162
COMMISSIONING
ENGLISH
Display
code
Title
Cause of error
Check point & Normal condition
41
Problem in D-pipe
temperature sensor
• Open / Short
• Soldered poorly
• Internal circuit error
1. Bad connection of thermistor connector
2. Defect of thermistor connector (Open/Short)
3. Defect of outdoor PCB(Inverter)
43
Problem in high
pressure sensor
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 outdoor
air temperature
sensor
• Open / Short
• Soldered poorly
• Internal circuit error
1. Bad connection of thermistor connector
2. Defect of thermistor connector (Open/Short)
3. Defect of outdoor PCB(Inverter)
45
Problem in Cond.
middle pipe
temperature sensor
• Open / Short
• Soldered poorly
• Internal circuit error
1. Bad connection of thermistor connector
2. Defect of thermistor connector (Open/Short)
3. Defect of outdoor PCB(Inverter)
46
Problem in suction
pipe temperature
sensor
• Open / Short
• Soldered poorly
• Internal circuit error
1. Bad connection of thermistor connector
2. Defect of thermistor connector (Open/Short)
3. Defect of outdoor PCB(Inverter)
52
PCB Communication
Error
Checking the communication state
between Main PCB and Inverter PCB
• Generation of noise source interfering with
communication
54
Open and Reverse
Phase Error
Prevention of phase unbalance and
prevention of reverse rotation of
constant-rate compressor
Main power wiring fault
60
PCB(Inverter) & Main
EEPROM check sum
error
EEPROM Access error and Check
SUM error
1. EEPROM contact defect/wrong insertion
2. Different EEPROM Version
3. ODU Inverter & Main PCB assembly 1 damage
61
High temperature
in Cond. Pipe
• Overload operation (Outdoor fan
constraint, screened, blocked)
• Unit heat exchanger contaminated
• EEV connector displaced / poor
EEV assembly
• Poor Cond. Pipe sensor assembly /
burned
• Check outdoor fan constraint / screened / flow structure
• Check if refrigerant overcharged
• Check the status of EEV assembly
• Check the status of sensor assembly / burn
62
Heat sink Temp,
High error
Heatsink temperature is greater than
110 °C.
1. Part no. : EBR37798101~09
- Check the heatsink sensor: 10 k
Ω
/ at
25 °C(Unplugged)
- Check the outdoor fan is driving rightly
2. 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
65
Problem in Heatsink
Temperature sensor
Abnormal value of sensor
(Open/Short)
• Check if there is defect of thermistor connector
(Open/Short)
• Check defect of outdoor PCB(Inverter)
Summary of Contents for Therma V HM091MRS
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