LG HN1639HC NK0 Installation Manual

COMMISSIONING
172
Error code Title Cause of error Check point
41
Problem in
discharge-pipe
temperature
sensor
• Open / Short
• Soldered poorly
• Internal circuit error
• Bad connection of thermistor connector
• Defect of thermistor connector
(Open/Short)
• Defect of outdoor PCB(Inverter)
43
(High-)pressure
sensor
(Open/Short)
• Abnormal value of sensor
(Open/Short)
• Bad connection of connector
PCB(Inverter)
• Bad connection high pressure connector
• Defect of high pressure connector
(Open/Short)
• Defect of connector PCB(Inverter)
(Open/Short)
• Defect of PCB(Inverter)
44
Problem in AIR
temperature
sensor
• Open / Short
• Soldered poorly
• Internal circuit error
• Bad connection of thermistor connector
• Defect of thermistor connector
(Open/Short)
• Defect of outdoor PCB(Inverter)
45
Problem in
condenser-middle-
pipe temperature
sensor
• Open / Short
• Soldered poorly
• Internal circuit error
• Bad connection of thermistor connector
• Defect of thermistor connector
(Open/Short)
• Defect of outdoor PCB(Inverter)
46
Problem in suction-
pipe temperature
sensor
• Open / Short
• Soldered poorly
• Internal circuit error
• Bad connection of thermistor connector
• Defect of thermistor connector
(Open/Short)
• Defect of outdoor PCB(Inverter)
52
Correspondence
Error (Inverter-PCB
↔ Outdoor-PCB)
• Communication line
between Outdoor-PCB and
Inverter-PCB is broken
• Inverter-PCB is damaged
• Generation of noise source interfering
with communication
• Checking the communication state
between Outdoor-PCB and Inverter-PCB
53
Correspondence
Error (Outdoor-PCB
↔ Indoor-PCB)
• Communication line
between Outdoor-PCB and
Indoor-PCB is broken
• Indoor-PCB is damaged
• Check condition and polarity of wire
between Outdoor- and Indoor-PCB
• Check internal wiring between terminal
blocks and PCB
• Check software versions of Outdoor-
and Indoor-PCB
54
Phase sequence
incorrect
• Prevention of phase
unbalance and prevention of
reverse rotation of constant-
rate compressor
• Main power wiring fault
55
Modbus
communication
error (Modbus ↔
Indoor-PCB)
• Not applicable to this
model ?

LG HN1639HC NK0 Specifications

General

Brand	LG
Model	HN1639HC NK0
Category	Heat Pump
Language	English