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Title
code
Problem in Cond.
45
middle pipe
temperature sensor
Problem in suction
46
pipe temperature
sensor
PCB Communication
52
Error
Open and Reverse
54
Phase Error
PCB(Inverter) & Main
60
EEPROM check sum
error
High temperature
61
in Cond. Pipe
Heat sink Temp,
62
High error
Problem in heat sink
65
Temperature sensor
67
Fan lock error
Problem in Vapor
114
injection inlet
temperature sensor
Cause of error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
Checking the communication state
between Main PCB and Inverter PCB
Prevention of phase unbalance and
prevention of reverse rotation of
constant-rate compressor
EEPROM Access error and Check
SUM error
• Overload operation (Outdoor fan
constraint, screened, blocked)
• Unit heat exchanger contaminated
• EEV connector displaced / poor
EEV assembly
• Poor Cond. Pipe sensor assembly /
burned
Heat sink sensor detected high
temp.(85 °C)
Abnormal value of
sensor(Open/Short)
Fan RPM is less than 10 for 5
seconds from start-up operation.
Fan RPM is less than 40 in operation
except for start-up operation
• Open (Below -48.7 °C)/ Short(Over
96.2 °C)
• Soldered poorly
• Internal circuit error
COMMISSIONING
Check point & Normal condition
• Bad connection of thermistor connector
• Defect of thermistor connector (Open/Short)
• Defect of outdoor PCB(Inverter)
• Bad connection of thermistor connector
• Defect of thermistor connector (Open/Short)
• Defect of outdoor PCB(Inverter)
• Generation of noise source interfering with
communication
• Main power wiring fault
• EEPROM contact defect/wrong insertion
• Different EEPROM Version
• ODU Inverter & Main PCB assembly 1 damage
• Check outdoor fan constraint / screened / flow
structure
• Check if refrigerant overcharged
• Check the status of EEV assembly
• Check the status of sensor assembly / burn
• Part no. : EBR37798101~09
- Check the heat sink sensor: 10 kΩ / at
25 °C(Unplugged)
- Check the outdoor fan is driving rightly
• Part no. : EBR37798112~21
- Check the soldered condition in the 22,23 pin of IPM,
PFCM
- Check the screw torque of IPM, PFCM
- Check the spreadable condition of thermal grease on
IPM, PFCM
- Check the outdoor fan is driving rightly
• Check if there is defect of thermistor connector
(Open/Short)
• Check defect of outdoor PCB(Inverter)
• Fan motor damage.
• Assembly condition abnormal.
• Jammed fan by surroundings.
• Bad connection of thermistor connector
• Defect of thermistor connector (Open/Short)
• Defect of outdoor PCB(Outdoor)
199
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