Detection value
13.7A × 5 seconds or 12.7A × 260 seconds
20.0A × 260 seconds
13.0A × 5 seconds or 11.0A × 260 seconds
compressor output line disconnected,
the compressor stops due to error
after elapsed time of 5 seconds.
Therefore, check the voltage
increase for 5 seconds.
SiME281501E
Compressor overload.
Inspection of the compressor
and refrigerant system is
required.
Replace the outdoor unit PCB.
Replace the outdoor unit PCB.
Compressor inspection.
Inspect according to the
diagnosis procedure for
abnormal noises, vibration,
operating status, etc. of the
compressor.
Service Diagnosis