Daikin RXSQ24TAVJU, Руководство по обслуживанию, Страница: 277 / 311

SiUS331708EA Check
Service Diagnosis 264
5.8 List of Inverter-Related Error Codes
Code Name Condition for determining error Major cause
Co
mpres
s
or curre
nt
L5 Instantaneous overcurrent of
inverter compressor • Inverter output current exceeds 59.1 A even
instantaneously.
• Liquid sealing
• Defective compressor
• Defective inverter PCB
L8
Overcurrent of inverter
compressor
(Electronic superheating
protection sensor) • Compressor overload running
A current of 33.5 A or more continues for a
period of consecutive 5 seconds or that of
27.6 A or more continues for a period of
consecutive 260 seconds.
• The inverter loses synchronization.
• Back-flow of compressor liquid
• Sudden changes in loads
• Disconnected compressor wiring
• Defective PCB
P
rot
ect
ion device and ot
hers
E5 Inverter compressor lock • The compressor is in the locked status (does
not rotate).
• Defective compressor
L1 Defective PCB (for inverter
compressor) • No output is given. • Defective heavy current part of
compressor
L4 Radiation fin temperature rise • The radiation fin temperature reaches 87°C
(188°F) or more (while in operation).
• Defective fan
• Running in overload for an
extended period of time
• Defective PCB
L9
Defective startup of inverter
compressor • The compressor motor fails to start up. • Liquid sealing or defective
compressor
• Excessive oil or refrigerant
• Defective PCB
LC Transmission error (between
microcomputers on the outdoor
main PCB) • No communications are carried out across the
microcomputers on the outdoor main PCB.
• Defective outdoor main PCB
P1 Imbalanced power supply • Power supply voltages get significantly
imbalanced among three phases.
• Power supply error (imbalanced
voltages of 2% or more)
• Defective PCB
• Dead PCB
P4 Defective radiation fin thermistor • The radiation fin thermistor gets short circuited
or open.
• Defective radiation fin thermistor
U2
Power supply voltage error • The inverter power supply voltage is high or
low.
• Power supply error
• Defective PCB
CHECK 9