Concept Of Inverter-Related Error Codes - Daikin VRVII Manual

Troubleshooting by Indication on the Remote Controller
CHECK 10
Power supply
(3 phase, 460VAC)
(3 phase, 230VAC)
U2 P1
Imbalanced power
supply voltage
When
imbalance in
voltages among
three phases
comes to 2% or
more
Power supply
voltage error
When the power
supply voltage
falls out of the
range of
460VAC±10%
230VAC±10%
Concept of inverter-related error
codes
Main (Service
monitor) PCB
LC
Weak-current
part
Heavy-current
part (Power
transmission etc.)
L1 P4
Radiation fin
temperature rise
Defective radiation fin thermistor
When the radiation fin
thermistor resistor detects an
open circuit (-30˚C or less) or a
short circuit (120˚C or more)
Defective radiation inverter
When the radiation heavy
current part of inverter gets
defective (gives no output)
Inverter
PCB
L5 L8
L4 PJ
PCB mismatching
When incorrect
inverter PCB is
connected
When the
radiation fin
temperature
reached 87˚C or
more
Transmission error
When transmissions
between the main PCB
and the inverter PCB
are not normal
Instantaneous overcurrent of inverter
compressor (When inverter output
current exceeds 460V units: 32.3A
230V units: 59.1A even
instantaneously)
Overcurrent of inverter
compressor
For 460V units
An overcurrent of 19.0A
or more continues for a
period of 5 consecutive
seconds
An overcurrent of 16.1A
or more continues for a
period of 260 consecutive
seconds.
For 230V units
A current of 33.5A or
more continues for a
period of consecutive 5
sec.
A current of 27.6A or
more continues for a
period of consecutive 260
sec.
E5 L9
Defective startup of
inverter compressor
(Compressor stops
running immediately
after it starts up.)
Inverter compressor lock
(Compressor does not
run at all.)
367