LG MULTI V 5 Manual Book page 72

Error No. Error Type Error Point
Error
Error Error type Error point
No. Error type Error point
No.
Excessive connec- Indoor unit capacity
Excessive connec- Indoor unit capacity
Excessive connec-
51C#HR tion of indoor unit Indoor unit capacity exceed HR unit ca-
tion of indoor unit to exceed HR unit capacity
51C#HR
tion of indoor unit to
51C#HR exceed HR unit capacity
to HR unit pacity specification
HR unit
specification
HR unit
specification
HR: Heat Recovery
HR: Heat Recovery
n Error diagnosis and countermeasure flow chart
n Error diagnosis and countermeasure flow chart
1) Check if the communication line and pipe between HR unit and indoor unit are correctly connected
1) Check if the communication line and pipe between HR unit and indoor unit are correctly connected
2) Check whether DIP switch is set for each connection conditions between HR unit and indoor unit
2) Check whether DIP switch is set for each connection conditions between HR unit and indoor unit
3) If the indoor unit connected to HR unit is in group control, check if the corresponding capacity is 100 kBtu or
3) If the indoor unit connected to HR unit is in group control, check if the corresponding capacity is 100 kBtu or
less.
less.
4) If the indoor unit connected to HR unit is not in group control, check if the corresponding capacity is 56 kBtu or
4) If the indoor unit connected to HR unit is not in group control, check if the corresponding capacity is 56 kBtu or
less (including zoning control)
less (including zoning control)
5) Even after performing the above process, if the same error code occurs, replace the corresponding HR unit
5) Even after performing the above process, if the same error code occurs, replace the corresponding HR unit
PCB
PCB
6) After checking and taking action for No.1~5 processes, carry out auto addressing, and carry out pipe search
6) After checking and taking action for No.1~5 processes, carry out auto addressing, and carry out pipe search
Error No. Error Type Error Point
Error
Error
Error type Error point
No. Error type Error point
No.
After the auto oper-
ation, if the number
After the auto operation,
After the auto operation, of the indoor units
if the number of the
if the number of the
2001
2001 Pipe detection error detected is different
2001 indoor units detected is
indoor units detected is
Master Pipe detection error
from the number
different from the number
Pipe detection error
Master
different from the number
21 ' 001
communicating indoor communicating
21 ' 001
communicating indoor
unit
indoor unit
unit
HR: Heat Recovery
HR: Heat Recovery
n Error diagnosis and countermeasure flow chart
n Error diagnosis and countermeasure flow chart
1) Check the periodic blinking of the HR unit's green LED (transmission LED )
1) Check the periodic blinking of the HR unit's green LED (transmission LED )
2) When green LED (communication LED) of HR unit blinks regularly,
2) When green LED (communication LED) of HR unit blinks regularly,
2.1) Check input power of HR unit.(220V±10%)
2.1) Check input power of HR unit.(220V±10%)
2.2) After reset of power of outdoor, wait for more than 30 minutes, temperature of pipes will be cool down then,
2.2) After reset of power of outdoor, wait for more than 30 minutes, temperature of pipes will be cool down then,
do auto-addressing
do auto-addressing
2.2) While power of HR unit is on, check total indoors display 'CH05' or not.(Refer to CH05)
2.2) While power of HR unit is on, check total indoors display 'CH05' or not.(Refer to CH05)
3) When green LED (communication LED) of HR unit blinks regularly, Check setting of rotary switch and dip
3) When green LED (communication LED) of HR unit blinks regularly, Check setting of rotary switch and dip
switch, After reset of power of outdoor and HR unit, wait for more than 30 minutes, temperature of pipes will be
switch, After reset of power of outdoor and HR unit, wait for more than 30 minutes, temperature of pipes will be
cool dow then, do auto-addressing *
cool dow then, do auto-addressing *
4) If indoor unit quantity is different between installed quantity and quantity which check thru piping searching,
4) If indoor unit quantity is different between installed quantity and quantity which check thru piping searching,
check pipe installation condition
check pipe installation condition
Outdoor unit ↔ HR unit ↔ Indoor unit
Outdoor unit ↔ HR unit ↔ Indoor unit
5) If indoor unit has not been connected to #1 valve of HR unit, set pipes of HR unit manually**
5) If indoor unit has not been connected to #1 valve of HR unit, set pipes of HR unit manually**
6) If it is not applied as above, set pipes of HR unit as manual
6) If it is not applied as above, set pipes of HR unit as manual
[NB] How to check display method of outdoor main PCB 7-segment ?:
[NB] How to check display method of outdoor main PCB 7-segment ?:
'88' ' Indoor qty which check thru 'Auto-Addressing' ' '88' ' Indoor qty which check thru 'piping checking'
'88' ' Indoor qty which check thru 'Auto-Addressing' ' '88' ' Indoor qty which check thru 'piping checking'
Copyright ©2017 LG Electronics. Inc. All right reserved.
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Only for training and service purposes
142
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Main reasons
Main reasons
1. Wrong connection of communication line
or pipe
1. Wrong connection of communication line or pipe
1. Wrong connection of communication line or pipe 2. Incorrect operation of HR unit PCB Dip
2. Incorrect operation of HR unit PCB Dip Switch
2. Incorrect operation of HR unit PCB Dip Switch
Switch
3. Indoor unit connection each HR unit connection port
3. Indoor unit connection each HR unit connection port 3. Indoor unit connection each HR unit con-
exceeding the capacity
exceeding the capacity
nection port exceeding the capacity
Main Reasons
Main reasons
Main reasons
1. HR unit's power cable or communication
cable connection defect
1. HR unit's power cable or communication cable connec-
1. HR unit's power cable or communication cable connec- 2. After auto-addressing, wrong address
tion defect
tion defect
setting of the indoor unit (Defective indoor
2. After auto-addressing, wrong address setting of the
2. After auto-addressing, wrong address setting of the
power / transmission error and PCB defect)
indoor unit (Defective indoor power / transmission error
indoor unit (Defective indoor power / transmission error
3. Wrong setting of the HR unit's rotary switch
and PCB defect)
and PCB defect)
or dip switch
3. Wrong setting of the HR unit's rotary switch or dip switch
3. Wrong setting of the HR unit's rotary switch or dip switch
4. HR unit PCB defect 4. HR unit PCB defect
4. HR unit PCB defect
- 158 -
- 158 -
LGE Internal Use Only
LGE Internal Use Only
Error No. Error type Error point
HR unit liquid pipe tem- Abnormal value of sensor
Error No. Error Type Error Point
201C#HR
perature sensor error measurement (Open / Short)
HR unit liquid pipe Abnormal value of
201C#HR temperature sensor sensor measurement
error (Open / Short)
Error No. Error type Error point
Error No. Error Type Error Point
HR unit
HR unit Sub-
Sub-cooling inlet pipe Abnormal value of sensor
202C#HR
Abnormal value of
temperature sensor measurement(Open / Short )
cooling inlet pipe
202C#HR sensor measurement
error
temperature sensor
(Open / Short)
error
Error No. Error type Error point
Error No. Error Type Error Point
HR unit Sub-
Abnormal value of
HR unit
cooling discharge
203C#HR sensor measurement
Abnormal value of sensor
Sub-cooling discharge
pipe temperature
203C#HR
(Open / Short)
pipe temperature sensor measurement(Open / Short)
sensor error
error
n Error diagnosis and countermeasure flow chart
1) Check connection condition of temperature sensor and lead cable
2) Is value of temperature sensor normal? If not replace sensor
- Piping temperature sensor : 10°C = 10kΩ : 25°C= 5kΩ : 50°C= 1.8kΩ
3) If connection of sensor and value is correct, replace outdoor unit PCB
n HR unit error display No.
HR Unit HR #1 HR #2 HR #3 HR #4 HR #5 HR #6 HR #7
C01 C02 C03 C04 C05 C06 C07
Error display
n Example of HR unit error display.
#16 HR unit Sub-cooling inlet pipe temperature sensor error 200 ' C16 (Repeat)
C: HR unit
#: HR unit Nuber
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main reasons
• Defective temperature sensor connection
• Defective temperature sensor
Main Reasons
(Open/Short)
1. Defective temperature sensor connection
• Defective outdoor unit PCB
2. Defective temperature sensor
(Open/Short)
3. Defective outdoor unit PCB
Main reasons
Main Reasons
• Defective temperature sensor connection
• Defective temperature sensor
1. Defective temperature sensor connection
(Open/Short)
2. Defective temperature sensor
• Defective outdoor unit PCB
(Open/Short)
3. Defective outdoor unit PCB
Main reasons
Main Reasons
1. Defective temperature sensor connection
• Defective temperature sensor connection
2. Defective temperature sensor
• Defective temperature sensor
(Open/Short)
(Open/Short)
3. Defective outdoor unit PCB
• Defective outdoor unit PCB
HR #8 HR #9 HR #10 HR #11 HR #12 HR #13 HR #14 HR #15 HR#16
C08 C09 C10 C11 C12 C13 C14 C15
- 159 -
LGE Internal Use Only
143
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C16