171
COMMISSIONING
ENGLISH
Error code
Title Cause of error Check point
22 CT 2 (Max CT) • Input over-current
• Malfunction of compressor
• Blocking of pipe
• Low voltage input
• Refrigerant, Pipe length, Blockage...
23
DC Link Voltage is
low or high
• DC Link Voltage is above
420 V DC
• DC Link Voltage is below
140 V DC
• Check CN_(L), CN_(N) Connection
• Check Input Voltage
• Check PCB DC Link voltage sensor parts
26
DC Compressor
positioning
• Compressor starting fail
error
• Check the connection of comp wire
“U,V,W”
• Malfunction of compressor
• Check the component of “IPM”,
detection parts.
27
AC input instant
over-current
• PCB(Inverter) input current
is over100 A(peak) for 2 us
• Overload operation (Pipe
clogging/Covering/EEV defect/Ref.
overcharge)
• Compressor damage (Insulation
damage/Motor damage)
• Input voltage abnormal (L,N)
• Powerline assemble condition abnormal
• ODU-PCB (Assembly 1) damage (input
current sensing part)
29
Inverter
compressor over-
current
• (HM**1M U*3) INV input
current >= 30 A.
• (HM**3M U*3) INV input
current >= 24 A.
• Overload operation (Pipe
clogging/Covering/EEV defect/Ref.
overcharge)
• Compressor damage (Insulation
damage/Motor damage)
• Input voltage low
• ODU-PCB (Assembly 1) damage
32
Temperature at
discharge-pipe is
too high
• Overload operation
(Outdoor fan constraint,
screened, blocked)
• Refrigerant leakage or
insufficient charge
• INV Comp. discharge
sensor failure
•
LEV connector displaced/poor
• LEV assembly
• Check outdoor fan constraint/ screened/
flow structure
• Check refrigerant leakage
• Check if the sensor is normal
• Check the status of EEV assembly
35 Low Pressure error
• Excessive decrease of low
pressure
• Defective low pressure sensor
• Defective fan (motor)
• Refrigerant shortage/leakage
• Deformation of refrigerant pipe
• Defective EEV
• Outdoor-HEX blocked
• SVC valve clogging
• Defective PCB(Inverter)
• Defective Pipe sensor
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