SiAF332111E Check
Part 6 Service Diagnosis 349
6.10 Concept of Inverter-Related Error Codes
CHECK 10
Model A (A) B (A) C (A) D (°C)
RXQ4AR 36.9 17.0 14.8 92
RXQ5AR 51.5 31.0 24.1 85
RXMQ10/12AR 59.1 33.5 27.6 87
P4L1 L4 9L5EJP1P2U
L5 L8
PCB mismatchingImbalanced power supply voltage
Power supply voltage error
or 380 VAC ± 3%
Radiation fin temperature rise
Defective radiation fin thermistor
Overcurrent of compressor
Compressor
Instantaneous overcurrent of compressor
(When inverter output current exceeds A
(A) even instantaneously)
(1)
A current of B (A) or more
continues for a period of
consecutive 5 seconds.
(2)
A current of C (A) or more
continues for a period of
consecutive 260 seconds.
Defective startup of compressor
(Compressor stops running
immediately after it starts up.)
Defective radiation inverter
Low voltage
part
High voltage part
(Power
transmission etc.)
Power supply
(1 phase, 220-240 VAC)
(3 phase, 380 VAC)
When imbalance in
voltages among
phases comes to 2%
or more
When the radiation fin thermistor resistor detects
an open circuit (–30˚C or less) or a short
circuit (120˚C or more)
When the radiation fin
temperature reached
D (˚C) or more
Compressor lock (Compressor
does not run at all.)
When incorrect inverter
PCB is connected
Outdoor
main
PCB
When the power supply
voltage falls out of the range
of 220-240 VAC ± 10%
When the radiation heavy current part of
inverter gets defective (gives no output)
LC
Transmission error
When transmissions between the
main PCB and the inverter PCB
are not normal
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