Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 243

SiUS331604E
CHECK 10
Concept of inverter-related error codes
Power supply
(Single phase, 208/230 VAC)
U2 P1
Imbalanced power supply voltage
When imbalance in
voltages among three
phases comes to 3%
or more
Power supply voltage error
When the power supply
voltage falls out of the range
of 208/230 VAC ± 10%
Service Diagnosis
LC
Low voltage
part
High voltage part
(Power
transmission etc.)
L1 P4
Defective radiation fin thermistor
When the radiation fin thermistor resistor detects
an open circuit (–30˚C (–22˚F) or less) or a short
circuit (120˚C (248˚F) or more)
Defective radiation inverter
When the radiation heavy current part of
inverter gets defective (gives no output)
Outdoor
main
PCB
L5 L8
L4
Radiation fin temperature rise
When the radiation fin
temperature reached
87˚C (188˚F) or more
Troubleshooting by Error Code
Transmission error
When transmissions between the
microcomputers on the main
PCB are not normal
Instantaneous overcurrent of inverter
compressor (When inverter output current
exceeds 59.1 A even instantaneously)
Overcurrent of inverter compressor
(1) A current of 33.5 A or more
continues for a period of
consecutive 5 seconds.
(2) A current of 27.6 A or more
continues for a period of
consecutive 260 seconds.
E5 L9
Defective startup of inverter compressor
(Compressor stops running
immediately after it starts up.)
Inverter compressor lock
(Compressor does not run at all.)
230