List Of Inverter-Related Error Codes - Daikin SkyAir RZR-TA Series Service Manual

SiUS281811EA
5.8

List of Inverter-Related Error Codes

CHECK 9
Code
Instantaneous overcurrent of
L5 inverter compressor
Overcurrent of inverter
compressor
(Electronic superheating
L8
protection sensor)
Inverter compressor lock
E5
Defective PCB (for inverter
L1
compressor)
Radiation fin temperature rise
L4
Defective startup of inverter
compressor
L9
Transmission error (between
LC microcomputers on the outdoor
main PCB)
Imbalanced power supply
P1
Defective radiation fin thermistor • The radiation fin thermistor gets short
P4
Power supply voltage error
U2
Part 6 Service Diagnosis
Name Condition for determining error
• Inverter output current exceeds 59.1 A
even instantaneously.
• 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.
• The compressor is in the locked status
(does not rotate).
• No output is given.
• The radiation fin temperature reaches 87°C
(188°F) or more (while in operation).
• The compressor motor fails to start up.
• No communications are carried out across
the microcomputers on the outdoor main
PCB.
• Power supply voltages get significantly
imbalanced among three phases.
circuited or open.
• The inverter power supply voltage is high
or low.
Major cause
• Liquid sealing
• Defective compressor
• Defective inverter PCB
• Back-flow of compressor liquid
• Sudden changes in loads
• Disconnected compressor
wiring
• Defective PCB
• Defective compressor
• Defective heavy current part of
compressor
• Defective fan
• Running in overload for an
extended period of time
• Defective PCB
• Liquid sealing or defective
compressor
• Excessive oil or refrigerant
• Defective PCB
• Defective outdoor main PCB
• Power supply error
(imbalanced voltages of 2% or
more)
• Defective PCB
• Dead PCB
• Defective radiation fin
thermistor
• Power supply error
• Defective PCB
Check
299